{ "model": { "rank": 6346, "code": "thing-q207442", "model_id": "vr.tr.silver-nitrate", "name": "silver nitrate", "purpose": "Enable an AI agent to recognise silver nitrate, assess the identity and condition of a particular material, and determine whether its documented composition and handling constraints permit an intended use.", "family": "Thing Registry", "category": "Physical world and living systems", "status": "research-draft", "kind": "thing", "plane": "PHY", "domain": "PHY.MAT", "industry": "", "version": "", "url": "/models/thing/q207442/", "tier": 2, "score": 61, "payload": { "layer": "wikidata", "aliases": [], "aliasCount": 0, "merged": 0, "knownIn": 61, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q207442", "url": "https://www.wikidata.org/wiki/Q207442", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-07T13:57:57Z", "providers": [ "Codex", "Grok" ], "missingProviders": [], "pass": 2, "cost": { "grok": { "usd": 0.00792948, "turns": 1, "seconds": 121.6, "error": null }, "codex": { "seconds": 79.4, "error": "Reading additional input from stdin...\nOpenAI Codex v0.153.3\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: 01a07c25-8dd2-7c71-8698-3c7bb158fa17\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: silver nitrate\nRegistry id: vr.tr.silver-nitrate\nPlane / domain: PHY / PHY.MAT\nRegistry definition: (none recorded)\nNames folded into this entry: (no" } } }, "metaModel": { "id": "THING-Q207442", "registryId": "vr.tr.silver-nitrate", "name": "silver nitrate", "version": "0.1.0-research.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "PHY.MAT" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q207442/", "model": { "registry_id": "vr.tr.silver-nitrate", "name": "silver nitrate", "purpose": "Enable an AI agent to recognise silver nitrate, assess the identity and condition of a particular material, and determine whether its documented composition and handling constraints permit an intended use.", "definition": "Silver nitrate is the anhydrous ionic salt AgNO₃ of silver(I), a colourless-to-white, photosensitive, water-soluble oxidizer that is the principal commercial and laboratory source of aqueous Ag⁺ for precipitation, reduction to metal, and caustic or antimicrobial action.", "scope_statement": "This model owns silver nitrate as the chemical substance AgNO3 and its presence in identified lots, solids and solutions, including composition, condition, functional suitability and material-specific constraints.", "in_scope": [ "Chemical identity and evidence distinguishing silver nitrate from other silver compounds and nitrate salts", "Lot-specific purity, impurities and analytical certification", "Solid form or solution composition, including concentration and solvent", "Condition changes associated with light exposure, contamination or loss of containment", "Suitability for uses requiring silver ions, nitrate or a specified silver nitrate grade", "Material-specific storage, compatibility, exposure and waste constraints" ], "out_of_scope": [ "Silver mining, refining and the upstream manufacture of silver nitrate", "Complete formulations in which silver nitrate is one ingredient", "Clinical diagnosis, treatment selection and patient outcomes", "Laboratory methods, instrument operation and experimental workflows", "Facility-wide chemical safety systems and waste-treatment infrastructure", "Separate models of metallic silver, silver chloride and other reaction products" ], "distinguishing_features": [ "Identity evidence must establish AgNO3, rather than merely identifying a silver-containing material or a nitrate-containing salt.", "Silver nitrate is water-soluble; a predominantly insoluble silver-containing solid requires investigation for compounds such as silver chloride or for contamination.", "Evidence for silver ions alone cannot distinguish silver nitrate from another soluble silver salt; nitrate identity and composition must also be supported.", "A clear solution or white crystalline appearance is insufficient identification because many unrelated salts have these appearances.", "A labelled silver nitrate solution must be distinguished from pure solid AgNO3 and from mixtures such as ammoniacal silver reagents; solvent, concentration and additional constituents change its classification and permitted uses." ], "characteristics": [ { "name": "Chemical identity", "kind": "category", "unit_or_values": "AgNO3; identity supported, provisional or disputed", "why_it_matters": "Prevents substitution of another silver compound or nitrate salt." }, { "name": "Material presentation", "kind": "category", "unit_or_values": "Crystalline solid, aqueous solution, other specified preparation or unknown", "why_it_matters": "Determines which composition, condition and handling questions apply." }, { "name": "Silver nitrate assay", "kind": "measurement", "unit_or_values": "Mass fraction or percentage, with analytical method and reporting basis", "why_it_matters": "Establishes how much of a solid sample is attributable to silver nitrate." }, { "name": "Solution concentration", "kind": "measurement", "unit_or_values": "mol/L, g/L or mass fraction, with temperature where relevant and an explicit analyte basis", "why_it_matters": "Supports quantitative use and prevents confusion between silver content and silver nitrate content." }, { "name": "Solvent and additional constituents", "kind": "category", "unit_or_values": "Named solvent, additives and other solutes, with known amounts or unknown status", "why_it_matters": "Distinguishes simple silver nitrate solutions from formulations whose chemistry and constraints differ." }, { "name": "Impurity profile", "kind": "measurement", "unit_or_values": "Named impurities in mg/kg, mg/L or another stated basis, including detection limits", "why_it_matters": "Trace constituents can affect precipitation, analytical performance and suitability." }, { "name": "Observed appearance", "kind": "state", "unit_or_values": "Recorded colour, clarity, precipitate, deposits and crystal condition, with observation date", "why_it_matters": "Provides evidence of change without treating appearance as conclusive identification." }, { "name": "Exposure history", "kind": "state", "unit_or_values": "Documented light, temperature, moisture and contamination exposure; unknown intervals identified", "why_it_matters": "Helps interpret condition changes and decide whether reassessment is necessary." }, { "name": "Lot and certificate linkage", "kind": "relation", "unit_or_values": "Supplier, batch identifier, certificate of analysis and matching container", "why_it_matters": "Connects composition claims to the actual material being assessed." }, { "name": "Application-specific suitability", "kind": "state", "unit_or_values": "Supported, conditional, unassessed or rejected for a named use", "why_it_matters": "Avoids treating chemical identity as sufficient evidence of fitness for every application." }, { "name": "Applicable hazard evidence", "kind": "relation", "unit_or_values": "Current safety data and classification for the actual form, concentration and jurisdiction", "why_it_matters": "Grounds handling decisions in the preparation being used." } ], "affordances": [ "Verify a material's silver nitrate identity against its label, lot records and analytical evidence.", "Compare its assay, concentration and impurities with a named application's acceptance criteria.", "Calculate silver nitrate or silver content from a quantity when composition and reporting basis are established.", "Identify condition changes that require segregation, reassessment or rejection before use.", "Evaluate proposed storage, transfer and contact materials against documented compatibility constraints.", "Route remaining material and contaminated items to an appropriate silver-containing waste process." ] }, "sources": [ { "id": "pubchem-24470", "title": "PubChem Compound Summary for CID 24470, Silver nitrate - National Library of Medicine (NIH)", "url": "https://pubchem.ncbi.nlm.nih.gov/compound/24470", "what_it_supports": "Identity (formula, CAS, InChIKey, UNII), physical constants, hazard classes, and common uses.", "url_status": "live" }, { "id": "icsc-1116", "title": "International Chemical Safety Card 1116: Silver nitrate - ILO / WHO / IPCS", "url": "", "what_it_supports": "Occupational hazards, oxidizer and corrosive behaviour, incompatibilities (ammonia, combustibles), and fire decomposition products." }, { "id": "usp-agno3", "title": "USP-NF monograph Silver Nitrate (and related Toughened Silver Nitrate practice) - United States Pharmacopeia", "url": "", "what_it_supports": "Medicinal identity, assay expectation, and the distinction between crystalline pharmacopoeial salt and fused stick presentations." }, { "id": "echa-agno3", "title": "REACH registered-substance information for silver nitrate (EC 231-853-9) - European Chemicals Agency", "url": "", "what_it_supports": "EC number, CLP classification as oxidizer/corrosive/aquatic toxicant, and EU supply regulation." } ], "structure": { "bundles": [ { "id": "silver-nitrate-identity", "name": "Silver nitrate identity", "description": "Evidence that the material is AgNO3 and that its physical presentation is correctly identified.", "rationale": "Silver-bearing materials, nitrate salts and formulated silver reagents must not be treated as interchangeable.", "layers": [ { "id": "compound-identification", "name": "Compound identification", "description": "Establishes the chemical identity beyond appearance or an incomplete constituent test.", "findings": [ { "id": "silver-and-nitrate-evidence", "name": "Silver and nitrate evidence", "description": "Records the basis for assigning AgNO3 identity and the limits of that evidence.", "questions": [ { "text": "What documentation or analytical evidence establishes silver nitrate rather than only silver or nitrate?", "kind": "definition", "id": "silver-and-nitrate-evidence-q01" }, { "text": "Which plausible alternatives, including other silver salts, remain unresolved by that evidence?", "kind": "boundary", "id": "silver-and-nitrate-evidence-q02" } ] } ] }, { "id": "substance-and-preparation", "name": "Substance and preparation", "description": "Separates silver nitrate itself from solutions and mixtures containing it.", "findings": [ { "id": "preparation-boundary", "name": "Preparation boundary", "description": "Identifies the physical form and additional constituents relevant to interpreting the material.", "questions": [ { "text": "Is this material solid AgNO3, a solution in a named solvent or a multicomponent preparation?", "kind": "definition", "id": "preparation-boundary-q01" }, { "text": "Do additives or complexing constituents require a linked formulation model to govern its behaviour?", "kind": "boundary", "id": "preparation-boundary-q02" } ] } ] } ] }, { "id": "composition-and-quantity", "name": "Composition and quantity", "description": "The amount of silver nitrate present and the chemical constituents that affect its use.", "rationale": "Assay, concentration and impurity evidence determine the available silver nitrate and whether quantitative use is defensible.", "layers": [ { "id": "assay-and-concentration", "name": "Assay and concentration", "description": "Establishes silver nitrate content on an explicit and applicable measurement basis.", "findings": [ { "id": "content-basis", "name": "Content basis", "description": "Makes solid assay and solution concentration interpretable without confusing Ag with AgNO3.", "questions": [ { "text": "What assay or concentration was measured, by which method, on what date and with what uncertainty?", "kind": "measurement", "id": "content-basis-q01" }, { "text": "Is the reported value expressed as AgNO3, elemental silver or another basis, and what conditions qualify it?", "kind": "definition", "id": "content-basis-q02" } ] } ] }, { "id": "impurities-and-certification", "name": "Impurities and certification", "description": "Relates grade claims and measured contaminants to the particular lot.", "findings": [ { "id": "lot-specific-composition", "name": "Lot-specific composition", "description": "Captures impurity evidence, including constituents capable of altering silver-ion availability.", "questions": [ { "text": "Which impurities, including chloride where relevant, were assessed, and what results and detection limits were reported?", "kind": "measurement", "id": "lot-specific-composition-q01" }, { "text": "Does the certificate of analysis match this lot and support the stated grade against a named specification?", "kind": "provenance", "id": "lot-specific-composition-q02" } ] } ] } ] }, { "id": "condition-and-change", "name": "Condition and change", "description": "Observed material state and evidence of changes during storage or use.", "rationale": "A valid original identity or certificate does not establish that exposed, contaminated or altered material remains suitable.", "layers": [ { "id": "appearance-and-exposure", "name": "Appearance and exposure", "description": "Connects observed changes with documented storage and exposure history.", "findings": [ { "id": "discolouration-and-deposits", "name": "Discolouration and deposits", "description": "Records colour changes, turbidity or deposits without assigning an unverified cause.", "questions": [ { "text": "Has the solid or solution changed colour, developed deposits or become turbid relative to its documented initial state?", "kind": "measurement", "id": "discolouration-and-deposits-q01" }, { "text": "What light exposure, container contact or contamination events could help explain the change?", "kind": "provenance", "id": "discolouration-and-deposits-q02" } ] } ] }, { "id": "composition-drift", "name": "Composition drift", "description": "Assesses whether changes in water content, solvent quantity or chemical state undermine prior measurements.", "findings": [ { "id": "continued-validity-of-content", "name": "Continued validity of content", "description": "Determines whether historical assay or concentration evidence still represents the material.", "questions": [ { "text": "Could moisture exposure, evaporation, precipitation or contamination have changed the composition since its last measurement?", "kind": "boundary", "id": "continued-validity-of-content-q01" }, { "text": "What evidence is required to accept, remeasure or reject this material for its next intended use?", "kind": "action", "id": "continued-validity-of-content-q02" } ] } ] } ] }, { "id": "silver-ion-function-and-use", "name": "Silver-ion function and use", "description": "Relates silver nitrate composition to the chemical function required by a specific application.", "rationale": "Total silver nitrate content alone does not establish useful silver-ion behaviour in the presence of reactive or complexing constituents.", "layers": [ { "id": "chemical-role", "name": "Chemical role", "description": "Identifies the function for which silver nitrate is selected.", "findings": [ { "id": "required-reactivity", "name": "Required reactivity", "description": "Distinguishes uses based on silver-ion reactions from those requiring other properties of the material.", "questions": [ { "text": "Does the intended use require silver-ion precipitation, a silver precursor or another explicitly defined function?", "kind": "definition", "id": "required-reactivity-q01" }, { "text": "Which constituents in the receiving material could precipitate, complex or reduce silver and change that function?", "kind": "boundary", "id": "required-reactivity-q02" } ] } ] }, { "id": "fitness-for-application", "name": "Fitness for application", "description": "Compares the available evidence with requirements for a named use.", "findings": [ { "id": "use-acceptance", "name": "Use acceptance", "description": "Records a bounded suitability decision rather than a universal claim of usability.", "questions": [ { "text": "What grade, assay, impurity limits and concentration verification does the intended application require?", "kind": "boundary", "id": "use-acceptance-q01" }, { "text": "Does this lot meet those requirements, and what unresolved evidence prevents a decision?", "kind": "action", "id": "use-acceptance-q02" } ] } ] } ] }, { "id": "handling-and-material-fate", "name": "Handling and material fate", "description": "Material-specific constraints on containment, contact, exposure and disposal.", "rationale": "Silver nitrate's oxidizing properties and silver-containing residues require decisions grounded in the actual preparation and its documented hazards.", "layers": [ { "id": "containment-and-compatibility", "name": "Containment and compatibility", "description": "Establishes acceptable storage and material contacts for the identified form and concentration.", "findings": [ { "id": "storage-and-contact-constraints", "name": "Storage and contact constraints", "description": "Records applicable light protection, container compatibility and chemical segregation requirements.", "questions": [ { "text": "What storage conditions and container materials are supported by safety and supplier documentation for this preparation?", "kind": "provenance", "id": "storage-and-contact-constraints-q01" }, { "text": "Does a proposed transfer or storage arrangement introduce incompatible contact, contamination or inadequate light protection?", "kind": "action", "id": "storage-and-contact-constraints-q02" } ] } ] }, { "id": "exposure-and-residues", "name": "Exposure and residues", "description": "Connects preparation-specific exposure constraints with the fate of unused material and contaminated items.", "findings": [ { "id": "exposure-and-waste-routing", "name": "Exposure and waste routing", "description": "Supports handling and waste decisions using applicable evidence for silver nitrate and silver-bearing residues.", "questions": [ { "text": "Which exposure controls and response requirements apply to this solid or solution under its current safety documentation?", "kind": "action", "id": "exposure-and-waste-routing-q01" }, { "text": "Which authorised waste route accepts its silver content, nitrate content and any additional contaminants?", "kind": "action", "id": "exposure-and-waste-routing-q02" } ] } ] } ] }, { "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-kinds", "name": "Kinds and varieties", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "ACS/reagent-grade crystals for analysis and synthesis", "Pharmacopoeial (USP/Ph. Eur.) silver nitrate for medicinal manufacture", "Toughened/fused sticks or pencils (AgNO₃ fused with KNO₃) for topical cauterization", "Specified aqueous solutions (commonly 0.5-20% w/v) for ophthalmology, wound care, and lab use", "Technical/industrial grade for silver-salt manufacture, plating, and mirroring", "Photographic-grade material specified for low heavy-metal and organic residue", "High-purity (≥99.9%) lots for assay standards and electronics" ], "questions": [ { "id": "evidence-kinds-q01", "text": "Which of these kinds and varieties hold for the sense of silver nitrate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-identifiers", "name": "Identifiers and schemes", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "scheme": "CAS Registry Number", "value_or_pattern": "7761-88-8", "note": "Anhydrous AgNO₃." }, { "scheme": "EC / EINECS", "value_or_pattern": "231-853-9", "note": "EU inventory number." }, { "scheme": "Wikidata", "value_or_pattern": "Q207758", "note": "Item for silver nitrate." }, { "scheme": "PubChem CID", "value_or_pattern": "24470", "note": "" }, { "scheme": "UNII", "value_or_pattern": "95IT3W8JZE", "note": "FDA substance identifier." }, { "scheme": "UN number", "value_or_pattern": "UN1493", "note": "Transport of solid silver nitrate; Class 5.1 oxidizer." }, { "scheme": "InChIKey", "value_or_pattern": "SQGYOTSLMSWVJD-UHFFFAOYSA-N", "note": "" }, { "scheme": "ATC", "value_or_pattern": "D08AL01", "note": "Silver nitrate as a dermatological antiseptic." }, { "scheme": "HS / Harmonized System", "value_or_pattern": "2843.21", "note": "Heading for silver nitrate in trade statistics." }, { "scheme": "ICSC", "value_or_pattern": "1116", "note": "International Chemical Safety Card number." }, { "scheme": "RTECS", "value_or_pattern": "VW4725000", "note": "" } ], "questions": [ { "id": "evidence-identifiers-q01", "text": "Which of these identifiers and schemes hold for the sense of silver nitrate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-standards-and-regulation", "name": "Standards and regulation", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "USP-NF monograph Silver Nitrate (United States Pharmacopeia)", "European Pharmacopoeia monograph Silver nitrate (EDQM)", "ACS Reagent Chemicals specification for silver nitrate (American Chemical Society)", "CLP/GHS classification and REACH registration for EC 231-853-9 (ECHA / EU)", "UN Model Regulations / ADR/IMDG/IATA: UN1493, Class 5.1 oxidizer (UNECE and modal agencies)", "OSHA Hazard Communication Standard classification as oxidizer and corrosive (United States)", "Historical public-health rules for Credé 1% silver nitrate prophylaxis against neonatal gonococcal ophthalmia, now replaced in many jurisdictions by antibiotic ointment (national health ministries / CDC-type bodies)" ], "questions": [ { "id": "evidence-standards-and-regulation-q01", "text": "Which of these standards and regulation hold for the sense of silver nitrate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-real-world-use", "name": "Real-world use", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Mohr (and related argentometric) titration of chloride, bromide, and cyanide in water, food, and process labs", "Starting material for other silver salts, photographic halides, and electroless silvering of glass and plastics", "Fused sticks applied to hypertrophic granulation, umbilical granuloma, and minor epistaxis", "Historic 1% eye-drop prophylaxis (Credé) against neonatal ophthalmia; still referenced, rarely first-line", "Histological silver stains (e.g. von Kossa, Golgi-type impregnation) where Ag⁺ is reduced onto tissue", "Industrial and decorative silvering and some conductive-ink / electronics precursor routes" ], "questions": [ { "id": "evidence-real-world-use-q01", "text": "Which of these real-world use hold for the sense of silver nitrate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-measurements", "name": "Typical measurements", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "quantity": "Assay as AgNO₃ (dry basis)", "typical_range": "99.0-99.9 (reagent/pharmacopoeial); technical lots may be lower", "unit": "% m/m" }, { "quantity": "Melting point", "typical_range": "209-212", "unit": "°C" }, { "quantity": "Solid density (20 °C)", "typical_range": "4.35", "unit": "g·cm⁻³" }, { "quantity": "Aqueous solubility", "typical_range": "~122 (0 °C); ~245-256 (20-25 °C); rises steeply toward 100 °C", "unit": "g/100 mL water" }, { "quantity": "Topical solution strength", "typical_range": "0.5-20 (1% historic ophthalmic; 10-20% common caustic solutions)", "unit": "% w/v" }, { "quantity": "Toughened-stick AgNO₃ content", "typical_range": "75 (many commercial applicators with KNO₃) to 95 (BP-style toughened pencils)", "unit": "% m/m" }, { "quantity": "Thermal decomposition onset", "typical_range": "~440 (to Ag, NO₂, O₂)", "unit": "°C" } ], "questions": [ { "id": "evidence-measurements-q01", "text": "Which of these typical measurements hold for the sense of silver nitrate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-failure-modes-and-hazards", "name": "Failure modes and hazards", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Oxidizer: intensifies combustion of organics and other reducing matter in a fire.", "Corrosive burns to skin, mucous membranes, and eyes; black staining from reduced metallic silver.", "Photochemical reduction in light: crystals and solutions darken, losing assay and appearance specification.", "Mixing with ammonia can yield fulminating silver / silver nitride residues that detonate when dry.", "Incompatibility with acetylene, ethanol under some conditions, and strong reductants.", "Chronic or heavy exposure can cause argyria (irreversible grey-blue pigmentation).", "Dissolved Ag⁺ is highly toxic to aquatic organisms; spills and rinses are an environmental hazard.", "Heating through decomposition releases nitrogen oxides." ], "questions": [ { "id": "evidence-failure-modes-and-hazards-q01", "text": "Which of these failure modes and hazards hold for the sense of silver nitrate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-regional-variation", "name": "Regional variation", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ "Trivial names: lunar caustic (English), Höllenstein (German), pierre infernale / lapis infernalis (French and older Latin pharmacy).", "Toughened applicators: British pharmacopoeial sticks are typically ~95% AgNO₃ with KNO₃; many North American caustic applicators are sold as ~75% AgNO₃ / 25% KNO₃.", "Neonatal eye prophylaxis: 1% silver nitrate was legally mandated in many countries in the 20th century; the United States and much of Europe now prefer erythromycin or other antibiotics, while a few jurisdictions still list AgNO₃ as an allowed option." ], "questions": [ { "id": "evidence-regional-variation-q01", "text": "Which of these regional variation hold for the sense of silver nitrate this model covers, and on what evidence?", "kind": "provenance" } ] }, { "id": "evidence-neighbours", "name": "Neighbouring kinds and how to tell them apart", "description": "Reported by the breadth pass; each item needs checking against its source before it becomes normative.", "evidence": [ { "name": "Silver nitrite (AgNO₂)", "difference": "Different anion and redox behaviour; nitrite responds to the Griess/nitrite tests and is not interchangeable in argentometric standards." }, { "name": "Silver chloride", "difference": "AgCl is water-insoluble and darkens as a halide; AgNO₃ dissolves freely and gives an immediate white AgCl precipitate with dilute HCl that is soluble in ammonia." }, { "name": "Silver sulfate", "difference": "Much lower water solubility; sulfate vs. nitrate confirmed by barium chloride (sulfate) versus the brown-ring or ion-chromatography nitrate test." }, { "name": "Silver iodide", "difference": "Insoluble yellow halide used in photography and cloud seeding; does not supply a concentrated aqueous Ag⁺ solution as AgNO₃ does." }, { "name": "Potassium nitrate", "difference": "Oxidizer without Ag⁺; no curdy white precipitate with HCl, and no black organic stain from silver reduction." }, { "name": "Silver sulfadiazine", "difference": "Organosilver sulfa cream for burns, not a simple inorganic salt; identified by organic sulfa content and cream presentation rather than crystalline AgNO₃ assay." }, { "name": "Tollens' (ammoniacal silver) reagent", "difference": "Prepared from AgNO₃ plus ammonia; the working reagent is not the salt itself, and evaporated residues carry the fulminating-silver explosion hazard that dry AgNO₃ does not." } ], "questions": [ { "id": "evidence-neighbours-q01", "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of silver nitrate this model covers, and on what evidence?", "kind": "provenance" } ] } ] } ] } ] }, "openQuestions": [ "Which authoritative identity references and grade specifications should anchor this registry entry?", "What evidence distinguishes acceptable appearance variation from degradation or contamination for each supplied form?", "Which storage conditions and reassessment intervals are supported for the particular solid grades and solution concentrations represented?", "Which application-specific impurity limits and concentration-verification requirements must the model support?", "Where should ownership pass to neighbouring formulation models for complexed silver solutions, applicator products or other mixtures containing silver nitrate?" ], "statistics": { "bundles": 6, "layers": 11, "findings": 18, "questions": 28 } }, "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 silver nitrate, record what state it is in, and decide what may be done with it.", "whatItIs": "Enable an AI agent to recognise silver nitrate, assess the identity and condition of a particular material, and determine whether its documented composition and handling constraints permit an intended use.", "characteristics": { "substance": "material", "origin": "natural", "agency": "inert", "mobility": "varies" }, "whatYouCanDoWithIt": [ "observed and measured", "consumed or used up" ], "distinguishingFeatures": [ "Described in 61 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 silver nitrate, 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 61 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 silver nitrate from another, and a silver nitrate 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 silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate 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 silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate 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 silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate is built from and which parts are replaceable.", "questions": [ { "id": "parts-and-materials-q01", "text": "What identifies and describes the composition of a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate is judged and by whom.", "questions": [ { "id": "condition-assessment-q01", "text": "What identifies and describes the condition of a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate 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 silver nitrate is, and what that position is measured against.", "questions": [ { "id": "position-and-frame-q01", "text": "What identifies and describes the location of a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate 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 silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate 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 silver nitrate between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a silver nitrate 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 silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate 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 silver nitrate is for, and what it is used for anyway.", "findings": [ { "id": "function-and-purpose", "name": "Function, purpose and misuse", "description": "The function a silver nitrate performs and the uses that fall outside it.", "questions": [ { "id": "function-and-purpose-q01", "text": "What identifies and describes the use of a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate.", "findings": [ { "id": "procedures-and-skills", "name": "Procedures, skills and required tools", "description": "What an agent needs before it can act on a silver nitrate at all.", "questions": [ { "id": "procedures-and-skills-q01", "text": "What identifies and describes handling a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate there is and how fast it goes.", "questions": [ { "id": "consumption-and-stock-q01", "text": "What identifies and describes the supply of a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate 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 silver nitrate 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 silver nitrate 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 silver nitrate 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 silver nitrate, 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 silver nitrate 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 silver nitrate 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 silver nitrate 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 silver nitrate, 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 silver nitrate 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 silver nitrate and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 silver nitrate is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a silver nitrate, 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 silver nitrate, 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 silver nitrate 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 } } } }