{
    "model": {
        "rank": 6898,
        "code": "thing-propulsion",
        "model_id": "vr.tr.propulsion",
        "name": "propulsion",
        "purpose": "the act of propelling",
        "family": "Thing Registry",
        "category": "Activities and processes",
        "status": "research-draft",
        "kind": "thing",
        "plane": "ACT",
        "domain": "ACT.ACT",
        "industry": "",
        "version": "",
        "url": "/models/thing/propulsion/",
        "tier": 2,
        "score": 58,
        "payload": {
            "layer": "wordnet",
            "aliases": [
                "actuation",
                "drive",
                "thrust",
                "driving force",
                "firewall",
                "roll",
                "bowl",
                "throw",
                "fling",
                "heave",
                "heaving",
                "hurl",
                "cast",
                "leaner",
                "pass",
                "toss",
                "flip",
                "pitch",
                "delivery",
                "ringer",
                "shy",
                "slinging",
                "throw-in",
                "balk",
                "beanball",
                "beaner",
                "change-up",
                "change-of-pace",
                "change-of-pace ball",
                "off-speed pitch",
                "duster",
                "fastball",
                "heater",
                "smoke",
                "hummer",
                "bullet",
                "knuckleball",
                "knuckler",
                "overhand pitch",
                "passed ball"
            ],
            "aliasCount": 96,
            "merged": 58,
            "knownIn": 0,
            "facets": {
                "substance": "activity",
                "origin": "conceptual",
                "agency": "inert",
                "mobility": "not-applicable",
                "scale": "not-applicable",
                "affordances": [
                    "observable"
                ]
            },
            "markers": [],
            "lexicalClass": "noun.act",
            "senseRank": 1,
            "alsoRegisteredAs": null,
            "source": {
                "dataset": "oewn:2024",
                "synset": "oewn-00045991-n",
                "ili": "i35644",
                "license": "CC BY 4.0"
            }
        },
        "research": {
            "vercy": "1.0-draft",
            "publication": {
                "status": "research-draft",
                "adjudicationStatus": "unreviewed",
                "publishableCanonical": false,
                "generatedAt": "2026-09-09T23:44:07Z",
                "providers": [
                    "Codex"
                ],
                "breadth": "recalled by Codex without web access - no source was read",
                "missingProviders": [],
                "pass": 2,
                "cost": {
                    "grok": {
                        "seconds": 17.8,
                        "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: 01a0888d-b88a-7683-bfba-db9bbbcd7e42\n--------\nuser\nDescribe what is already known about one registered thing. Answer as JSON only, no prose around it.\n\nThing: propulsion\nSense to describe: the act of propelling\nDomain code: ACT.ACT\nAlso known as: (none)\n\n\nContext for this batch of 1001 things:\n# Batch 007: 100",
                        "usd": 0,
                        "recall": true
                    },
                    "codex": {
                        "seconds": 63.7,
                        "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: 01a0888d-b87f-74f2-b90c-142205607422\n--------\nuser\nYou are drafting a Vercy meta-model for one registered thing. Answer as JSON only, no prose around it.\n\nThing: propulsion\nRegistry id: vr.tr.propulsion\nPlane / domain: ACT / ACT.ACT\nRegistry definition: the act of propelling\nNames folded into this entry: (none"
                    }
                }
            },
            "metaModel": {
                "id": "THING-PROPULSION",
                "registryId": "vr.tr.propulsion",
                "name": "propulsion",
                "version": "0.1.0-research.1",
                "entryKind": "thing",
                "family": "Thing Registry",
                "domain": [
                    "ACT.ACT"
                ],
                "status": "research-draft"
            },
            "canonicalUrl": "https://ver.cy/models/thing/propulsion/",
            "model": {
                "registry_id": "vr.tr.propulsion",
                "name": "propulsion",
                "purpose": "Enable an agent to recognise an act of propulsion, assess how it produces or maintains motion, and identify feasible adjustments within stated operating limits.",
                "definition": "Propulsion is the act or process of producing a driving force that moves a body or sustains its motion through interaction with its surroundings or the expulsion of reaction mass.",
                "scope_statement": "This model owns propulsion as an activity that applies a driving force to a body through an identifiable interaction, including its participants, mechanism, energy use, control and motion effects; it does not own the propelling device or propelled body.",
                "in_scope": [
                    "The propelled body, propelling participant or mechanism, and boundaries of a propulsion episode",
                    "Driving-force generation and transfer through contact, surrounding media, expelled material or other specified interactions",
                    "Energy supplied, converted and expended during propulsion",
                    "Control of propulsion magnitude, direction and timing",
                    "Motion effects, propulsion performance and operating constraints"
                ],
                "out_of_scope": [
                    "Construction and component inventories of engines, motors, propellers and other propulsion devices",
                    "The complete design and condition of the propelled vehicle, organism or object",
                    "Navigation, route selection and the wider transport mission",
                    "Fuel manufacture, energy infrastructure and upstream resource supply",
                    "Motion without an identified propelling interaction",
                    "Figurative propulsion of careers, ideas or organisations"
                ],
                "distinguishing_features": [
                    "Identify an interaction supplying a driving force; observed movement alone does not establish that propulsion is occurring.",
                    "Treat propulsion as an activity with an operating interval, rather than as the engine or other device capable of performing it.",
                    "Record applied driving force separately from net force: propulsion may maintain speed while other forces oppose motion.",
                    "Distinguish propulsion from steering and braking by the force's role in the episode, while allowing one mechanism to perform several roles.",
                    "Do not require self-propulsion: record whether the driving action originates within the propelled system or comes from an external participant."
                ],
                "characteristics": [
                    {
                        "name": "Propelled system",
                        "kind": "relation",
                        "unit_or_values": "Body or aggregate being propelled, with an explicit system boundary",
                        "why_it_matters": "Determines which forces, energy transfers and motion observations belong to the activity."
                    },
                    {
                        "name": "Propelling participant",
                        "kind": "relation",
                        "unit_or_values": "Organism, device or external actor performing the driving action",
                        "why_it_matters": "Separates the act from its performer and distinguishes internal from external propulsion."
                    },
                    {
                        "name": "Force-transfer mechanism",
                        "kind": "category",
                        "unit_or_values": "Contact traction or push; interaction with a fluid; expelled material; field-mediated interaction; other specified; unresolved",
                        "why_it_matters": "Identifies what the act interacts with and which operating conditions constrain force production."
                    },
                    {
                        "name": "Driving force",
                        "kind": "measurement",
                        "unit_or_values": "Vector in N, with reference frame, application location and time basis",
                        "why_it_matters": "Supports assessment of acceleration, resistance compensation and directional effects."
                    },
                    {
                        "name": "Propulsion operating state",
                        "kind": "state",
                        "unit_or_values": "Starting; active; modulating; stopping; interrupted; completed; unknown",
                        "why_it_matters": "Distinguishes an ongoing act from available capability or a command that has not produced force."
                    },
                    {
                        "name": "Energy input",
                        "kind": "measurement",
                        "unit_or_values": "J per episode or W over a stated interval, with the energy boundary identified",
                        "why_it_matters": "Supports endurance and resource assessments without conflating stored energy with delivered mechanical energy."
                    },
                    {
                        "name": "Velocity of the propelled system",
                        "kind": "measurement",
                        "unit_or_values": "Vector in m/s relative to a specified frame or medium",
                        "why_it_matters": "Connects propulsion to motion while making frame-dependent performance measures interpretable."
                    },
                    {
                        "name": "Propulsion performance measure",
                        "kind": "measurement",
                        "unit_or_values": "Named measure with units, calculation, operating point and system boundary",
                        "why_it_matters": "Allows comparisons only when quantities such as efficiency, impulse or energy per distance have compatible meanings."
                    },
                    {
                        "name": "Operating envelope",
                        "kind": "relation",
                        "unit_or_values": "Applicable force, power, speed, traction, thermal, environmental and resource limits",
                        "why_it_matters": "Determines which propulsion adjustments are feasible under current conditions."
                    }
                ],
                "affordances": [
                    "Identify a propulsion episode and link it to the propelled body and force-producing participants.",
                    "Explain the interaction through which the driving force reaches the propelled body.",
                    "Assess whether propulsion is accelerating the body, maintaining motion or failing to achieve its intended effect.",
                    "Compare propulsion performance under compatible operating conditions and measurement boundaries.",
                    "Evaluate adjustments to force, direction or timing against available energy and operating limits.",
                    "Identify missing observations needed to distinguish ineffective propulsion from absent propulsion."
                ]
            },
            "sources": [],
            "structure": {
                "bundles": [
                    {
                        "id": "propulsion-episode",
                        "name": "Propulsion episode",
                        "description": "Identifies what is being propelled, what performs the act and when the act occurs.",
                        "rationale": "Propulsion must be recognisable as an activity rather than inferred from the presence of a device or from movement alone.",
                        "layers": [
                            {
                                "id": "participants-and-system-boundary",
                                "name": "Participants and system boundary",
                                "description": "Establishes the body receiving the driving action and the participants supplying it.",
                                "findings": [
                                    {
                                        "id": "propelled-body-and-propelling-participant",
                                        "name": "Propelled body and propelling participant",
                                        "description": "Record the propelled system separately from the actor or mechanism applying the driving force, including whether that participant lies inside the system boundary.",
                                        "questions": [
                                            {
                                                "text": "Which body or aggregate is being propelled, and where is its system boundary drawn?",
                                                "kind": "definition",
                                                "id": "propelled-body-and-propelling-participant-q01"
                                            },
                                            {
                                                "text": "Which participant supplies the driving action, and is it internal or external to that boundary?",
                                                "kind": "boundary",
                                                "id": "propelled-body-and-propelling-participant-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "episode-and-force-role",
                                "name": "Episode and force role",
                                "description": "Distinguishes active propulsion from capability, coasting and other force-producing activities.",
                                "findings": [
                                    {
                                        "id": "evidence-of-active-propulsion",
                                        "name": "Evidence of active propulsion",
                                        "description": "Record the observations and adopted criterion that establish the start, continuation and end of propulsion, including its relationship to braking or steering.",
                                        "questions": [
                                            {
                                                "text": "What observed interaction establishes that propulsion is active, and what marks its start and end?",
                                                "kind": "measurement",
                                                "id": "evidence-of-active-propulsion-q01"
                                            },
                                            {
                                                "text": "When the same mechanism drives, steers or brakes, which criterion assigns its role during this interval?",
                                                "kind": "boundary",
                                                "id": "evidence-of-active-propulsion-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "driving-interaction",
                        "name": "Driving interaction",
                        "description": "Explains how driving force is generated and transferred to the propelled system.",
                        "rationale": "The interaction distinguishes propulsion mechanisms and identifies dependencies that a device name alone cannot establish.",
                        "layers": [
                            {
                                "id": "interaction-partner",
                                "name": "Interaction partner",
                                "description": "Identifies the surface, medium, expelled material or other system participating in force transfer.",
                                "findings": [
                                    {
                                        "id": "force-transfer-path",
                                        "name": "Force-transfer path",
                                        "description": "Record how the mechanism exchanges momentum with its surroundings or another body, including the physical conditions required for that interaction.",
                                        "questions": [
                                            {
                                                "text": "Through what contact, medium, expelled material or other specified interaction is the driving force produced?",
                                                "kind": "definition",
                                                "id": "force-transfer-path-q01"
                                            },
                                            {
                                                "text": "Which observations or technical account support the identified force-transfer path?",
                                                "kind": "provenance",
                                                "id": "force-transfer-path-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "force-application",
                                "name": "Force application",
                                "description": "Characterises the magnitude, direction, location and temporal pattern of the driving force.",
                                "findings": [
                                    {
                                        "id": "applied-driving-force",
                                        "name": "Applied driving force",
                                        "description": "Record the propulsion force separately from resultant force, with enough spatial and temporal detail to interpret its motion effects.",
                                        "questions": [
                                            {
                                                "text": "What driving-force vector is applied, at what location, and in which reference frame?",
                                                "kind": "measurement",
                                                "id": "applied-driving-force-q01"
                                            },
                                            {
                                                "text": "Is force continuous or intermittent, and what interval supports any reported average or impulse?",
                                                "kind": "measurement",
                                                "id": "applied-driving-force-q02"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "energy-and-expenditure",
                        "name": "Energy and expenditure",
                        "description": "Connects the driving action to energy supply, conversion and resource consumption.",
                        "rationale": "An agent needs to distinguish force production from energy availability and determine how long the act can continue.",
                        "layers": [
                            {
                                "id": "energy-path",
                                "name": "Energy path",
                                "description": "Tracks energy entering the propulsion activity and reaching the driving interaction.",
                                "findings": [
                                    {
                                        "id": "input-and-conversion-boundary",
                                        "name": "Input and conversion boundary",
                                        "description": "Identify the energy source and conversion stages included in the assessment, distinguishing source energy from energy delivered at the propulsion interface.",
                                        "questions": [
                                            {
                                                "text": "What energy source sustains propulsion, and which conversion stages lie inside the assessment boundary?",
                                                "kind": "boundary",
                                                "id": "input-and-conversion-boundary-q01"
                                            },
                                            {
                                                "text": "How much energy or power enters that boundary during the stated operating interval?",
                                                "kind": "measurement",
                                                "id": "input-and-conversion-boundary-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "resource-use-and-performance",
                                "name": "Resource use and performance",
                                "description": "Relates resource expenditure to a defined propulsion result.",
                                "findings": [
                                    {
                                        "id": "comparable-performance-measure",
                                        "name": "Comparable performance measure",
                                        "description": "Record a mechanism-appropriate measure of expenditure or performance, including its definition and conditions rather than assuming one efficiency measure fits every case.",
                                        "questions": [
                                            {
                                                "text": "Which performance measure is appropriate here, and what are its calculation, units and reference frame?",
                                                "kind": "definition",
                                                "id": "comparable-performance-measure-q01"
                                            },
                                            {
                                                "text": "What resource consumption and delivered result were measured at the same operating point?",
                                                "kind": "measurement",
                                                "id": "comparable-performance-measure-q02"
                                            },
                                            {
                                                "text": "What duration or further propulsion effort can the remaining resources support under stated assumptions?",
                                                "kind": "action",
                                                "id": "comparable-performance-measure-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "propulsion-control-and-limits",
                        "name": "Propulsion control and limits",
                        "description": "Describes how propulsion can be changed and what constrains those changes.",
                        "rationale": "Available commands do not guarantee delivered force; action selection requires the response and limits of the actual driving interaction.",
                        "layers": [
                            {
                                "id": "command-to-force-response",
                                "name": "Command-to-force response",
                                "description": "Links controllable inputs to changes in propulsion magnitude, direction and timing.",
                                "findings": [
                                    {
                                        "id": "available-propulsion-adjustments",
                                        "name": "Available propulsion adjustments",
                                        "description": "Record the inputs that alter propulsion and the observed or supported response, including delays and limits on the rate of change.",
                                        "questions": [
                                            {
                                                "text": "Which inputs can start, stop, increase, reduce or redirect the driving force?",
                                                "kind": "action",
                                                "id": "available-propulsion-adjustments-q01"
                                            },
                                            {
                                                "text": "What delay, rate limit or variability separates an input change from delivered force?",
                                                "kind": "measurement",
                                                "id": "available-propulsion-adjustments-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "interaction-and-equipment-limits",
                                "name": "Interaction and equipment limits",
                                "description": "Identifies constraints imposed by the force-transfer interaction, the performer and current conditions.",
                                "findings": [
                                    {
                                        "id": "feasible-driving-envelope",
                                        "name": "Feasible driving envelope",
                                        "description": "Record applicable constraints such as available traction, medium conditions, power, temperature or fatigue, together with evidence that a limit is approaching.",
                                        "questions": [
                                            {
                                                "text": "Which current conditions limit the magnitude, direction or duration of propulsion?",
                                                "kind": "measurement",
                                                "id": "feasible-driving-envelope-q01"
                                            },
                                            {
                                                "text": "What evidence supports each operating limit and indicates whether it has been reached?",
                                                "kind": "provenance",
                                                "id": "feasible-driving-envelope-q02"
                                            },
                                            {
                                                "text": "Which adjustment remains feasible when a limiting condition is approached?",
                                                "kind": "action",
                                                "id": "feasible-driving-envelope-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "motion-effect-and-effectiveness",
                        "name": "Motion effect and effectiveness",
                        "description": "Assesses what propulsion contributes to motion and whether it achieves the episode's intended result.",
                        "rationale": "Propulsion may sustain speed, oppose disturbances or produce little observed movement, so effectiveness cannot be judged from acceleration alone.",
                        "layers": [
                            {
                                "id": "force-balance-and-motion",
                                "name": "Force balance and motion",
                                "description": "Relates the driving contribution to resistance, other external forces and observed movement.",
                                "findings": [
                                    {
                                        "id": "propulsion-contribution-to-motion",
                                        "name": "Propulsion contribution to motion",
                                        "description": "Record driving force and other relevant forces separately, then relate their combined effect to the propelled system's measured motion.",
                                        "questions": [
                                            {
                                                "text": "What velocity and acceleration are observed in the specified frame during propulsion?",
                                                "kind": "measurement",
                                                "id": "propulsion-contribution-to-motion-q01"
                                            },
                                            {
                                                "text": "Which opposing or assisting forces explain the difference between applied driving force and observed motion?",
                                                "kind": "measurement",
                                                "id": "propulsion-contribution-to-motion-q02"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "achieved-effect-and-shortfall",
                                "name": "Achieved effect and shortfall",
                                "description": "Evaluates the intended propulsion result and distinguishes failure to generate force from failure to obtain the desired motion.",
                                "findings": [
                                    {
                                        "id": "effectiveness-and-diagnostic-evidence",
                                        "name": "Effectiveness and diagnostic evidence",
                                        "description": "Compare the intended effect with force and motion observations, retaining uncertainty where resistance, poor coupling or unavailable power cannot yet be distinguished.",
                                        "questions": [
                                            {
                                                "text": "What intended effect defines success for this episode, and was it achieved?",
                                                "kind": "measurement",
                                                "id": "effectiveness-and-diagnostic-evidence-q01"
                                            },
                                            {
                                                "text": "Which observation would distinguish absent driving force from force that is counteracted or poorly transferred?",
                                                "kind": "action",
                                                "id": "effectiveness-and-diagnostic-evidence-q02"
                                            },
                                            {
                                                "text": "Does the evidence support continuing, adjusting or ending propulsion, and under which operating constraints?",
                                                "kind": "action",
                                                "id": "effectiveness-and-diagnostic-evidence-q03"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "evidence-and-external-alignment",
                        "name": "Evidence and external alignment",
                        "description": "What the world already says about this thing, gathered so the model can be checked against it.",
                        "rationale": "A model that cannot be lined up against existing standards, identifiers and practice cannot be adopted by anyone who already uses them.",
                        "layers": [
                            {
                                "id": "reported-evidence",
                                "name": "Reported evidence",
                                "description": "Findings from the breadth pass, kept separate from the structural claims.",
                                "findings": [
                                    {
                                        "id": "evidence-confidence-notes",
                                        "name": "Check these first",
                                        "description": "Recalled without web access and unsourced; every item is a lead to verify.",
                                        "evidence": [
                                            "This is recalled knowledge, not source-verified research; no universal identifier or standard for the act itself is asserted.",
                                            "The kinds listed overlap and illustrate established distinctions rather than a single exhaustive taxonomy.",
                                            "Efficiency definitions and applicable safety regulations require a specified mechanism, application and system boundary."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-confidence-notes-q01",
                                                "text": "Which of these check these first hold for the sense of propulsion 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": [
                                            "Ground-contact propulsion through wheels, tracks or limbs",
                                            "Propeller or rotor propulsion",
                                            "Jet propulsion",
                                            "Rocket propulsion",
                                            "Biological swimming propulsion",
                                            "Sail propulsion"
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-kinds-q01",
                                                "text": "Which of these kinds and varieties hold for the sense of propulsion 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": [
                                            "Moving road and rail vehicles through traction.",
                                            "Driving ships and underwater vehicles.",
                                            "Sustaining powered flight in aircraft.",
                                            "Launching spacecraft and changing their trajectories.",
                                            "Moving organisms through walking, swimming or flying."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-real-world-use-q01",
                                                "text": "Which of these real-world use hold for the sense of propulsion 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": "Propulsive force or thrust",
                                                "typical_range": "Depends on the body, mechanism and operating conditions; no general range applies.",
                                                "unit": "N"
                                            },
                                            {
                                                "quantity": "Propulsive power",
                                                "typical_range": "Depends on force and velocity; no general range applies.",
                                                "unit": "W"
                                            },
                                            {
                                                "quantity": "Total impulse",
                                                "typical_range": "Depends on thrust history and duration; no general range applies.",
                                                "unit": "N·s"
                                            },
                                            {
                                                "quantity": "Propulsive efficiency",
                                                "typical_range": "0-1 for conventional useful-power-to-input-power definitions with consistent system boundaries.",
                                                "unit": "dimensionless"
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-measurements-q01",
                                                "text": "Which of these typical measurements hold for the sense of propulsion 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": [
                                            "Insufficient propulsive force to overcome resistance or maintain the required trajectory.",
                                            "Uncommanded or asymmetric force causing loss of directional control.",
                                            "Loss of traction or ineffective coupling to the surrounding medium.",
                                            "In powered systems, mechanical failure, overheating or interruption of the energy supply.",
                                            "Mechanism-dependent exposure to rotating parts, exhaust, pressure waves or expelled material."
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-failure-modes-and-hazards-q01",
                                                "text": "Which of these failure modes and hazards hold for the sense of propulsion 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": "motion",
                                                "difference": "Motion is a change in position; it can continue by inertia without ongoing propulsion."
                                            },
                                            {
                                                "name": "thrust",
                                                "difference": "Thrust is a force; propulsion is the process in which a driving force is produced and applied."
                                            },
                                            {
                                                "name": "locomotion",
                                                "difference": "Locomotion is movement from place to place, especially by an organism; propulsion describes the force-producing action that enables it."
                                            },
                                            {
                                                "name": "propulsion system",
                                                "difference": "A propulsion system is the physical equipment that performs propulsion; this entry describes the act."
                                            },
                                            {
                                                "name": "traction",
                                                "difference": "Traction transmits driving force through contact with a surface and is one means of propulsion."
                                            },
                                            {
                                                "name": "acceleration",
                                                "difference": "Acceleration is a change in velocity resulting from net force; propulsion may instead balance resistance at constant velocity."
                                            }
                                        ],
                                        "questions": [
                                            {
                                                "id": "evidence-neighbours-q01",
                                                "text": "Which of these neighbouring kinds and how to tell them apart hold for the sense of propulsion this model covers, and on what evidence?",
                                                "kind": "provenance"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "openQuestions": [
                "Should the registry's broad definition include every external push and tow, or do neighbouring activity models establish a narrower boundary?",
                "How should gravity-driven and buoyancy-driven movement be classified when there is no separately identifiable active propelling mechanism?",
                "Does force production against a fixed restraint count as an actual propulsion episode or as a test of propulsion capability?",
                "Where should the boundary fall between propulsion, braking and station-keeping when one mechanism changes roles within an episode?",
                "Which performance measures support useful comparisons across biological, contact-based, fluid-based and expelled-material propulsion without obscuring their different system boundaries?"
            ],
            "statistics": {
                "bundles": 6,
                "layers": 11,
                "findings": 16,
                "questions": 29
            }
        },
        "draft": {
            "generator": "vr.draft.v3",
            "status": "draft-generated",
            "researched": false,
            "archetype": "abstract concept",
            "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.",
            "facetsInferred": false,
            "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 propulsion, record what state it is in, and decide what may be done with it.",
            "whatItIs": "the act of propelling",
            "characteristics": {
                "substance": "activity",
                "origin": "conceptual",
                "agency": "inert"
            },
            "whatYouCanDoWithIt": [
                "observed and measured"
            ],
            "distinguishingFeatures": [
                "Names folded into this entry, which a task may need to split apart again: actuation, drive, thrust, driving force, firewall, roll, bowl, throw, fling, heave, heaving, hurl.",
                "58 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it."
            ],
            "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 propulsion, and on what evidence are they told apart?"
            ],
            "whatItIsMadeOf": "something that happens over time",
            "physicalCharacter": [
                "Does nothing on its own; everything it does, something else did to it."
            ],
            "whatCanBeDoneWithIt": [
                "observe it, measure it, record its state"
            ],
            "howItIsRecognised": [
                "Nothing to see. What is recognised is an instance of it, and which instances count is exactly what is argued about."
            ],
            "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": [
                        "actuation",
                        "drive",
                        "thrust",
                        "driving force",
                        "firewall",
                        "roll",
                        "bowl",
                        "throw",
                        "fling",
                        "heave",
                        "heaving",
                        "hurl"
                    ]
                }
            ],
            "standing": "58 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 propulsion from another, and a propulsion 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 propulsion, 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 propulsion, 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 propulsion 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 propulsion, 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 propulsion, 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 propulsion 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 propulsion 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 propulsion, 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 propulsion, 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 propulsion 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 propulsion from the things most often confused with it.",
                                        "questions": [
                                            {
                                                "id": "distinguishing-features-q01",
                                                "text": "What identifies and describes what distinguishes a propulsion, 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 propulsion, 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 propulsion 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 propulsion 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 propulsion between them.",
                                        "questions": [
                                            {
                                                "id": "stages-and-transitions-q01",
                                                "text": "What identifies and describes the lifecycle of a propulsion, 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 propulsion, 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 propulsion 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 propulsion, how often and by whom.",
                                "findings": [
                                    {
                                        "id": "observation-record",
                                        "name": "Observation record",
                                        "description": "How an observation of a propulsion 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 propulsion, 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 propulsion, 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 propulsion is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "process-and-outcome",
                        "name": "Process, inputs and outcome",
                        "description": "How a propulsion proceeds, what it needs and what it leaves behind.",
                        "rationale": "An activity is known by its steps and its results, and both have to be recordable while it is still running.",
                        "layers": [
                            {
                                "id": "steps-and-sequence",
                                "name": "Steps and sequence",
                                "description": "The steps of a propulsion, their order and what may run in parallel.",
                                "findings": [
                                    {
                                        "id": "steps-and-preconditions",
                                        "name": "Steps, preconditions and completion",
                                        "description": "What has to be true before each step of a propulsion and what marks it done.",
                                        "questions": [
                                            {
                                                "id": "steps-and-preconditions-q01",
                                                "text": "What identifies and describes a step of a propulsion, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "steps-and-preconditions-q02",
                                                "text": "Who or what asserted this about a step of a propulsion, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "steps-and-preconditions-q03",
                                                "text": "What may an agent decide or do once a step of a propulsion is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "inputs-and-results",
                                "name": "Inputs, resources and results",
                                "description": "What a propulsion consumes and what it produces.",
                                "findings": [
                                    {
                                        "id": "inputs-and-outputs",
                                        "name": "Inputs, outputs and side effects",
                                        "description": "The resources a propulsion takes and the results it leaves, wanted or not.",
                                        "questions": [
                                            {
                                                "id": "inputs-and-outputs-q01",
                                                "text": "What identifies and describes the inputs and results of a propulsion, and in what units or vocabulary?",
                                                "kind": "definition",
                                                "answer_data": [
                                                    "identifiers",
                                                    "types and classes",
                                                    "values with units",
                                                    "explicit unknowns"
                                                ]
                                            },
                                            {
                                                "id": "inputs-and-outputs-q02",
                                                "text": "Who or what asserted this about the inputs and results of a propulsion, by which method, and when was it true?",
                                                "kind": "provenance",
                                                "answer_data": [
                                                    "authority",
                                                    "method",
                                                    "evidence",
                                                    "event time",
                                                    "knowledge time"
                                                ]
                                            },
                                            {
                                                "id": "inputs-and-outputs-q03",
                                                "text": "What may an agent decide or do once the inputs and results of a propulsion is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "definitions-in-contest",
                        "name": "Definitions and who holds them",
                        "description": "What propulsion is taken to mean, and by whom.",
                        "rationale": "When a field disagrees about a concept, the disagreement is the content. A model that picks one definition silently destroys the information.",
                        "layers": [
                            {
                                "id": "competing-definitions",
                                "name": "Competing definitions",
                                "description": "The main readings and the traditions behind them.",
                                "findings": [
                                    {
                                        "id": "definition-map",
                                        "name": "Definitions and their holders",
                                        "description": "Each definition with the school or body that holds it.",
                                        "questions": [
                                            {
                                                "id": "definition-map-q01",
                                                "text": "Which definitions of propulsion are in use, and which tradition or body holds each?",
                                                "kind": "definition"
                                            },
                                            {
                                                "id": "definition-map-q02",
                                                "text": "What turns on the difference between them in practice?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "operationalisation",
                                "name": "Operationalisation",
                                "description": "How it is measured or applied when it has to be.",
                                "findings": [
                                    {
                                        "id": "operational-record",
                                        "name": "Measures and proxies",
                                        "description": "Instruments and indicators used to stand in for it.",
                                        "questions": [
                                            {
                                                "id": "operational-record-q01",
                                                "text": "How is propulsion operationalised or measured in practice, and by what instrument?",
                                                "kind": "measurement"
                                            },
                                            {
                                                "id": "operational-record-q02",
                                                "text": "What does that operationalisation leave out, and when does that matter?",
                                                "kind": "boundary"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "instances-and-use",
                        "name": "Instances, use and consequence",
                        "description": "What counts as an instance of propulsion and what follows from calling something that.",
                        "rationale": "Applying a concept is an act with consequences, so a model must say what the label licenses and what it does not.",
                        "layers": [
                            {
                                "id": "instances",
                                "name": "What counts as an instance",
                                "description": "Clear cases, borderline cases and non-cases.",
                                "findings": [
                                    {
                                        "id": "instance-tests",
                                        "name": "Tests for an instance",
                                        "description": "What would settle whether something falls under it.",
                                        "questions": [
                                            {
                                                "id": "instance-tests-q01",
                                                "text": "What would settle whether something is an instance of propulsion?",
                                                "kind": "boundary"
                                            },
                                            {
                                                "id": "instance-tests-q02",
                                                "text": "Which borderline cases are argued about, and on what grounds?",
                                                "kind": "definition"
                                            }
                                        ]
                                    }
                                ]
                            },
                            {
                                "id": "consequence",
                                "name": "Consequence of application",
                                "description": "Rights, duties or decisions that follow from the label.",
                                "findings": [
                                    {
                                        "id": "consequence-record",
                                        "name": "What the label licenses",
                                        "description": "What an agent may do once something is classified this way.",
                                        "questions": [
                                            {
                                                "id": "consequence-record-q01",
                                                "text": "What follows practically once something is treated as propulsion?",
                                                "kind": "action"
                                            },
                                            {
                                                "id": "consequence-record-q02",
                                                "text": "What must an agent not infer from the label alone?",
                                                "kind": "action"
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    },
                    {
                        "id": "provenance-and-evidence",
                        "name": "Provenance, evidence and time",
                        "description": "Where every claim about a propulsion 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 propulsion and how confident it is.",
                                        "questions": [
                                            {
                                                "id": "claim-provenance-q01",
                                                "text": "What identifies and describes a claim about a propulsion, 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 propulsion, 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 propulsion 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 propulsion is retired without being erased.",
                                        "questions": [
                                            {
                                                "id": "validity-and-supersession-q01",
                                                "text": "What identifies and describes the validity of a claim about a propulsion, 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 propulsion, 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 propulsion is known, and what must it refuse?",
                                                "kind": "action",
                                                "answer_data": [
                                                    "permitted actions",
                                                    "preconditions",
                                                    "refusals",
                                                    "escalation"
                                                ]
                                            }
                                        ]
                                    }
                                ]
                            }
                        ]
                    }
                ]
            },
            "statistics": {
                "bundles": 6,
                "layers": 12,
                "findings": 14,
                "questions": 38
            }
        }
    }
}