{
  "vercy": "1.0-draft",
  "publication": {
    "status": "research-draft",
    "adjudicationStatus": "unreviewed",
    "publishableCanonical": false,
    "generatedAt": "2026-09-13T07:14:03Z",
    "providers": [
      "Claude"
    ],
    "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify",
    "pass": 2,
    "wave": 3,
    "engine": "claude",
    "enrichment": {
      "pass": 3,
      "engine": "claude",
      "producedAt": "2026-10-06T10:00:00Z",
      "ingestedAt": "2026-10-06T07:10:30+00:00",
      "fields": [
        "agent_conduct",
        "ethics",
        "owners"
      ]
    },
    "revisions": [
      {
        "at": "2026-10-06T22:51:08+00:00",
        "engine": "codex",
        "fields": [
          "definition",
          "ethics"
        ],
        "answering_review": "55ce32844816bb398834871ed8a8eb4aaeef4c5aaa0ad259b41e5940526a33f4"
      }
    ],
    "gate": {
      "passed": true,
      "version": "1.0",
      "at": "2026-10-07T10:10:30+00:00",
      "evidence": [
        "completeness 1.00",
        "sense: Wikidata description",
        "2 live sources",
        "review by codex: pass"
      ]
    }
  },
  "metaModel": {
    "id": "THING-Q40164",
    "registryId": "vr.tr.lever",
    "name": "lever",
    "version": "0.2.0-wave.3",
    "entryKind": "thing",
    "family": "Thing Registry",
    "domain": [
      "PHY.OBJ"
    ],
    "status": "research-draft"
  },
  "canonicalUrl": "https://ver.cy/models/thing/q40164/",
  "model": {
    "registry_id": "vr.tr.lever",
    "name": "lever",
    "purpose": "Let an agent explain the lever and its classes, relay physics and examples from mechanics references, describe levers in tools, vehicles and machines, and distinguish levers from other simple machines and from figurative uses of leverage.",
    "definition": "A simple machine consisting of a rigid bar that pivots on a fulcrum to transmit force, with the arrangement determining whether it provides greater output force or greater displacement or speed, classified into first, second and third class levers by the positions of fulcrum, load and effort, and embodied in tools and controls such as crowbars, bottle openers, pedals including automobile pedals, paddle shifters, railway track switch levers and the bierhobel beer tap handle; the lever is one of the classical simple machines described by Archimedes.",
    "what_it_is_for": "Amplifying force or motion.",
    "affordances": [
      "explain classes and physics",
      "relay examples",
      "describe applications",
      "distinguish related machines"
    ],
    "distinguishing_features": [
      "Rigid bar and fulcrum",
      "Three classes",
      "Mechanical advantage",
      "Ubiquitous"
    ],
    "appearance": "A rigid bar pivoting on a fulcrum.",
    "visual_identification": [
      "Bar pivoting on a fulcrum",
      "Crowbar, bottle opener, pedal, paddle shifter, track switch lever, bierhobel",
      "A wheel and axle rotates; a pulley uses a rope; leverage in finance is figurative"
    ],
    "physical_properties": [
      {
        "quantity": "classes",
        "typical_range": "3",
        "unit": "count",
        "note": ""
      },
      {
        "quantity": "mechanical advantage",
        "typical_range": "effort arm divided by load arm",
        "unit": "formula",
        "note": ""
      },
      {
        "quantity": "Archimedes",
        "typical_range": "3rd century BCE",
        "unit": "period",
        "note": "law of the lever"
      }
    ],
    "families_and_kinds": [
      "first class levers such as seesaws and crowbars",
      "second class levers such as wheelbarrows and bottle openers",
      "third class levers such as tweezers and the human forearm",
      "control levers such as pedals, paddle shifters and track switch levers",
      "levers in machines and instruments"
    ],
    "related_models": [
      {
        "relation": "is a kind of",
        "target": "simple machine",
        "why": "in registry terms"
      },
      {
        "relation": "is contrasted with",
        "target": "pulley",
        "why": "another simple machine"
      },
      {
        "relation": "was analysed by",
        "target": "Archimedes",
        "why": "in the law of the lever"
      },
      {
        "relation": "is exemplified by",
        "target": "crowbar",
        "why": "a first class lever"
      }
    ],
    "identifiers": [],
    "standards_and_regulation": [
      "No regulation; ergonomic and safety standards for control levers"
    ],
    "failure_modes_and_hazards": [
      "Confusing lever classes",
      "Registry aliases naming specific devices",
      "Injuries from lever failure under load"
    ],
    "in_scope": [],
    "out_of_scope": [],
    "characteristics": [],
    "agent_conduct": {
      "may": [
        "Explain lever classes and the relation between fulcrum, load and effort.",
        "Calculate mechanical advantage for a described lever."
      ],
      "must_not": [
        "Recommend using a lever beyond what the bar or fulcrum can bear.",
        "Advise prying open doors, locks or containers that belong to others.",
        "Operate control levers on machines the agent is not authorized to run.",
        "Misclassify a lever in teaching material."
      ],
      "requires_human": [
        "Using a lever to move a heavy load near people."
      ]
    },
    "ethics": {
      "considerations": [
        "Levers transmit force, sometimes amplifying it, and failure under load can injure the user and others.",
        "Control levers on machines decide the safety of people nearby."
      ],
      "affected_parties": [
        "Users are affected.",
        "People near the load are affected.",
        "Students are affected."
      ]
    },
    "owners": {
      "steward": "Nobody owns the principle; the person who uses a lever answers for its use.",
      "master_systems": []
    }
  },
  "sources": [
    {
      "id": "wikidata",
      "title": "Wikidata item Q40164: lever",
      "url": "https://www.wikidata.org/wiki/Q40164",
      "url_status": "live",
      "what_it_supports": "identity and sense of the item",
      "checked_by": "wikidata-api"
    },
    {
      "id": "wikipedia-en",
      "title": "Wikipedia: Lever",
      "url": "https://en.wikipedia.org/wiki/Lever",
      "url_status": "live",
      "what_it_supports": "general description of the item",
      "checked_by": "wikidata-api sitelink"
    }
  ],
  "structure": {
    "bundles": [
      {
        "id": "understand",
        "name": "Understand",
        "description": "What a lever is.",
        "rationale": "Science.",
        "layers": [
          {
            "id": "definition",
            "name": "Definition",
            "description": "Definition and classes.",
            "findings": [
              {
                "id": "definition-finding",
                "name": "Definition",
                "description": "Definition.",
                "questions": [
                  {
                    "text": "What is a lever, and what are the three classes?",
                    "kind": "definition"
                  },
                  {
                    "text": "Is the question about the physics, a device or figurative leverage?",
                    "kind": "boundary"
                  }
                ]
              }
            ]
          },
          {
            "id": "physics",
            "name": "Physics",
            "description": "Physics.",
            "findings": [
              {
                "id": "physics-finding",
                "name": "Physics",
                "description": "Physics.",
                "questions": [
                  {
                    "text": "How do torque and mechanical advantage govern levers?",
                    "kind": "definition"
                  },
                  {
                    "text": "Which entry fits mechanical advantage?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "devices",
        "name": "Devices",
        "description": "Devices.",
        "rationale": "Practice.",
        "layers": [
          {
            "id": "tools",
            "name": "Tools",
            "description": "Tools.",
            "findings": [
              {
                "id": "tools-finding",
                "name": "Tools",
                "description": "Tools.",
                "questions": [
                  {
                    "text": "How do crowbars, bottle openers, pliers and the bierhobel use leverage?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which references are standard?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          },
          {
            "id": "controls",
            "name": "Controls",
            "description": "Controls.",
            "findings": [
              {
                "id": "controls-finding",
                "name": "Controls",
                "description": "Controls.",
                "questions": [
                  {
                    "text": "How do pedals, paddle shifters and track switch levers work as controls?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which sources are cited?",
                    "kind": "provenance"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "body",
        "name": "Body",
        "description": "Body and machines.",
        "rationale": "Science.",
        "layers": [
          {
            "id": "anatomy",
            "name": "Anatomy",
            "description": "Levers in the body.",
            "findings": [
              {
                "id": "anatomy-finding",
                "name": "Anatomy",
                "description": "Anatomy.",
                "questions": [
                  {
                    "text": "How do bones and muscles act as levers?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits biomechanics?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "machines",
            "name": "Machines",
            "description": "Levers in machines.",
            "findings": [
              {
                "id": "machines-finding",
                "name": "Machines",
                "description": "Machines.",
                "questions": [
                  {
                    "text": "How are levers combined in linkages and machines?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits linkage?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      },
      {
        "id": "context",
        "name": "Context",
        "description": "History and language.",
        "rationale": "Context.",
        "layers": [
          {
            "id": "history",
            "name": "History",
            "description": "History.",
            "findings": [
              {
                "id": "history-finding",
                "name": "History",
                "description": "History.",
                "questions": [
                  {
                    "text": "How did Archimedes and later scientists analyse the lever?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits the history of mechanics?",
                    "kind": "action"
                  }
                ]
              }
            ]
          },
          {
            "id": "language",
            "name": "Language",
            "description": "Figurative use.",
            "findings": [
              {
                "id": "language-finding",
                "name": "Language",
                "description": "Language.",
                "questions": [
                  {
                    "text": "How is leverage used figuratively in finance and negotiation?",
                    "kind": "provenance"
                  },
                  {
                    "text": "Which entry fits leverage (finance)?",
                    "kind": "action"
                  }
                ]
              }
            ]
          }
        ]
      }
    ]
  },
  "openQuestions": [
    "Should pedal, paddle shifter and bottle opener be separate entries?",
    "How should mechanics references be linked?",
    "The registry entry has merged aliases naming specific devices; should they be split off?"
  ],
  "statistics": {
    "bundles": 4,
    "layers": 8,
    "findings": 8,
    "questions": 16
  }
}