{
    "model": {
        "rank": 4086,
        "code": "thing-q176503",
        "model_id": "vr.tr.femur",
        "name": "femur",
        "purpose": "Enable an agent to recognise a femur, describe its anatomical and mechanical state, and identify which observations or proposed actions require further evidence.",
        "family": "Thing Registry",
        "category": "Physical world and living systems",
        "status": "research-draft",
        "kind": "thing",
        "plane": "PHY",
        "domain": "PHY.MAT",
        "industry": "",
        "version": "",
        "url": "/models/thing/q176503/",
        "tier": 2,
        "score": 78,
        "payload": {
            "layer": "wikidata",
            "aliases": [
                "right femur",
                "left femur"
            ],
            "aliasCount": 2,
            "merged": 2,
            "knownIn": 78,
            "facets": null,
            "markers": [],
            "lexicalClass": "",
            "senseRank": null,
            "alsoRegisteredAs": null,
            "source": {
                "dataset": "wikidata",
                "item": "Q176503",
                "url": "https://www.wikidata.org/wiki/Q176503",
                "license": "CC0 1.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-09T19:26:41Z",
                "providers": [
                    "Codex"
                ],
                "breadth": "recalled by Codex without web access - no source was read",
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "seconds": 26.5,
                        "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: 01a087a2-102e-7823-bd14-7aeeb7d8f1e1\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: femur\nSense to describe: (none recorded)\nDomain code: PHY.LIV\nAlso known as: (none)\n\n\nContext for this batch of 695 things:\n# Batch 004: 1001 registered",
                        "usd": 0,
                        "recall": true
                    },
                    "codex": {
                        "seconds": 61.9,
                        "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: 01a087a2-103e-72f0-999e-45fc97a3f73f\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: femur\nRegistry id: vr.tr.femur\nPlane / domain: PHY / PHY.LIV\nRegistry definition: (none recorded)\nNames folded into this entry: (none)\n\n\nContext for "
                    }
                }
            },
            "metaModel": {
                "id": "THING-Q176503",
                "registryId": "vr.tr.femur",
                "name": "femur",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "PHY.LIV"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/q176503/",
            "model": {
                "registry_id": "vr.tr.femur",
                "name": "femur",
                "purpose": "Enable an agent to recognise a femur, describe its anatomical and mechanical state, and identify which observations or proposed actions require further evidence.",
                "definition": "The femur is the paired long bone of the thigh in humans and many other vertebrates; in humans, it articulates proximally with the acetabulum of the pelvis and distally with the tibia and patella.",
                "scope_statement": "This model owns the femur as an individual anatomical bone or identifiable bone specimen, including its parts, development, articulations and condition; species and laterality must be established rather than assumed.",
                "in_scope": [
                    "Identification of a femur, its species context, laterality and anatomical orientation",
                    "Proximal end, shaft, distal end and their structural relationships",
                    "Bone geometry, cortical and trabecular organisation, and marrow cavity",
                    "Developmental stage, growth regions and skeletal maturity",
                    "Articulation, muscle attachment and load transmission",
                    "Observed integrity, remodelling and alterations of the bone"
                ],
                "out_of_scope": [
                    "The whole organism, its taxonomy or its population",
                    "The thigh as a region containing muscles, vessels, nerves and other tissues",
                    "The pelvis, tibia, patella and complete joint systems",
                    "Disease entities and patient-level diagnosis or treatment plans",
                    "Orthopaedic implants and surgical instruments as independently managed things",
                    "Insect femora and other nonhomologous structures sharing the name"
                ],
                "distinguishing_features": [
                    "Identify the vertebrate skeletal element occupying the proximal hindlimb between the pelvic articulation and the knee region; location alone is insufficient for an isolated fragment.",
                    "For a human femur, check for a rounded proximal head connected through a neck, trochanters, a shaft and paired distal condyles.",
                    "Distinguish a human femur from a humerus by the combined proximal trochanteric anatomy and distal condylar arrangement, rather than by its long-bone shape.",
                    "Distinguish a human femur from a tibia by its proximal head and neck rather than a tibial plateau, together with its distal anatomy.",
                    "Treat the femur as the bone itself: a thigh includes surrounding tissues, while a prosthetic femoral component is an implant."
                ],
                "characteristics": [
                    {
                        "name": "Species attribution",
                        "kind": "relation",
                        "unit_or_values": "Identified organism or taxon; uncertain; unknown",
                        "why_it_matters": "Landmarks, proportions and developmental interpretation depend on species."
                    },
                    {
                        "name": "Laterality",
                        "kind": "category",
                        "unit_or_values": "Left; right; indeterminate",
                        "why_it_matters": "Prevents incorrect orientation, pairing and assignment to an individual."
                    },
                    {
                        "name": "Represented anatomical extent",
                        "kind": "category",
                        "unit_or_values": "Complete bone; proximal end; shaft; distal end; multiple fragments; indeterminate fragment",
                        "why_it_matters": "Determines which identification tests and measurements are possible."
                    },
                    {
                        "name": "Femoral length",
                        "kind": "measurement",
                        "unit_or_values": "mm, with endpoints and measurement method",
                        "why_it_matters": "Supports comparison only when the anatomical endpoints and completeness are known."
                    },
                    {
                        "name": "Neck-shaft angle",
                        "kind": "measurement",
                        "unit_or_values": "Degrees, with axis definitions and imaging or specimen method",
                        "why_it_matters": "Describes proximal geometry relevant to alignment and loading."
                    },
                    {
                        "name": "Femoral version",
                        "kind": "measurement",
                        "unit_or_values": "Degrees, with proximal and distal reference axes and sign convention",
                        "why_it_matters": "Records rotational geometry without confusing it with positioning during observation."
                    },
                    {
                        "name": "Regional cortical thickness",
                        "kind": "measurement",
                        "unit_or_values": "mm, with anatomical location and acquisition method",
                        "why_it_matters": "A local measurement cannot represent the structural condition of the entire bone."
                    },
                    {
                        "name": "Growth-region status",
                        "kind": "state",
                        "unit_or_values": "Open; closing; fused; unobservable, recorded separately by region",
                        "why_it_matters": "Separates developmental anatomy from mature anatomy and limits age inference."
                    },
                    {
                        "name": "Structural integrity",
                        "kind": "state",
                        "unit_or_values": "Observed intact; discontinuity; deformity; tissue loss; indeterminate, with location and evidence",
                        "why_it_matters": "Supports assessment of the bone while keeping observation separate from diagnosis."
                    },
                    {
                        "name": "Articulating relationships",
                        "kind": "relation",
                        "unit_or_values": "Identified pelvic, tibial and patellar counterparts, as applicable to species",
                        "why_it_matters": "Places the bone within its joint system without treating the complete joint as part of the femur."
                    }
                ],
                "affordances": [
                    "Orient and identify a complete bone or fragment using a species-appropriate combination of landmarks.",
                    "Record geometric measurements with explicit landmarks, methods and uncertainty.",
                    "Locate observed changes within proximal, shaft or distal anatomy.",
                    "Compare observations across time or with the contralateral femur when identity and methods are compatible.",
                    "Assess whether available evidence supports an interpretation of development, loading or structural integrity.",
                    "Identify prerequisites for further imaging, specimen handling or specialist assessment without authorising clinical intervention."
                ]
            },
            "sources": [],
            "structure": {
                "bundles": [
                    {
                        "id": "femoral-identity-and-boundaries",
                        "name": "Femoral identity and boundaries",
                        "description": "Establish which bone is represented and which anatomical sense of femur applies.",
                        "rationale": "The name alone does not establish species, side, completeness or whether a similarly named structure is homologous.",
                        "layers": [
                            {
                                "id": "skeletal-element-identification",
                                "name": "Skeletal element identification",
                                "description": "Recognise the proximal hindlimb bone from anatomical context or preserved morphology.",
                                "findings": [
                                    {
                                        "id": "femur-identification-basis",
                                        "name": "Femur identification basis",
                                        "description": "Record the landmark combination or articulated position supporting identification, with alternatives where preservation is insufficient.",
                                        "questions": [
                                            {
                                                "text": "Which preserved landmarks or articulated relationships establish that this is a femur?",
                                                "kind": "definition",
                                                "id": "femur-identification-basis-q01"
                                            },
                                            {
                                                "text": "What supports the species attribution, and could another skeletal element explain the observed fragment?",
                                                "kind": "boundary",
                                                "id": "femur-identification-basis-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "side-and-specimen-extent",
                                "name": "Side and specimen extent",
                                "description": "Establish anatomical orientation and distinguish the bone from associated material.",
                                "findings": [
                                    {
                                        "id": "laterality-and-completeness",
                                        "name": "Laterality and completeness",
                                        "description": "Represent side, preserved regions and associated tissues or implants separately.",
                                        "questions": [
                                            {
                                                "text": "Which landmarks establish left or right and anterior or posterior orientation?",
                                                "kind": "definition",
                                                "id": "laterality-and-completeness-q01"
                                            },
                                            {
                                                "text": "Which femoral regions are present, and which attached tissues or components belong to neighbouring models?",
                                                "kind": "boundary",
                                                "id": "laterality-and-completeness-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "femoral-regions-and-geometry",
                        "name": "Femoral regions and geometry",
                        "description": "Describe the shape and spatial organisation of the proximal end, shaft and distal end.",
                        "rationale": "Femoral recognition and mechanical interpretation depend on regional geometry rather than generic bone dimensions.",
                        "layers": [
                            {
                                "id": "proximal-femoral-geometry",
                                "name": "Proximal femoral geometry",
                                "description": "Describe the head, neck and trochanteric region where applicable to the species.",
                                "findings": [
                                    {
                                        "id": "head-neck-and-trochanter-relationships",
                                        "name": "Head, neck and trochanter relationships",
                                        "description": "Record proximal landmarks and their orientation relative to the shaft without assuming human proportions.",
                                        "questions": [
                                            {
                                                "text": "How are the femoral head centre, neck axis and shaft axis defined for this observation?",
                                                "kind": "measurement",
                                                "id": "head-neck-and-trochanter-relationships-q01"
                                            },
                                            {
                                                "text": "Which proximal landmarks are present and reliably identifiable for the attributed species and developmental stage?",
                                                "kind": "definition",
                                                "id": "head-neck-and-trochanter-relationships-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "shaft-and-distal-geometry",
                                "name": "Shaft and distal geometry",
                                "description": "Describe shaft curvature, condylar geometry and proximal-to-distal orientation.",
                                "findings": [
                                    {
                                        "id": "length-bowing-and-version",
                                        "name": "Length, bowing and version",
                                        "description": "Keep longitudinal dimensions, shaft curvature and rotational alignment distinct and tied to explicit reference axes.",
                                        "questions": [
                                            {
                                                "text": "Which endpoints and planes define femoral length and shaft bowing?",
                                                "kind": "measurement",
                                                "id": "length-bowing-and-version-q01"
                                            },
                                            {
                                                "text": "Which distal reference axis and sign convention are used to measure femoral version?",
                                                "kind": "measurement",
                                                "id": "length-bowing-and-version-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "femoral-tissue-and-development",
                        "name": "Femoral tissue and development",
                        "description": "Represent internal bone organisation and developmental state by anatomical region.",
                        "rationale": "External shape alone cannot describe growth status or the regional tissue organisation relevant to femoral condition.",
                        "layers": [
                            {
                                "id": "regional-bone-organisation",
                                "name": "Regional bone organisation",
                                "description": "Locate cortical bone, trabecular bone and the medullary cavity.",
                                "findings": [
                                    {
                                        "id": "cortex-trabeculae-and-cavity",
                                        "name": "Cortex, trabeculae and cavity",
                                        "description": "Associate tissue observations with a defined femoral region and distinguish measured structure from inferred strength.",
                                        "questions": [
                                            {
                                                "text": "Where and by what method were cortical thickness or trabecular features observed?",
                                                "kind": "measurement",
                                                "id": "cortex-trabeculae-and-cavity-q01"
                                            },
                                            {
                                                "text": "Does the evidence describe bone tissue, cavity contents or an inference about mechanical competence?",
                                                "kind": "boundary",
                                                "id": "cortex-trabeculae-and-cavity-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "growth-and-maturation",
                                "name": "Growth and maturation",
                                "description": "Describe ossification and growth-region status without reducing development to a single assumed age.",
                                "findings": [
                                    {
                                        "id": "regional-maturity-evidence",
                                        "name": "Regional maturity evidence",
                                        "description": "Record visible developmental features separately for proximal and distal regions and relevant secondary centres.",
                                        "questions": [
                                            {
                                                "text": "Which growth regions or ossification centres are visible, and what is their observed status?",
                                                "kind": "definition",
                                                "id": "regional-maturity-evidence-q01"
                                            },
                                            {
                                                "text": "Which species-specific reference supports any age or maturity interpretation?",
                                                "kind": "provenance",
                                                "id": "regional-maturity-evidence-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "femoral-articulation-and-loading",
                        "name": "Femoral articulation and loading",
                        "description": "Connect femoral surfaces and attachment sites to joint participation and mechanical function.",
                        "rationale": "The femur's role depends on its pelvic and knee relationships, muscle forces and loading context.",
                        "layers": [
                            {
                                "id": "joint-and-attachment-interfaces",
                                "name": "Joint and attachment interfaces",
                                "description": "Locate articular regions and attachment landmarks while preserving boundaries with surrounding tissues.",
                                "findings": [
                                    {
                                        "id": "articular-and-attachment-map",
                                        "name": "Articular and attachment map",
                                        "description": "Identify femoral contributions to joint surfaces and relevant muscle or ligament attachment sites.",
                                        "questions": [
                                            {
                                                "text": "Which observed femoral surfaces articulate with which neighbouring skeletal elements?",
                                                "kind": "definition",
                                                "id": "articular-and-attachment-map-q01"
                                            },
                                            {
                                                "text": "Which findings concern the femoral surface itself, and which concern cartilage, ligaments or muscles?",
                                                "kind": "boundary",
                                                "id": "articular-and-attachment-map-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "mechanical-context",
                                "name": "Mechanical context",
                                "description": "Interpret geometry in relation to posture, locomotion and applied forces.",
                                "findings": [
                                    {
                                        "id": "loading-assumptions-and-limits",
                                        "name": "Loading assumptions and limits",
                                        "description": "Make explicit the conditions behind mechanical interpretations and proposed uses of those interpretations.",
                                        "questions": [
                                            {
                                                "text": "What posture, activity, joint constraints and force assumptions underlie the proposed loading interpretation?",
                                                "kind": "measurement",
                                                "id": "loading-assumptions-and-limits-q01"
                                            },
                                            {
                                                "text": "What additional evidence is needed before this femur's geometry can inform a mechanical or intervention decision?",
                                                "kind": "action",
                                                "id": "loading-assumptions-and-limits-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "femoral-condition-and-evidence",
                        "name": "Femoral condition and evidence",
                        "description": "Record regional alterations and determine what the observation method can support.",
                        "rationale": "An apparent femoral defect may reflect biological change, specimen damage or imaging limitations, each with different implications.",
                        "layers": [
                            {
                                "id": "integrity-and-regional-change",
                                "name": "Integrity and regional change",
                                "description": "Locate discontinuity, deformity, remodelling, tissue loss and implant-associated changes.",
                                "findings": [
                                    {
                                        "id": "observed-femoral-alteration",
                                        "name": "Observed femoral alteration",
                                        "description": "Describe the location and morphology of an alteration separately from its cause or clinical classification.",
                                        "questions": [
                                            {
                                                "text": "Which femoral region and surfaces are affected, and what alteration is directly observable?",
                                                "kind": "definition",
                                                "id": "observed-femoral-alteration-q01"
                                            },
                                            {
                                                "text": "What evidence distinguishes biological change from post-removal damage or an observation artefact?",
                                                "kind": "provenance",
                                                "id": "observed-femoral-alteration-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "observation-quality-and-comparison",
                                "name": "Observation quality and comparison",
                                "description": "Qualify femoral measurements and comparisons using acquisition, identity and positioning evidence.",
                                "findings": [
                                    {
                                        "id": "measurement-comparability",
                                        "name": "Measurement comparability",
                                        "description": "Account for projection, calibration, anatomical coverage and specimen identity before comparing apparent femoral differences.",
                                        "questions": [
                                            {
                                                "text": "Could positioning, magnification or incomplete anatomical coverage explain the apparent difference in femoral geometry?",
                                                "kind": "measurement",
                                                "id": "measurement-comparability-q01"
                                            },
                                            {
                                                "text": "What identity, laterality and acquisition evidence must be checked before comparing this observation with another femur or time point?",
                                                "kind": "action",
                                                "id": "measurement-comparability-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-confidence-notes",
                                        "name": "Check these first",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "The registry supplies no sense; this description emphasizes human anatomy. The femur is an anatomical structure, not an organism or taxon.",
                                            "In arthropod anatomy, femur also names a leg segment; that distinct sense is not covered here.",
                                            "Measurements are approximate recall values, not diagnostic limits; verify measurement protocols, reference populations and exact ontology identifiers before publication."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-confidence-notes-q01",
                                                "text": "Which of these check these first hold for the sense of femur 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": [
                                            "Left femur",
                                            "Right femur"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of femur 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": "Terminologia Anatomica",
                                                "value_or_pattern": "Femur",
                                                "note": "Anatomical name in the terminology maintained by the Federative International Programme for Anatomical Terminology (FIPAT)."
                                            },
                                            {
                                                "scheme": "Foundational Model of Anatomy (FMA)",
                                                "value_or_pattern": "FMA numerical identifier",
                                                "note": "Identifies an anatomical class; an individual bone and its laterality require additional representation."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-identifiers-q01",
                                                "text": "Which of these identifiers and schemes hold for the sense of femur 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": [
                                            "Terminologia Anatomica, maintained by FIPAT, standardizes human anatomical terminology for the femur and its named parts."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-standards-and-regulation-q01",
                                                "text": "Which of these standards and regulation hold for the sense of femur 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": [
                                            "Transmits loads between the hip and knee during standing and movement.",
                                            "Provides attachment sites and leverage for muscles moving the hip and knee.",
                                            "Contains marrow and participates in bone remodeling and mineral storage.",
                                            "Provides anatomical landmarks for fracture fixation and hip or knee replacement.",
                                            "Used in skeletal anthropology to estimate stature from population-appropriate reference equations."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of femur 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": "Adult human femoral length",
                                                "typical_range": "Approximately 40-50; varies substantially with stature and population, and depends on measurement method",
                                                "unit": "cm"
                                            },
                                            {
                                                "quantity": "Adult human femoral neck-shaft angle",
                                                "typical_range": "Approximately 120-135",
                                                "unit": "degrees"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of femur 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": [
                                            "Fractures can involve the proximal femur, shaft or distal femur.",
                                            "Femoral shaft fractures can cause substantial internal blood loss.",
                                            "Displaced femoral neck fractures can compromise blood supply to the femoral head, causing osteonecrosis.",
                                            "Fractures may develop nonunion or heal with malalignment.",
                                            "Osteoporosis can increase susceptibility to proximal femoral fractures after low-energy trauma."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of femur 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": [
                                            "Femoral dimensions and proportions vary within and among human populations; population averages do not reliably identify an individual's ancestry.",
                                            "Stature-estimation equations based on femoral length require reference populations and measurement methods appropriate to their intended application."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-regional-variation-q01",
                                                "text": "Which of these regional variation hold for the sense of femur 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": "Humerus",
                                                "difference": "The long bone of the upper arm, rather than the thigh."
                                            },
                                            {
                                                "name": "Tibia",
                                                "difference": "The principal weight-bearing bone of the lower leg; it meets the femur at the knee."
                                            },
                                            {
                                                "name": "Patella",
                                                "difference": "A sesamoid bone within the quadriceps tendon that articulates with the distal femur."
                                            },
                                            {
                                                "name": "Hip bone",
                                                "difference": "A pelvic bone containing the acetabulum that receives the femoral head."
                                            },
                                            {
                                                "name": "Thigh",
                                                "difference": "The body region containing the femur, muscles, vessels, nerves and other tissues."
                                            },
                                            {
                                                "name": "Femoral head",
                                                "difference": "The proximal articular part of the femur, rather than the whole bone."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of femur this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Does vr.tr.femur intend the human femur specifically or the homologous vertebrate skeletal element across species?",
                "Which existing Vercy world model, if any, already owns this concept and should be linked instead of duplicated?",
                "Which anatomical authorities and measurement conventions should govern landmarks, neck-shaft angle and femoral version?",
                "Which species- and population-specific developmental references are appropriate, and what uncertainty accompanies maturity interpretation?",
                "Which intended use cases - anatomical recognition, clinical observation, comparative anatomy or specimen curation - determine the required evidence and action boundaries?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 19,
                "questions": 29
            }
        },
        "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 femur, record what state it is in, and decide what may be done with it.",
            "whatItIs": "Enable an agent to recognise a femur, describe its anatomical and mechanical state, and identify which observations or proposed actions require further evidence.",
            "characteristics": {
                "substance": "material",
                "origin": "natural",
                "agency": "inert",
                "mobility": "varies"
            },
            "whatYouCanDoWithIt": [
                "observed and measured",
                "consumed or used up"
            ],
            "distinguishingFeatures": [
                "Names folded into this entry, which a task may need to split apart again: right femur, left femur.",
                "2 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.",
                "Described in 78 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 femur, 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": [
                {
                    "relation": "covers",
                    "note": "Finer kinds folded into this entry because telling them apart needs a task that asks for it. Each is a model waiting to be split out when one does.",
                    "targets": [
                        "right femur",
                        "left femur"
                    ]
                }
            ],
            "standing": "Described in 78 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 2 finer distinctions are held inside this entry as names rather than as separate models.",
            "structure": {
                "bundles": [
                    {
                        "id": "identity-and-classification",
                        "name": "Identity, naming and classification",
                        "description": "How an agent tells one femur from another, and a femur 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 femur, 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 femur, 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 femur 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 femur, 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 femur, 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 femur 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 femur 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 femur, 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 femur, 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 femur 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 femur from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a femur, 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 femur, 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 femur 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 femur 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 femur, 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 femur, 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 femur 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 femur is built from and which parts are replaceable.",
                                        "questions": [
                                            {
                                                "id": "parts-and-materials-q01",
                                                "text": "What identifies and describes the composition of a femur, 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 femur, 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 femur 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 femur is judged and by whom.",
                                        "questions": [
                                            {
                                                "id": "condition-assessment-q01",
                                                "text": "What identifies and describes the condition of a femur, 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 femur, 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 femur 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 femur 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 femur is, and what that position is measured against.",
                                        "questions": [
                                            {
                                                "id": "position-and-frame-q01",
                                                "text": "What identifies and describes the location of a femur, 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 femur, 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 femur 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 femur 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 femur, 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 femur, 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 femur 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 femur 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 femur between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a femur, 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 femur, 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 femur 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 femur, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a femur 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 femur, 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 femur, 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 femur 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 femur 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 femur is for, and what it is used for anyway.",
                                "findings": [
                                    {
                                        "id": "function-and-purpose",
                                        "name": "Function, purpose and misuse",
                                        "description": "The function a femur performs and the uses that fall outside it.",
                                        "questions": [
                                            {
                                                "id": "function-and-purpose-q01",
                                                "text": "What identifies and describes the use of a femur, 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 femur, 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 femur 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 femur.",
                                "findings": [
                                    {
                                        "id": "procedures-and-skills",
                                        "name": "Procedures, skills and required tools",
                                        "description": "What an agent needs before it can act on a femur at all.",
                                        "questions": [
                                            {
                                                "id": "procedures-and-skills-q01",
                                                "text": "What identifies and describes handling a femur, 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 femur, 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 femur 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 femur there is and how fast it goes.",
                                        "questions": [
                                            {
                                                "id": "consumption-and-stock-q01",
                                                "text": "What identifies and describes the supply of a femur, 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 femur, 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 femur 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 femur 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 femur 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 femur 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 femur 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 femur, 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 femur 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 femur 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 femur 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 femur, 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 femur 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 femur and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a femur, 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 femur, 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 femur 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 femur is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a femur, 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 femur, 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 femur 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
            }
        }
    }
}