{ "model": { "rank": 2506, "code": "thing-q13082", "model_id": "vr.tr.nuclear-fusion", "name": "nuclear fusion", "purpose": "Let an agent explain nuclear fusion in stars and in energy research accurately, distinguishing experimental milestones from commercial reality and flagging unconfirmed claims.", "family": "Thing Registry", "category": "Activities and processes", "status": "research-draft", "kind": "thing", "plane": "ACT", "domain": "ACT.PRC", "industry": "", "version": "", "url": "/models/thing/q13082/", "tier": 2, "score": 104, "payload": { "layer": "wikidata", "aliases": [ "cold fusion", "pyroelectric fusion", "deuterium-tritium fusion", "neon-burning process", "muon-catalyzed fusion", "inertial confinement fusion", "hydrogen fusion", "deuterium burning", "Pycnonuclear reaction", "CNO cycle", "proton–proton chain reaction", "silicon-burning process", "fusion power", "thermonuclear fusion", "magnetic confinement fusion", "Heavy ion fusion", "laser-driven inertial confinement fusion", "Magnetized Liner Inertial Fusion", "aneutronic fusion", "magnetic mirror" ], "aliasCount": 20, "merged": 20, "knownIn": 104, "facets": null, "markers": [], "lexicalClass": "", "senseRank": null, "alsoRegisteredAs": null, "source": { "dataset": "wikidata", "item": "Q13082", "url": "https://www.wikidata.org/wiki/Q13082", "license": "CC0 1.0" } }, "research": { "vercy": "1.0-draft", "publication": { "status": "research-draft", "adjudicationStatus": "unreviewed", "publishableCanonical": false, "generatedAt": "2026-09-11T10:55:24Z", "providers": [ "Claude" ], "breadth": "written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify", "pass": 2, "wave": 1, "engine": "claude" }, "metaModel": { "id": "THING-Q13082", "registryId": "vr.tr.nuclear-fusion", "name": "nuclear fusion", "version": "0.2.0-wave.1", "entryKind": "thing", "family": "Thing Registry", "domain": [ "ACT.PRC" ], "status": "research-draft" }, "canonicalUrl": "https://ver.cy/models/thing/q13082/", "model": { "registry_id": "vr.tr.nuclear-fusion", "name": "nuclear fusion", "purpose": "Let an agent explain nuclear fusion in stars and in energy research accurately, distinguishing experimental milestones from commercial reality and flagging unconfirmed claims.", "definition": "A nuclear reaction in which light atomic nuclei combine to form a heavier nucleus, releasing energy; it powers the Sun and stars and is pursued for electricity through magnetic and inertial confinement research, while claims of cold fusion remain unconfirmed.", "what_it_is_for": "Understanding stars and a potential future energy source.", "affordances": [ "explain fusion reactions and conditions", "describe research approaches", "assess claims of breakthroughs against sources", "compare with fission" ], "distinguishing_features": [ "Light nuclei combine", "Requires extreme temperature and pressure", "Powers stars", "Not yet commercial on Earth" ], "appearance": "Not visible directly; seen as starlight, plasma glow in devices and research facilities.", "visual_identification": [ "Tokamaks, stellarators and laser facilities", "Deuterium-tritium reactions", "Fission splits heavy nuclei instead" ], "physical_properties": [], "families_and_kinds": [ "stellar nucleosynthesis", "magnetic confinement fusion", "inertial confinement fusion", "deuterium-tritium fusion", "unconfirmed approaches such as cold fusion" ], "related_models": [ { "relation": "is a kind of", "target": "nuclear reaction", "why": "category" }, { "relation": "powers", "target": "star", "why": "natural setting" }, { "relation": "is pursued in", "target": "ITER and other fusion experiments", "why": "research" }, { "relation": "is contrasted with", "target": "nuclear fission", "why": "other reaction" } ], "identifiers": [], "standards_and_regulation": [ "Nuclear and radiation safety regulation for fusion facilities" ], "failure_modes_and_hazards": [ "Overstating how close commercial fusion is", "Repeating unconfirmed claims", "Confusing fusion with fission" ], "in_scope": [], "out_of_scope": [], "characteristics": [] }, "sources": [], "structure": { "bundles": [ { "id": "physics", "name": "Physics", "description": "How it works.", "rationale": "Physics sets conditions.", "layers": [ { "id": "reaction", "name": "Reaction", "description": "Nuclei.", "findings": [ { "id": "reaction-finding", "name": "Reaction", "description": "Fusion reaction.", "questions": [ { "text": "Which nuclei fuse and what products and energy result?", "kind": "definition" }, { "text": "What conditions are needed?", "kind": "measurement" } ] } ] }, { "id": "stars", "name": "Stars", "description": "Stellar fusion.", "findings": [ { "id": "stars-finding", "name": "Stars", "description": "Stellar fusion.", "questions": [ { "text": "How does fusion power the Sun?", "kind": "definition" }, { "text": "Which reaction chains dominate?", "kind": "definition" } ] } ] } ] }, { "id": "research", "name": "Research", "description": "Energy.", "rationale": "Research is ongoing.", "layers": [ { "id": "approaches", "name": "Approaches", "description": "Confinement.", "findings": [ { "id": "approaches-finding", "name": "Approaches", "description": "Research approaches.", "questions": [ { "text": "How do magnetic and inertial confinement differ?", "kind": "definition" }, { "text": "Which facilities pursue each?", "kind": "provenance" } ] } ] }, { "id": "milestones", "name": "Milestones", "description": "Results.", "findings": [ { "id": "milestones-finding", "name": "Milestones", "description": "Milestones.", "questions": [ { "text": "What milestone was reported, and what exactly was measured?", "kind": "provenance" }, { "text": "Does it mean net electricity to the grid?", "kind": "boundary" } ] } ] } ] }, { "id": "claims", "name": "Claims", "description": "Evaluating news.", "rationale": "Claims need scrutiny.", "layers": [ { "id": "verify", "name": "Verify", "description": "Peer review.", "findings": [ { "id": "verify-finding", "name": "Verify", "description": "Verification.", "questions": [ { "text": "Has the claimed result been peer reviewed and replicated?", "kind": "boundary" }, { "text": "Which sources confirm it?", "kind": "provenance" } ] } ] }, { "id": "cold", "name": "Cold fusion", "description": "Unconfirmed.", "findings": [ { "id": "cold-finding", "name": "Cold fusion", "description": "Unconfirmed claims.", "questions": [ { "text": "Is a cold fusion or similar claim scientifically confirmed?", "kind": "boundary" }, { "text": "What do reviews conclude?", "kind": "provenance" } ] } ] } ] }, { "id": "comparison", "name": "Comparison", "description": "Energy context.", "rationale": "Context matters.", "layers": [ { "id": "fission", "name": "Fission", "description": "Differences.", "findings": [ { "id": "fission-finding", "name": "Fission", "description": "Fusion versus fission.", "questions": [ { "text": "How does fusion differ from fission in fuel, waste and safety?", "kind": "definition" }, { "text": "Which sources explain it?", "kind": "provenance" } ] } ] }, { "id": "timeline", "name": "Timeline", "description": "Commercial prospects.", "findings": [ { "id": "timeline-finding", "name": "Timeline", "description": "Commercial prospects.", "questions": [ { "text": "What do independent assessments say about timelines to commercial fusion?", "kind": "provenance" }, { "text": "How uncertain are they?", "kind": "boundary" } ] } ] } ] } ] }, "openQuestions": [ "Should confinement approaches be separate entries?", "How should milestones be sourced?", "How should unconfirmed claims be flagged?" ], "statistics": { "bundles": 4, "layers": 8, "findings": 8, "questions": 16 } }, "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. This entry carries no facets of its own, so they were inferred from its domain - a guess about a whole domain applied to one thing.", "facetsInferred": true, "nextPass": "A researcher replaces this draft with a sourced specification. Treat every sentence below as a proposal to argue with.", "purpose": "Give an agent a durable, checkable way to recognise a nuclear fusion, record what state it is in, and decide what may be done with it.", "whatItIs": "Let an agent explain nuclear fusion in stars and in energy research accurately, distinguishing experimental milestones from commercial reality and flagging unconfirmed claims.", "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: cold fusion, pyroelectric fusion, deuterium-tritium fusion, neon-burning process, muon-catalyzed fusion, inertial confinement fusion, hydrogen fusion, deuterium burning, Pycnonuclear reaction, CNO cycle, proton–proton chain reaction, silicon-burning process.", "20 finer distinctions are held as aliases rather than separate entries, because telling them apart needs a task that asks for it.", "Described in 104 Wikipedia languages, which is a measure of how widely the thing is known, not of how important it is." ], "openQuestionsForResearch": [ "Which of the bundles below does a real task actually need, and which are ceremony?", "What does this thing have that the facets do not capture at all?", "Which neighbouring kind is most often confused with a nuclear fusion, 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.", "These come from the domain this entry sits in rather than from the entry itself, so treat them as a first guess about the whole domain applied to one thing." ], "whatCanBeDoneWithIt": [ "observe it, measure it, record its state" ], "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": [ "cold fusion", "pyroelectric fusion", "deuterium-tritium fusion", "neon-burning process", "muon-catalyzed fusion", "inertial confinement fusion", "hydrogen fusion", "deuterium burning", "Pycnonuclear reaction", "CNO cycle", "proton–proton chain reaction", "silicon-burning process" ] } ], "standing": "Described in 104 Wikipedia languages, which measures how widely it is written about rather than how important or how common it is. 20 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 nuclear fusion from another, and a nuclear fusion 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 nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 nuclear fusion 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 nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 nuclear fusion from the things most often confused with it.", "questions": [ { "id": "distinguishing-features-q01", "text": "What identifies and describes what distinguishes a nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 nuclear fusion 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 nuclear fusion between them.", "questions": [ { "id": "stages-and-transitions-q01", "text": "What identifies and describes the lifecycle of a nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 nuclear fusion, how often and by whom.", "findings": [ { "id": "observation-record", "name": "Observation record", "description": "How an observation of a nuclear fusion 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 nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 nuclear fusion 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 nuclear fusion, 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 nuclear fusion and what marks it done.", "questions": [ { "id": "steps-and-preconditions-q01", "text": "What identifies and describes a step of a nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 nuclear fusion consumes and what it produces.", "findings": [ { "id": "inputs-and-outputs", "name": "Inputs, outputs and side effects", "description": "The resources a nuclear fusion 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 nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 nuclear fusion 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 nuclear fusion 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 nuclear fusion 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 nuclear fusion 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 nuclear fusion?", "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 nuclear fusion?", "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 nuclear fusion 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 nuclear fusion and how confident it is.", "questions": [ { "id": "claim-provenance-q01", "text": "What identifies and describes a claim about a nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 nuclear fusion is retired without being erased.", "questions": [ { "id": "validity-and-supersession-q01", "text": "What identifies and describes the validity of a claim about a nuclear fusion, 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 nuclear fusion, 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 nuclear fusion 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 } } } }