{
    "model": {
        "rank": 5548,
        "code": "thing-q202218",
        "model_id": "vr.tr.diethyl-ether",
        "name": "diethyl ether",
        "purpose": "Enable an agent to identify diethyl ether, assess the condition and suitability of a particular sample, and determine which uses require additional evidence or controls.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.MAT",
        "industry": "",
        "version": "",
        "url": "/models/thing/q202218/",
        "tier": 2,
        "score": 66,
        "payload": {
            "layer": "wikidata",
            "aliases": [],
            "aliasCount": 0,
            "merged": 0,
            "knownIn": 66,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": null,
            "source": {
                "dataset": "wikidata",
                "item": "Q202218",
                "url": "https://www.wikidata.org/wiki/Q202218",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-09T22:37:01Z",
                "providers": [
                    "Codex"
                ],
                "breadth": "recalled by Codex without web access - no source was read",
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "seconds": 26.3,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a08850-373b-7331-a681-05f223c4c5e1\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: diethyl ether\nSense to describe: (none recorded)\nDomain code: PHY.MAT\nAlso known as: (none)\n\n\nContext for this batch of 188 things:\n# Batch 006: 1001 re",
                        "usd": 0,
                        "recall": true
                    },
                    "codex": {
                        "seconds": 68.5,
                        "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.4\n--------\nworkdir: R:\\02_PROJECTS\\02_Meta_Models_Platforms\\Ver.cy\\current\\thing-registry-backlog\nmodel: gpt-6-astra\nprovider: openai\napproval: never\nsandbox: read-only\nreasoning effort: none\nreasoning summaries: none\nsession id: 01a08850-3717-7dc2-9f03-c836f335d4f9\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: diethyl ether\nRegistry id: vr.tr.diethyl-ether\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entry: (none"
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q202218",
                "registryId": "vr.tr.diethyl-ether",
                "name": "diethyl ether",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.MAT"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q202218/",
            "model": {
                "registry_id": "vr.tr.diethyl-ether",
                "name": "diethyl ether",
                "purpose": "Enable an agent to identify diethyl ether, assess the condition and suitability of a particular sample, and determine which uses require additional evidence or controls.",
                "definition": "Diethyl ether is the organic compound (C2H5)2O, a symmetrical ether consisting of two ethyl groups bonded to an oxygen atom, occurring as a highly volatile, extremely flammable liquid at ordinary room temperature and atmospheric pressure.",
                "scope_statement": "This model owns the molecular identity of diethyl ether and the composition, physical state, quality, stability and applicable hazard evidence of material identified as registry entry vr.tr.diethyl-ether in PHY.MAT.",
                "in_scope": [
                    "Diethyl ether identity, synonyms, structural identifiers and verified registry cross-references",
                    "Sample purity, grade, water content, stabilizers and relevant impurities",
                    "Physical properties with measurement conditions and uncertainty",
                    "Peroxide formation, storage history and evidence of sample deterioration",
                    "Hazard classification, exposure criteria and suitability for a stated use"
                ],
                "out_of_scope": [
                    "The ether functional-group class and other individual ether compounds",
                    "Commercial formulations containing diethyl ether as one constituent",
                    "Manufacturing processes and their equipment",
                    "Extraction, reaction and purification procedures as activities",
                    "Clinical anesthesia practice and patient-specific treatment decisions",
                    "Facility ventilation, fire protection and waste-management systems"
                ],
                "distinguishing_features": [
                    "Require the connectivity CH3CH2-O-CH2CH3: the oxygen joins two ethyl groups, distinguishing diethyl ether from other ethers.",
                    "Use molecular connectivity alongside formula C4H10O; that formula also describes alcohols and other ether isomers.",
                    "Distinguish the specific substance from the broad term 'ether', which can denote a chemical class or an ambiguous product label.",
                    "Exclude petroleum ether, which names a hydrocarbon mixture rather than diethyl ether.",
                    "Separate evidence of diethyl ether as a constituent from evidence that a whole sample qualifies as a stated grade of diethyl ether."
                ],
                "characteristics": [
                    {
                        "name": "Molecular identity",
                        "kind": "category",
                        "unit_or_values": "C4H10O; connectivity CH3CH2-O-CH2CH3; independently verified structural identifiers",
                        "why_it_matters": "Distinguishes the substance from structural isomers and materials sold under ambiguous ether names."
                    },
                    {
                        "name": "Registry cross-references",
                        "kind": "relation",
                        "unit_or_values": "CAS, PubChem CID and EC identifiers linked to a consulted authority",
                        "why_it_matters": "Connects scientific, supplier and regulatory records without relying on name matching alone."
                    },
                    {
                        "name": "Assay and impurity profile",
                        "kind": "measurement",
                        "unit_or_values": "Mass fraction or amount fraction with method, detection limits and identified impurities",
                        "why_it_matters": "Determines whether a sample satisfies a use-specific specification."
                    },
                    {
                        "name": "Water content",
                        "kind": "measurement",
                        "unit_or_values": "mg/kg or mass percent with method and sampling date",
                        "why_it_matters": "An anhydrous designation requires supporting evidence and may cease to describe an opened sample."
                    },
                    {
                        "name": "Stabilizer identity and concentration",
                        "kind": "measurement",
                        "unit_or_values": "Named stabilizer and concentration in mg/kg; absent or unknown only when supported",
                        "why_it_matters": "Stabilizers can affect application compatibility and do not replace assessment of peroxide condition."
                    },
                    {
                        "name": "Grade and specification",
                        "kind": "category",
                        "unit_or_values": "Supplier or standard-defined grade, specification revision and conformance evidence",
                        "why_it_matters": "Grade labels are meaningful only through the requirements and evidence behind them."
                    },
                    {
                        "name": "Physical phase",
                        "kind": "state",
                        "unit_or_values": "Solid, liquid, vapor or multiphase at recorded temperature and pressure",
                        "why_it_matters": "State affects containment, transfer and interpretation of property measurements."
                    },
                    {
                        "name": "Phase-transition properties",
                        "kind": "measurement",
                        "unit_or_values": "Melting and boiling temperatures in °C or K, with pressure, purity and source",
                        "why_it_matters": "Allows comparison of observed behavior with reference material under matching conditions."
                    },
                    {
                        "name": "Volatility and density",
                        "kind": "measurement",
                        "unit_or_values": "Vapor pressure in kPa and liquid density in kg/m³ at specified temperatures",
                        "why_it_matters": "Supports assessment of vapor generation and conversion between mass and volume."
                    },
                    {
                        "name": "Peroxide condition",
                        "kind": "state",
                        "unit_or_values": "Unknown, assessed or suspect; linked quantitative result with method, units, date and limitations",
                        "why_it_matters": "A current assessment is necessary to distinguish measured condition from assumptions based on age or appearance."
                    },
                    {
                        "name": "Storage and opening history",
                        "kind": "relation",
                        "unit_or_values": "Receipt, opening and assessment dates; documented light, air and temperature exposure",
                        "why_it_matters": "Provides context for deterioration and for deciding whether earlier quality evidence still applies."
                    },
                    {
                        "name": "Hazard and exposure criteria",
                        "kind": "relation",
                        "unit_or_values": "Jurisdiction-specific classifications and exposure limits with units, averaging periods, dates and sources",
                        "why_it_matters": "Prevents an agent from treating classifications or numerical limits as universally applicable."
                    }
                ],
                "affordances": [
                    "Resolve an ether label to diethyl ether using structural and documentary evidence.",
                    "Compare a sample's assay, water and stabilizer content against a stated application specification.",
                    "Assess whether physical-property evidence applies at the sample's temperature, pressure and composition.",
                    "Flag missing or stale peroxide and storage evidence for qualified assessment.",
                    "Identify applicable hazard, exposure and transport records for a specified jurisdiction and material form.",
                    "Record a use restriction or referral for specialist disposition when condition evidence is insufficient."
                ]
            },
            "sources": [],
            "structure": {
                "bundles": [
                    {
                        "id": "diethyl-ether-identity",
                        "name": "Diethyl ether identity",
                        "description": "Establishes the specific molecular substance behind a name, identifier or sample label.",
                        "rationale": "The word ether and the formula C4H10O do not independently establish diethyl ether identity.",
                        "layers": [
                            {
                                "id": "structure-and-names",
                                "name": "Structure and names",
                                "description": "Resolves molecular connectivity and ambiguous terminology.",
                                "findings": [
                                    {
                                        "id": "two-ethyl-groups-linked-by-oxygen",
                                        "name": "Two ethyl groups linked by oxygen",
                                        "description": "Recognition requires evidence for the diethyl ether structure rather than formula or an informal ether label alone.",
                                        "questions": [
                                            {
                                                "text": "What structural identifier or analytical evidence establishes CH3CH2-O-CH2CH3?",
                                                "kind": "definition",
                                                "id": "two-ethyl-groups-linked-by-oxygen-q01"
                                            },
                                            {
                                                "text": "Does 'ether' in this record mean diethyl ether, petroleum ether or the broader chemical class?",
                                                "kind": "boundary",
                                                "id": "two-ethyl-groups-linked-by-oxygen-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "authoritative-identity-links",
                                "name": "Authoritative identity links",
                                "description": "Connects the registry entry to verified substance records.",
                                "findings": [
                                    {
                                        "id": "identifier-agreement",
                                        "name": "Identifier agreement",
                                        "description": "External identifiers must resolve to the same structure and distinguish substance records from supplier products.",
                                        "questions": [
                                            {
                                                "text": "Which consulted records establish the CAS number, PubChem CID and EC number for diethyl ether?",
                                                "kind": "provenance",
                                                "id": "identifier-agreement-q01"
                                            },
                                            {
                                                "text": "Does each linked record describe the substance itself or a stabilized product or mixture?",
                                                "kind": "boundary",
                                                "id": "identifier-agreement-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "grade-and-composition",
                        "name": "Grade and composition",
                        "description": "Describes what accompanies diethyl ether in a sample and how its grade is established.",
                        "rationale": "Water, stabilizers and impurities can determine suitability even when molecular identity is correct.",
                        "layers": [
                            {
                                "id": "assay-and-water",
                                "name": "Assay and water",
                                "description": "Separates measured composition from grade names and label claims.",
                                "findings": [
                                    {
                                        "id": "sample-specific-purity",
                                        "name": "Sample-specific purity",
                                        "description": "Assay and water results need an explicit basis, method and link to the material being assessed.",
                                        "questions": [
                                            {
                                                "text": "What are the diethyl ether assay and water content, and on what measurement basis were they reported?",
                                                "kind": "measurement",
                                                "id": "sample-specific-purity-q01"
                                            },
                                            {
                                                "text": "Does the evidence describe this sample now, its unopened lot or only a generic supplier specification?",
                                                "kind": "provenance",
                                                "id": "sample-specific-purity-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "stabilizers-and-grade-claims",
                                "name": "Stabilizers and grade claims",
                                "description": "Records additives and the actual requirements behind a commercial grade.",
                                "findings": [
                                    {
                                        "id": "grade-does-not-determine-all-properties",
                                        "name": "Grade requirements and additive evidence",
                                        "description": "Anhydrous, stabilized and other grade designations require separate supporting specifications.",
                                        "questions": [
                                            {
                                                "text": "Which stabilizer, if any, is present, at what concentration and according to which evidence?",
                                                "kind": "measurement",
                                                "id": "grade-does-not-determine-all-properties-q01"
                                            },
                                            {
                                                "text": "Which specification defines the claimed grade, and which requirements remain unverified?",
                                                "kind": "definition",
                                                "id": "grade-does-not-determine-all-properties-q02"
                                            },
                                            {
                                                "text": "Are the documented water, stabilizer and impurity levels compatible with the intended application?",
                                                "kind": "action",
                                                "id": "grade-does-not-determine-all-properties-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "phase-and-solvent-behavior",
                        "name": "Phase and solvent behavior",
                        "description": "Relates physical state, volatility and solvent behavior to explicit conditions.",
                        "rationale": "Reference properties cannot support decisions reliably when pressure, temperature or sample composition are omitted.",
                        "layers": [
                            {
                                "id": "phase-and-volatility",
                                "name": "Phase and volatility",
                                "description": "Captures condition-dependent phase and vapor-generation evidence.",
                                "findings": [
                                    {
                                        "id": "conditioned-physical-properties",
                                        "name": "Physical properties with conditions",
                                        "description": "Phase, melting point, boiling point and vapor pressure must retain their reference conditions.",
                                        "questions": [
                                            {
                                                "text": "What phase is present at the recorded temperature and pressure?",
                                                "kind": "measurement",
                                                "id": "conditioned-physical-properties-q01"
                                            },
                                            {
                                                "text": "Which consulted sources establish melting point, boiling point and vapor pressure, including units and conditions?",
                                                "kind": "provenance",
                                                "id": "conditioned-physical-properties-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "solvent-system-interactions",
                                "name": "Solvent-system interactions",
                                "description": "Captures relevant density, solubility and phase behavior without owning an extraction procedure.",
                                "findings": [
                                    {
                                        "id": "mixture-specific-solvent-performance",
                                        "name": "Mixture-specific solvent performance",
                                        "description": "Solvent suitability depends on the solute and other phases, not merely the designation organic solvent.",
                                        "questions": [
                                            {
                                                "text": "What solubility or partition evidence applies to the intended solute and actual mixture composition?",
                                                "kind": "measurement",
                                                "id": "mixture-specific-solvent-performance-q01"
                                            },
                                            {
                                                "text": "Which density and mutual-solubility data support identifying phases at the intended temperature?",
                                                "kind": "provenance",
                                                "id": "mixture-specific-solvent-performance-q02"
                                            },
                                            {
                                                "text": "Which operational choices belong to a linked extraction or reaction model?",
                                                "kind": "boundary",
                                                "id": "mixture-specific-solvent-performance-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "peroxide-condition-and-history",
                        "name": "Peroxide condition and history",
                        "description": "Connects deterioration evidence to storage, opening and subsequent handling decisions.",
                        "rationale": "Diethyl ether's peroxide-forming behavior makes present condition a separate concern from initial purity.",
                        "layers": [
                            {
                                "id": "exposure-and-stabilization-history",
                                "name": "Exposure and stabilization history",
                                "description": "Records the history needed to interpret condition evidence.",
                                "findings": [
                                    {
                                        "id": "traceable-aging-context",
                                        "name": "Traceable aging context",
                                        "description": "Age, air and light exposure, and stabilizer information provide context without proving current peroxide concentration.",
                                        "questions": [
                                            {
                                                "text": "What receipt, opening and storage-exposure history is documented for this sample?",
                                                "kind": "provenance",
                                                "id": "traceable-aging-context-q01"
                                            },
                                            {
                                                "text": "What evidence supports the continuing relevance of the original stabilizer and quality declarations?",
                                                "kind": "provenance",
                                                "id": "traceable-aging-context-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "condition-evidence-and-use-restrictions",
                                "name": "Condition evidence and use restrictions",
                                "description": "Links peroxide assessment to an applicable decision rule.",
                                "findings": [
                                    {
                                        "id": "peroxide-assessment-with-limitations",
                                        "name": "Peroxide assessment with limitations",
                                        "description": "A reported peroxide result must retain its method, units, date and limitations; an unknown condition remains unknown.",
                                        "questions": [
                                            {
                                                "text": "What peroxide assessment exists, and what are its reporting basis, detection limits and sample applicability?",
                                                "kind": "measurement",
                                                "id": "peroxide-assessment-with-limitations-q01"
                                            },
                                            {
                                                "text": "Which authoritative procedure governs referral or restriction before handling or an operation that could concentrate residues?",
                                                "kind": "action",
                                                "id": "peroxide-assessment-with-limitations-q02"
                                            },
                                            {
                                                "text": "What unresolved history or condition evidence prevents a supported suitability decision?",
                                                "kind": "boundary",
                                                "id": "peroxide-assessment-with-limitations-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "hazards-and-authorized-use",
                        "name": "Hazards and authorized use",
                        "description": "Connects the material's documented hazards to jurisdiction and intended activity.",
                        "rationale": "Flammability, exposure and transport decisions require applicable evidence rather than an unqualified hazard label.",
                        "layers": [
                            {
                                "id": "hazard-and-exposure-evidence",
                                "name": "Hazard and exposure evidence",
                                "description": "Records classification and numerical criteria with their governing context.",
                                "findings": [
                                    {
                                        "id": "applicable-hazard-record",
                                        "name": "Applicable hazard record",
                                        "description": "Classification, ignition-related properties and exposure limits must identify the source, material and jurisdiction.",
                                        "questions": [
                                            {
                                                "text": "Which current classification and safety data sheet apply to this diethyl ether material in the relevant jurisdiction?",
                                                "kind": "provenance",
                                                "id": "applicable-hazard-record-q01"
                                            },
                                            {
                                                "text": "What flash-point and flammable-range data are supported, with methods, units and conditions?",
                                                "kind": "measurement",
                                                "id": "applicable-hazard-record-q02"
                                            },
                                            {
                                                "text": "Which exposure limits apply, with what averaging periods and legal or advisory status?",
                                                "kind": "definition",
                                                "id": "applicable-hazard-record-q03"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "application-and-disposition",
                                "name": "Application and disposition",
                                "description": "Uses identity, quality and condition evidence to qualify a proposed use or disposition.",
                                "findings": [
                                    {
                                        "id": "evidence-backed-use-decision",
                                        "name": "Evidence-backed use decision",
                                        "description": "Suitability is specific to the application and does not follow from historical use or substance identity alone.",
                                        "questions": [
                                            {
                                                "text": "Which application requirements are satisfied by the sample's grade, composition and current condition evidence?",
                                                "kind": "action",
                                                "id": "evidence-backed-use-decision-q01"
                                            },
                                            {
                                                "text": "Which transport or waste requirements apply to this material's actual composition and condition?",
                                                "kind": "action",
                                                "id": "evidence-backed-use-decision-q02"
                                            },
                                            {
                                                "text": "Does the proposed use require a separate clinical, process or facility assessment?",
                                                "kind": "boundary",
                                                "id": "evidence-backed-use-decision-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "evidence-and-external-alignment",
                        "name": "Evidence and external alignment",
                        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
                        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
                        "layers": [
                            {
                                "id": "reported-evidence",
                                "name": "Reported evidence",
                                "description": "Findings from the breadth pass, kept separate from the structural claims.",
                                "findings": [
                                    {
                                        "id": "evidence-confidence-notes",
                                        "name": "Check these first",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "This is recall without source consultation; numerical properties are approximate values for the pure substance.",
                                            "Verify current jurisdiction-specific hazard classifications, exposure limits and transport provisions before regulatory use.",
                                            "Grade names do not establish universal specifications; verify water content, purity, stabilizer identity and peroxide content for the supplied material."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-confidence-notes-q01",
                                                "text": "Which of these check these first hold for the sense of diethyl ether this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-kinds",
                                        "name": "Kinds and varieties",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Technical-grade diethyl ether",
                                            "Reagent-grade diethyl ether",
                                            "Anhydrous diethyl ether",
                                            "Stabilized diethyl ether containing a peroxide-inhibiting additive",
                                            "Unstabilized diethyl ether"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of diethyl ether this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-identifiers",
                                        "name": "Identifiers and schemes",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "scheme": "CAS Registry Number",
                                                "value_or_pattern": "60-29-7",
                                                "note": "Identifies diethyl ether as a substance, irrespective of commercial grade."
                                            },
                                            {
                                                "scheme": "PubChem CID",
                                                "value_or_pattern": "3283",
                                                "note": "Compound identifier for diethyl ether."
                                            },
                                            {
                                                "scheme": "EC number",
                                                "value_or_pattern": "200-467-2",
                                                "note": "European inventory identifier."
                                            },
                                            {
                                                "scheme": "UN dangerous goods number",
                                                "value_or_pattern": "UN 1155",
                                                "note": "Transport identity for diethyl ether (ethyl ether)."
                                            },
                                            {
                                                "scheme": "IUPAC nomenclature",
                                                "value_or_pattern": "Ethoxyethane",
                                                "note": "Systematic substitutive name."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-identifiers-q01",
                                                "text": "Which of these identifiers and schemes hold for the sense of diethyl ether this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-standards-and-regulation",
                                        "name": "Standards and regulation",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "United Nations Economic Commission for Europe: Globally Harmonized System of Classification and Labelling of Chemicals provides the hazard classification and communication framework.",
                                            "United Nations: Recommendations on the Transport of Dangerous Goods identify diethyl ether as UN 1155, Class 3, packing group I.",
                                            "European Union: the CLP Regulation governs substance classification, labelling and packaging.",
                                            "United States Occupational Safety and Health Administration: the Hazard Communication Standard governs workplace hazard communication."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-standards-and-regulation-q01",
                                                "text": "Which of these standards and regulation hold for the sense of diethyl ether this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-real-world-use",
                                        "name": "Real-world use",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Laboratory solvent for extraction and liquid-liquid partitioning.",
                                            "Solvent and coordinating medium for Grignard reagents and other moisture-sensitive organometallic chemistry.",
                                            "Ingredient in some engine-starting fluids.",
                                            "Historically used as an inhalational general anesthetic."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of diethyl ether this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-measurements",
                                        "name": "Typical measurements",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "quantity": "Molar mass",
                                                "typical_range": "74.12",
                                                "unit": "g/mol"
                                            },
                                            {
                                                "quantity": "Normal boiling point",
                                                "typical_range": "Approximately 34.6 at 101.325 kPa",
                                                "unit": "°C"
                                            },
                                            {
                                                "quantity": "Melting point",
                                                "typical_range": "Approximately -116",
                                                "unit": "°C"
                                            },
                                            {
                                                "quantity": "Liquid density",
                                                "typical_range": "Approximately 0.713 at 20 °C",
                                                "unit": "g/mL"
                                            },
                                            {
                                                "quantity": "Flash point",
                                                "typical_range": "Approximately -45; closed-cup measurement",
                                                "unit": "°C"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of diethyl ether this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-failure-modes-and-hazards",
                                        "name": "Failure modes and hazards",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Extremely flammable liquid; vapor readily forms ignitable mixtures with air.",
                                            "Vapor is heavier than air and can travel to ignition sources, causing flashback.",
                                            "Exposure to air during storage can generate explosive peroxides, which may become concentrated during evaporation or distillation.",
                                            "Inhalation can cause central nervous system depression, progressing from dizziness and drowsiness to unconsciousness at high exposure.",
                                            "High volatility can cause rapid pressure buildup in closed containers when heated."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of diethyl ether this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-regional-variation",
                                        "name": "Regional variation",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "Occupational exposure limits and their averaging periods differ between jurisdictions and issuing bodies.",
                                            "Required label wording and classifications depend on the jurisdiction's implementation of chemical hazard rules and the supplied formulation."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of diethyl ether this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    },
                                    {
                                        "id": "evidence-neighbours",
                                        "name": "Neighbouring kinds and how to tell them apart",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            {
                                                "name": "Ethers",
                                                "difference": "Ethers are the broader R-O-R' compound class; diethyl ether specifically has an ethyl group on each side of the oxygen."
                                            },
                                            {
                                                "name": "Dimethyl ether",
                                                "difference": "Has two methyl groups rather than two ethyl groups and is a gas at ordinary room temperature and atmospheric pressure."
                                            },
                                            {
                                                "name": "Ethanol",
                                                "difference": "Contains an O-H group and is an alcohol; diethyl ether has a C-O-C linkage and no O-H group."
                                            },
                                            {
                                                "name": "Tetrahydrofuran",
                                                "difference": "Is a cyclic ether and is miscible with water; diethyl ether is acyclic and has limited water solubility."
                                            },
                                            {
                                                "name": "Engine-starting fluid",
                                                "difference": "Is a formulated product that may contain diethyl ether alongside other ingredients, rather than the pure substance."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of diethyl ether this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Which existing Vercy publication, if any, already owns diethyl ether and should be linked instead of creating another model?",
                "Which authoritative records establish the registry cross-references and reference physical constants, and how should conflicting measurements be represented?",
                "Which grade specifications provide defensible limits for water, stabilizers and impurities in the intended applications?",
                "Which authoritative peroxide-assessment methods and decision rules apply to the intended setting, and how do they address unknown storage history?",
                "Which jurisdictions and activities must the first researched publication cover for hazard classification, exposure limits, transport and disposition?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 19,
                "questions": 34
            }
        },
        "draft": {
            "generator": "vr.draft.v3",
            "status": "draft-generated",
            "researched": false,
            "archetype": "chemical substance or material",
            "method": "Written from the archetype playbook - what this kind of thing needs beyond identity and provenance - and from the structure that recurred across 6,333 models already researched by two engines. Applied to this entry by rule. No source was read for this thing and no claim here is researched. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.",
            "facetsInferred": true,
            "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.",
            "purpose": "Give an agent a durable, checkable way to recognise a diethyl ether, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an agent to identify diethyl ether, assess the condition and suitability of a particular sample, and determine which uses require additional evidence or controls.",
            "characteristics": {
                "substance": "material",
                "origin": "natural",
                "agency": "inert",
                "mobility": "varies"
            },
            "whatYouCanDoWithIt": [
                "observed and measured",
                "consumed or used up"
            ],
            "distinguishingFeatures": [
                "Described in 66 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is."
            ],
            "openQuestionsForResearch": [
                "Which of the bundles below does a real task actually need, and which are ceremony?",
                "What does this thing have that the facets do not capture at all?",
                "Which neighbouring kind is most often confused with a diethyl ether, and on what evidence are they told apart?"
            ],
            "whatItIsMadeOf": "matter you can touch",
            "physicalCharacter": [
                "Mobility varies between examples.",
                "Does nothing on its own; everything it does, something else did to it.",
                "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing."
            ],
            "whatCanBeDoneWithIt": [
                "observe it, measure it, record its state",
                "use it up, and then need more of it"
            ],
            "howItIsRecognised": [
                "Not recognisable by sight in any reliable way. Appearance varies with grade, form and additives; identification is by label, by documentation, or by assay."
            ],
            "relatedModels": [],
            "standing": "Described in 66 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is.",
            "structure": {
                "bundles": [
                    {
                        "id": "identity-and-classification",
                        "name": "Identity, naming and classification",
                        "description": "How an agent tells one diethyl ether from another, and a diethyl ether from things that resemble it.",
                        "rationale": "Recognition comes before every other claim. Without stable identity nothing else in the model can be trusted to be about the same thing twice.",
                        "layers": [
                            {
                                "id": "naming-and-identifiers",
                                "name": "Names and identifiers",
                                "description": "The names this thing goes by and the identifiers that survive translation and time.",
                                "findings": [
                                    {
                                        "id": "preferred-name-and-aliases",
                                        "name": "Preferred name, aliases and local names",
                                        "description": "Which name to use, which names mean the same thing, and which merely sound similar.",
                                        "questions": [
                                            {
                                                "id": "preferred-name-and-aliases-q01",
                                                "text": "What identifies and describes the name of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "preferred-name-and-aliases-q02",
                                                "text": "Who or what asserted this about the name of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "preferred-name-and-aliases-q03",
                                                "text": "What may an agent decide or do once the name of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    },
                                    {
                                        "id": "stable-identifiers",
                                        "name": "Stable identifiers and external keys",
                                        "description": "Identifiers that keep pointing at this kind of thing across systems and languages.",
                                        "questions": [
                                            {
                                                "id": "stable-identifiers-q01",
                                                "text": "What identifies and describes an identifier for a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "stable-identifiers-q02",
                                                "text": "Who or what asserted this about an identifier for a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "stable-identifiers-q03",
                                                "text": "What may an agent decide or do once an identifier for a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "classification-and-granularity",
                                "name": "Classification and granularity",
                                "description": "Where a diethyl ether sits among kinds, and how finely a task needs to cut it.",
                                "findings": [
                                    {
                                        "id": "kind-and-parents",
                                        "name": "Kind, parents and neighbouring kinds",
                                        "description": "The classes this thing belongs to and the ones it is next to.",
                                        "questions": [
                                            {
                                                "id": "kind-and-parents-q01",
                                                "text": "What identifies and describes the kind of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "kind-and-parents-q02",
                                                "text": "Who or what asserted this about the kind of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "kind-and-parents-q03",
                                                "text": "What may an agent decide or do once the kind of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    },
                                    {
                                        "id": "distinguishing-features",
                                        "name": "Distinguishing features",
                                        "description": "What separates a diethyl ether from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "distinguishing-features-q02",
                                                "text": "Who or what asserted this about what distinguishes a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "distinguishing-features-q03",
                                                "text": "What may an agent decide or do once what distinguishes a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "form-and-composition",
                        "name": "Form, composition and condition",
                        "description": "What a diethyl ether is made of, what shape and size it takes, and what state it is in.",
                        "rationale": "A physical thing can be measured, and a model that cannot record its measurements cannot support any decision that depends on them.",
                        "layers": [
                            {
                                "id": "form-and-dimensions",
                                "name": "Form and dimensions",
                                "description": "Shape, size, mass and the ranges these take across examples.",
                                "findings": [
                                    {
                                        "id": "measurable-dimensions",
                                        "name": "Measurable dimensions and their units",
                                        "description": "The quantities worth recording and the units they are recorded in.",
                                        "questions": [
                                            {
                                                "id": "measurable-dimensions-q01",
                                                "text": "What identifies and describes the dimensions of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "measurable-dimensions-q02",
                                                "text": "Who or what asserted this about the dimensions of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "measurable-dimensions-q03",
                                                "text": "What may an agent decide or do once the dimensions of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "material-and-composition",
                                "name": "Material and composition",
                                "description": "Materials, parts and how they are put together.",
                                "findings": [
                                    {
                                        "id": "parts-and-materials",
                                        "name": "Parts and materials",
                                        "description": "What a diethyl ether is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "parts-and-materials-q02",
                                                "text": "Who or what asserted this about the composition of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "parts-and-materials-q03",
                                                "text": "What may an agent decide or do once the composition of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "condition-and-integrity",
                                "name": "Condition and integrity",
                                "description": "Wear, damage, health and the difference between working and broken.",
                                "findings": [
                                    {
                                        "id": "condition-assessment",
                                        "name": "Condition, damage and health",
                                        "description": "How the condition of a diethyl ether is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "condition-assessment-q02",
                                                "text": "Who or what asserted this about the condition of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "condition-assessment-q03",
                                                "text": "What may an agent decide or do once the condition of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "place-and-movement",
                        "name": "Place and movement",
                        "description": "Where a diethyl ether is, how it got there and where it may go (varies).",
                        "rationale": "A thing that can move needs its position recorded with a time, or every later claim about it is about a place it has left.",
                        "layers": [
                            {
                                "id": "location-and-placement",
                                "name": "Location and placement",
                                "description": "Position, containment and the reference frame the position is given in.",
                                "findings": [
                                    {
                                        "id": "position-and-frame",
                                        "name": "Position, container and reference frame",
                                        "description": "Where a diethyl ether is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "position-and-frame-q02",
                                                "text": "Who or what asserted this about the location of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "position-and-frame-q03",
                                                "text": "What may an agent decide or do once the location of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "movement-and-transfer",
                                "name": "Movement and transfer",
                                "description": "How a diethyl ether is carried, installed or relocated.",
                                "findings": [
                                    {
                                        "id": "movement-events",
                                        "name": "Movement events and constraints",
                                        "description": "What counts as a movement, what records it and what limits it.",
                                        "questions": [
                                            {
                                                "id": "movement-events-q01",
                                                "text": "What identifies and describes the movement of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "movement-events-q02",
                                                "text": "Who or what asserted this about the movement of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "movement-events-q03",
                                                "text": "What may an agent decide or do once the movement of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "state-and-lifecycle",
                        "name": "State and lifecycle",
                        "description": "The states a diethyl ether passes through and the events that move it between them.",
                        "rationale": "Most decisions about a thing depend on what state it is in now, which is a claim with a time on it, not a property.",
                        "layers": [
                            {
                                "id": "lifecycle-stages",
                                "name": "Lifecycle stages",
                                "description": "From coming into existence to ceasing to be one of these.",
                                "findings": [
                                    {
                                        "id": "stages-and-transitions",
                                        "name": "Stages and transitions",
                                        "description": "The stages worth naming and what moves a diethyl ether between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "stages-and-transitions-q02",
                                                "text": "Who or what asserted this about the lifecycle of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "stages-and-transitions-q03",
                                                "text": "What may an agent decide or do once the lifecycle of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "observations-and-status",
                                "name": "Observations and current status",
                                "description": "What is observed about a diethyl ether, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a diethyl ether is recorded so that it can be superseded rather than overwritten.",
                                        "questions": [
                                            {
                                                "id": "observation-record-q01",
                                                "text": "What identifies and describes an observation of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "observation-record-q02",
                                                "text": "Who or what asserted this about an observation of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "observation-record-q03",
                                                "text": "What may an agent decide or do once an observation of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "use-and-operation",
                        "name": "Use and operation",
                        "description": "What can be done with a diethyl ether and what it takes to do it.",
                        "rationale": "An agent that can recognise a thing but not act on it has only half a model.",
                        "layers": [
                            {
                                "id": "intended-use",
                                "name": "Intended use and function",
                                "description": "What a diethyl ether is for, and what it is used for anyway.",
                                "findings": [
                                    {
                                        "id": "function-and-purpose",
                                        "name": "Function, purpose and misuse",
                                        "description": "The function a diethyl ether performs and the uses that fall outside it.",
                                        "questions": [
                                            {
                                                "id": "function-and-purpose-q01",
                                                "text": "What identifies and describes the use of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "function-and-purpose-q02",
                                                "text": "Who or what asserted this about the use of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "function-and-purpose-q03",
                                                "text": "What may an agent decide or do once the use of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "handling-and-procedure",
                                "name": "Handling and procedure",
                                "description": "The steps, skills and tools involved in using a diethyl ether.",
                                "findings": [
                                    {
                                        "id": "procedures-and-skills",
                                        "name": "Procedures, skills and required tools",
                                        "description": "What an agent needs before it can act on a diethyl ether at all.",
                                        "questions": [
                                            {
                                                "id": "procedures-and-skills-q01",
                                                "text": "What identifies and describes handling a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "procedures-and-skills-q02",
                                                "text": "Who or what asserted this about handling a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "procedures-and-skills-q03",
                                                "text": "What may an agent decide or do once handling a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "supply-and-consumption",
                                "name": "Supply and consumption",
                                "description": "Quantities, rates and what running out means.",
                                "findings": [
                                    {
                                        "id": "consumption-and-stock",
                                        "name": "Consumption, stock and replenishment",
                                        "description": "How much of a diethyl ether there is and how fast it goes.",
                                        "questions": [
                                            {
                                                "id": "consumption-and-stock-q01",
                                                "text": "What identifies and describes the supply of a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "consumption-and-stock-q02",
                                                "text": "Who or what asserted this about the supply of a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "consumption-and-stock-q03",
                                                "text": "What may an agent decide or do once the supply of a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "composition-and-identity",
                        "name": "Composition, grade and chemical identity",
                        "description": "What diethyl ether is made of and how pure the thing in hand is.",
                        "rationale": "Grade decides what a substance may be used for, so a model that records only the name cannot support any decision about use.",
                        "layers": [
                            {
                                "id": "chemical-identity",
                                "name": "Chemical identity",
                                "description": "Formula, structure and the registry numbers that name it unambiguously.",
                                "findings": [
                                    {
                                        "id": "identity-record",
                                        "name": "Identity and registry numbers",
                                        "description": "What identifies this substance across suppliers and regulators.",
                                        "questions": [
                                            {
                                                "id": "identity-record-q01",
                                                "text": "What formula, structure and registry identifiers name diethyl ether unambiguously?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "identity-record-q02",
                                                "text": "Which related substances share a name in common use but not an identifier?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "grade-and-impurities",
                                "name": "Grade, purity and impurities",
                                "description": "The specification a batch meets and what else is in it.",
                                "findings": [
                                    {
                                        "id": "specification",
                                        "name": "Specification and assay",
                                        "description": "How purity is stated and measured, and which impurities matter.",
                                        "questions": [
                                            {
                                                "id": "specification-q01",
                                                "text": "What grades of diethyl ether exist, how is purity assayed, and which impurities are limited?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "specification-q02",
                                                "text": "Which use requires which grade, and what happens when a lower grade is substituted?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "properties-and-behaviour",
                        "name": "Properties and behaviour",
                        "description": "How diethyl ether behaves under conditions an agent can measure or change.",
                        "rationale": "Physical constants are the part of a substance model that transfers between contexts, and each needs its unit and its conditions.",
                        "layers": [
                            {
                                "id": "physical-constants",
                                "name": "Physical constants",
                                "description": "Values that hold for the pure substance, with their conditions.",
                                "findings": [
                                    {
                                        "id": "constants-record",
                                        "name": "Constants and conditions",
                                        "description": "The quantities worth recording and the state they apply in.",
                                        "questions": [
                                            {
                                                "id": "constants-record-q01",
                                                "text": "What are the defining physical constants of diethyl ether, in what units and under what conditions?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "constants-record-q02",
                                                "text": "Which of these values change with grade or form rather than being fixed?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "stability-and-reactivity",
                                "name": "Stability and reactivity",
                                "description": "What it reacts with, degrades into, and how it is stored.",
                                "findings": [
                                    {
                                        "id": "incompatibilities",
                                        "name": "Incompatibilities and degradation",
                                        "description": "What must not meet it, and what it becomes over time.",
                                        "questions": [
                                            {
                                                "id": "incompatibilities-q01",
                                                "text": "What is diethyl ether incompatible with, and what does it degrade into under storage?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "incompatibilities-q02",
                                                "text": "What storage and handling does that require, and who is competent to do it?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "hazard-and-regulation",
                        "name": "Hazard classification and regulation",
                        "description": "How diethyl ether can harm, and what the law says about holding and moving it.",
                        "rationale": "A substance model without its hazard class and its regulatory identity is unusable in exactly the situations that matter.",
                        "layers": [
                            {
                                "id": "hazard-class",
                                "name": "Hazard classification",
                                "description": "Classified hazards, exposure limits and protective measures.",
                                "findings": [
                                    {
                                        "id": "classified-hazards",
                                        "name": "Classified hazards and limits",
                                        "description": "The classification, the scheme it belongs to, and the limits set.",
                                        "questions": [
                                            {
                                                "id": "classified-hazards-q01",
                                                "text": "How is diethyl ether classified for hazard, under which scheme, and what exposure limits apply?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "classified-hazards-q02",
                                                "text": "What protection does handling require, and what must an agent refuse to do without it?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "regulatory-identity",
                                "name": "Regulatory identity and control",
                                "description": "Registration, restriction and transport rules by jurisdiction.",
                                "findings": [
                                    {
                                        "id": "controls",
                                        "name": "Controls and jurisdiction",
                                        "description": "Where it is restricted and what the restriction attaches to.",
                                        "questions": [
                                            {
                                                "id": "controls-q01",
                                                "text": "Which registrations, restrictions or transport rules cover diethyl ether, and where?",
                                                "kind": "provenance"
                                            },
                                            {
                                                "id": "controls-q02",
                                                "text": "Does the control attach to the substance, its concentration, or its intended use?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "provenance-and-evidence",
                        "name": "Provenance, evidence and time",
                        "description": "Where every claim about a diethyl ether came from and when it held.",
                        "rationale": "A claim without a source and a time cannot be superseded, only overwritten, and an agent that overwrites loses the ability to explain itself.",
                        "layers": [
                            {
                                "id": "source-and-authority",
                                "name": "Source and authority",
                                "description": "Who said it, on what evidence, and how strongly.",
                                "findings": [
                                    {
                                        "id": "claim-provenance",
                                        "name": "Claim provenance and confidence",
                                        "description": "The authority behind each claim about a diethyl ether and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "claim-provenance-q02",
                                                "text": "Who or what asserted this about a claim about a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "claim-provenance-q03",
                                                "text": "What may an agent decide or do once a claim about a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "time-and-versions",
                                "name": "Time, versions and supersession",
                                "description": "When a claim was true, when it was learnt, and what replaced it.",
                                "findings": [
                                    {
                                        "id": "validity-and-supersession",
                                        "name": "Validity period and supersession",
                                        "description": "How an old claim about a diethyl ether is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a diethyl ether, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "validity-and-supersession-q02",
                                                "text": "Who or what asserted this about the validity of a claim about a diethyl ether, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "validity-and-supersession-q03",
                                                "text": "What may an agent decide or do once the validity of a claim about a diethyl ether is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "statistics": {
                "bundles": 9,
                "layers": 20,
                "findings": 22,
                "questions": 60
            }
        }
    }
}