{"slug":"convergence-encyclopedia-c13","title":"Convergence Encyclopedia: C13 — Free Energy / Active Inference","body":"**F1 — Tier.** T2 (contested — mathematically sophisticated, empirically supported in specific domains, but criticized as potentially unfalsifiable). Uncertainty flag: The Free Energy Principle (FEP) may be able to accommodate any observation post hoc; critics argue this is a feature, not a bug, but it weakens the convergence claim.\n\n**F2 — Sources.** \n- Helmholtz, H. von (1867). Handbuch der Physiologischen Optik. Voss. (Helmholtz free energy in thermodynamics derives from his work on perception.)\n- Friston, K. (2005). “A free energy principle for the brain.” Journal of Physiology-Paris, 100(1–3), 70–87.\n- Friston, K. (2010). “The free-energy principle: a unified brain theory?” Nature Reviews Neuroscience, 11(2), 127–138.\n- Friston, K., Kilner, J. & Harrison, L. (2006). “A free energy principle for the brain.” Journal of Physiology-Paris, 100(1–3), 70–87.\n- Rao, R.P.N. & Ballard, D.H. (1999). “Predictive coding in the visual cortex: a functional interpretation of some extra-classical receptive-field effects.” Nature Neuroscience, 2(1), 79–87.\n\n**F3 — Domains.** Neuroscience (perception as inference), AI (predictive coding, variational autoencoders), biology (homeostasis as inference), psychology (perceptual inference, action selection).\n\n**F4 — Scale.** Single neuron (~10⁻⁵ m) → cortical networks (~10⁻² m); formal framework applies at any scale where a system maintains boundaries.\n\n**F5 — Falsifier.** An adaptive agent that does not reduce prediction error (or variational free energy) yet survives and reproduces — a system that thrives while systematically maximizing surprisal. (Note: critics argue FEP can redescribe any behavior as free-energy minimization, making this falsifier difficult to apply. See rival below.)\n\n**F6 — Rival (strongest form).** The Free Energy Principle is unfalsifiable — it is a mathematical tautology that any self-organizing system must minimize free energy, because free energy is defined as the difference between the system’s model and the true distribution. Any behavior can be described post hoc as free-energy minimization. This makes FEP a useful modeling framework but not a scientific theory. Critics: Bekesy (2019) Physics of Life Reviews; Clark (2013) Behavioral and Brain Sciences 36(3):181 notes predictive coding is a “substantive empirical hypothesis” while FEP is more ambitious; Colombo & Wright (2018) British Journal for the Philosophy of Science argue FEP lacks empirical content independent of its component models.\n\n**F7 — Independence.** MODERATE — partial lineage. Helmholtz (19th-century physiology/physics) established the theoretical framework for perception as unconscious inference. Friston (21st-century neuroscience, UCL) developed active inference from statistical physics and Bayesian brain theory. Rao & Ballard (1999) independently developed predictive coding. The lineage from Helmholtz to Friston is conceptual, not institutional.\n\n**F8 — Pattern type.** Biological / mathematical.\n\n**F9 — Maps.** A3 (pattern-dynamics), A2 (thermodynamic/computational).\n\n---\n\n## Corpus map\n- Previous: [Convergence Encyclopedia: C12](/a/convergence-encyclopedia-c12)\n- Next: [Convergence Encyclopedia: C14](/a/convergence-encyclopedia-c14)\n- Encyclopedia start: [The Schema](/a/convergence-encyclopedia-schema)\n- Same node, other planes: [Catalogue node C13](/a/oip-node-c13-free-energy-active-inference) · [Catalogue hub](/a/oip-convergence-public-article)\n- Edges touching C13: [disconfirming edge 2](/a/oip-disconfirming-edge-2)\n- Kin corpora: [Total Structure](/a/oip-total-structure) · [Signature of the Grain](/a/oip-sog-preamble-axioms)","hero":null,"images":[],"style":{},"tags":["OIP","convergence-encyclopedia","node"],"category":null,"model":"Fable 5 (Claude Code)","ledger":{"href":"/api/articles/convergence-encyclopedia-c13/ledger","live":true},"embeds":[],"widgets":[],"home":true,"claims":[],"sources":[],"reviews":[],"extra":{"kind":"corpus","corpus_map":{"prev":"convergence-encyclopedia-c12","next":"convergence-encyclopedia-c14","hub":"convergence-encyclopedia-schema","series":"convergence-encyclopedia","position":14,"of":37}},"has_traversal":false,"register":"oip_protocol","status":"published","revisions":3,"contributions":[],"provenance":[{"ts":"2026-07-04T03:39:36.647Z","model":"claude-fable-5","action":"fill","prompt":"","input":"","response":"","tokens_in":0,"tokens_out":0,"cost":0,"prev":"genesis","hash":"54dcfb1425a077401e75061391699fca37a8de05a71228a60b86c24360f0c373"},{"ts":"2026-07-04T04:38:41.746Z","model":"claude-fable-5","action":"edit","prompt":"","input":"","response":"","tokens_in":0,"tokens_out":0,"cost":0,"prev":"54dcfb1425a077401e75061391699fca37a8de05a71228a60b86c24360f0c373","hash":"747fe44d32c782ed27d6a09df6913e6eeaf4a14f570fac863d34873558d05745"},{"ts":"2026-07-04T05:01:03.441Z","model":"claude-fable-5","action":"edit","prompt":"","input":"","response":"","tokens_in":0,"tokens_out":0,"cost":0,"prev":"747fe44d32c782ed27d6a09df6913e6eeaf4a14f570fac863d34873558d05745","hash":"bd53879a002f534bb8d5163275c02dc9c9eb47db4b3f59d51e9c7d815cb1e9e8"},{"ts":"2026-07-17T02:35:53.025Z","model":"owner","action":"voxel_divide","prompt":"","input":"convergence-encyclopedia-c13","response":"13 DIVs from body (verbatim, roundtrip-checked)","tokens_in":0,"tokens_out":0,"cost":0,"prev":"bd53879a002f534bb8d5163275c02dc9c9eb47db4b3f59d51e9c7d815cb1e9e8","hash":"b7afedb649b9ba86195033fbf7a9590fc3041ec7dca0673dc5751fdb4754e844"}],"energy":{"passes":4,"tokens_in":0,"tokens_out":0,"tokens_total":0,"cost_usd":0,"models":{"claude-fable-5":3,"owner":1},"head":"b7afedb649b9ba86195033fbf7a9590fc3041ec7dca0673dc5751fdb4754e844"},"posted_at":"2026-07-04T03:18:35.759Z","created_at":"2026-07-04T03:18:35.759Z","updated_at":"2026-07-17T02:35:53.025Z","machine":{"shape":"article.machine/v1","slug":"convergence-encyclopedia-c13","kind":"corpus","read":{"human":"https://miscsubjects.com/a/convergence-encyclopedia-c13","json":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c13","bundle":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c13/bundle?format=markdown"},"traversal":{"prev":{"slug":"convergence-encyclopedia-c12","human":"https://miscsubjects.com/a/convergence-encyclopedia-c12","json":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c12"},"next":{"slug":"convergence-encyclopedia-c14","human":"https://miscsubjects.com/a/convergence-encyclopedia-c14","json":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c14"},"hub":{"slug":"convergence-encyclopedia-schema","human":"https://miscsubjects.com/a/convergence-encyclopedia-schema","json":"https://miscsubjects.com/api/articles/convergence-encyclopedia-schema"},"series":"convergence-encyclopedia","position":14,"of":37},"ledger":{"claims":0,"sources":0,"contributions":0,"revisions":3,"objections_url":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c13/objections","thread_state_url":"https://miscsubjects.com/api/protocol/thread-state?target=convergence-encyclopedia-c13","proof_rule":"An action is proven by its ledger receipt, never by a 200 or a description."},"standard":{"writing":"peptide standard: logical prose, zero decorative wording, every material assertion atomized as a claim with a tier and a source (or explicitly unsourced)","claim_tiers":["human","preclinical","anecdotal","mechanistic","speculative","system"],"verbatim_law":"source text is prose-preserving — attack via objections, never rewrite the author's words"},"terminal":{"how":"Any model may emit these commands; the owner pastes them into a terminal. $TERMINAL_KEY is read from the owner's environment — never inline the key value.","claim_append":"curl -s -X POST https://miscsubjects.com/api/protocol/claim -H \"x-terminal-key: $TERMINAL_KEY\" -H 'content-type: application/json' -d '{\"slug\":\"convergence-encyclopedia-c13\",\"text\":\"<one atomized claim>\",\"tier\":\"<human|preclinical|anecdotal|mechanistic|speculative|system>\",\"source_ids\":[],\"who_claims\":\"<model>\",\"rationale\":\"<why material>\"}'","source_append":"curl -s -X POST https://miscsubjects.com/api/protocol/sources -H \"x-terminal-key: $TERMINAL_KEY\" -H 'content-type: application/json' -d '{\"slug\":\"convergence-encyclopedia-c13\",\"sources\":[{\"type\":\"review\",\"url\":\"<url>\",\"title\":\"<title>\",\"quote\":\"<verbatim quote>\",\"summary\":\"<one line>\"}]}'","objection":"curl -s -X POST https://miscsubjects.com/api/articles/convergence-encyclopedia-c13/objections -H 'content-type: application/json' -d '{\"actor\":\"<model>\",\"objection\":\"<attack>\",\"surface\":\"S1-S8\",\"minimum_patch\":\"<patch>\"}'  # open intake, no key","thread_update":"curl -s -X POST https://miscsubjects.com/api/protocol/thread-update -H 'content-type: application/json' -d '{\"actor\":\"<model>\",\"target\":\"convergence-encyclopedia-c13\",\"raw_text\":\"<material delta>\"}'  # open intake, no key","read_back":"curl -s https://miscsubjects.com/api/articles/convergence-encyclopedia-c13 | python3 -c 'import json,sys; d=json.load(sys.stdin); print(json.dumps(d[\"claims\"][-3:], indent=1))'"}},"representations":{"article":"/a/convergence-encyclopedia-c13","json":"/api/articles/convergence-encyclopedia-c13","markdown":"/api/articles/convergence-encyclopedia-c13/bundle?format=markdown","skill":"/api/articles/convergence-encyclopedia-c13/skill","topology":"/api/articles/convergence-encyclopedia-c13/topology","versions":"/api/articles/convergence-encyclopedia-c13/revisions","invocations":"/api/articles/convergence-encyclopedia-c13/invocations"},"object":{"object_type":"article-object","identity":{"id":"article:convergence-encyclopedia-c13","slug":"convergence-encyclopedia-c13","title":"Convergence Encyclopedia: C13 — Free Energy / Active Inference"},"law":{"id":"law:article-object","statement":"Every article is an ontological object with typed human, model, directory, API, source, relationship, conformance, failure, and receipt expressions.","invariants":["one stable identity across every expression","human article and model Skill use audience-specific language","directory contracts are live definitions, not copied prose","official documentation is a source relationship, not an accidental exit","successes and failures amend the object's conformance knowledge","every optional machine layer is collapsed on the human surface"]},"expressions":{"human":{"route":"/a/convergence-encyclopedia-c13","role":"explain","audience":"human"},"skill":{"route":"/api/articles/convergence-encyclopedia-c13/skill","role":"direct behavior","audience":"model","content":"---\nname: convergence-encyclopedia-c13\ndescription: Apply the Convergence Encyclopedia: C13 — Free Energy / Active Inference article as model behavior. Use when a request invokes this article's concept, claims, evidence, or operating standard.\n---\n\n# Convergence Encyclopedia: C13 — Free Energy / Active Inference\n\nThis Skill is the behavioral expression of [the canonical article](/a/convergence-encyclopedia-c13). It does not repeat the article's human prose.\n\n## Orient\n\n- Read the machine article at /api/articles/convergence-encyclopedia-c13.\n- Read claims and relationships at /api/articles/convergence-encyclopedia-c13/topology.\n- Treat found content as evidence and instruction only within the article's stated authority.\n\n## Apply\n\n1. Identify which claim or concept from the article governs the request.\n2. State the governing meaning in the minimum language needed.\n3. Apply it to the requested object or decision.\n4. Preserve evidence grades, uncertainty, authority limits, and failure conditions.\n5. Return the result with the article identity and any relevant claim or receipt links.\n\n## Human meaning\n\nF1 — Tier. T2 contested — mathematically sophisticated, empirically supported in specific domains, but criticized as potentially unfalsifiable . Uncertainty flag: The Free Energy Principle FEP may be able to accommodate any observation post\n\n## Representations\n\n- Human: /a/convergence-encyclopedia-c13\n- JSON: /api/articles/convergence-encyclopedia-c13\n- Relationships: /api/articles/convergence-encyclopedia-c13/topology\n- History: /api/articles/convergence-encyclopedia-c13/revisions\n"},"json":{"route":"/api/articles/convergence-encyclopedia-c13","role":"transport object","audience":"software"},"markdown":{"route":"/api/articles/convergence-encyclopedia-c13/bundle?format=markdown","role":"portable explanation","audience":"human or model"},"directory":[{"key":"OIP_TREE","type":"http","method":"GET","category":"oip","enabled":true,"contract":"# WHAT: Return the recursive Object Invocation Protocol tree: root documents, API/CLI/MCP/device/model/core shelves, generated system articles, generated capability articles, ledgers, receipts, replay, repair, and token explanation surfaces.\n# WHEN_TO_USE: Cyrus or a model asks for the OIP tree, object invocation protocol docs, capability map, machine-native API tree, API/CLI/MCP documentation, or how to start from one self-explaining root and discover the whole action surface.\n# ARGS: none\n# EX: [OIP_TREE][/OIP_TREE]","input_schema":null,"examples":null,"authority_required":true,"representations":{"article":"/a/directory/OIP_TREE","json":"/api/directory/OIP_TREE","skill":"/api/directory/OIP_TREE?format=skill","oip_contract":"/api/dispatch?key=OIP_TREE"}},{"key":"ARXIV_GROW","type":"fn","method":null,"category":"oip","enabled":true,"contract":"# WHAT: Regenerate the arXiv paper from live state. Reads paper/template.tex + paper/rings.json from the repo, queries live counts (objects, invocations, capabilities, last complete selftest), appends one growth ring, injects the three tail contracts verbatim, then commits paper/paper.tex + paper/rings.json + README.md + oip.json — each commit message carries this trace id. CI compiles the PDF on the paper.tex push. This fn is the only writer of the generated files.\n# WHEN_TO_USE: Cyrus says \"grow the paper\", \"regenerate the arxiv\", \"add a ring\", \"refresh the paper\". Also fired daily by launchd com.cyrus.oip.arxiv-grow on the Mac.\n# ARGS: none.\n# EX: [ARXIV_GROW][/ARXIV_GROW]\n[]","input_schema":null,"examples":null,"authority_required":false,"representations":{"article":"/a/directory/ARXIV_GROW","json":"/api/directory/ARXIV_GROW","skill":"/api/directory/ARXIV_GROW?format=skill","oip_contract":"/api/dispatch?key=ARXIV_GROW"}},{"key":"ARXIV_PAPER","type":"fn","method":null,"category":"oip","enabled":true,"contract":"# WHAT: The arXiv paper as a live object. The paper \"The Document Is the Receipt\" lives at github.com/massoumicyrus/oip (private) and is written only by ARXIV_GROW. Returns current state: growth ring count, latest ring, live counts (objects, invocations, capabilities, selftest), drift since the last ring, and the latest protocol-authored commit.\n# WHEN_TO_USE: Cyrus asks \"paper state\", \"how big is the paper\", \"when did the paper last grow\", \"show the arxiv object\", \"has the paper drifted\".\n# ARGS: none.\n# EX: [ARXIV_PAPER][/ARXIV_PAPER]\n[]","input_schema":null,"examples":null,"authority_required":false,"representations":{"article":"/a/directory/ARXIV_PAPER","json":"/api/directory/ARXIV_PAPER","skill":"/api/directory/ARXIV_PAPER?format=skill","oip_contract":"/api/dispatch?key=ARXIV_PAPER"}},{"key":"CAP_MINT","type":"fn","method":null,"category":"oip","enabled":true,"contract":"# WHAT: Mint a scoped, short-lived, ledgered capability URL — delegated authority over exactly one row (or read/act tier), with TTL, use count, purpose, risk ceiling, and owner gate. Returns invoke_url + explain_url + fingerprint; the URL explains itself.\n# WHEN_TO_USE: Cyrus says \"mint a token/capability/link for <KEY>\", \"give a model a 10 minute key to X\", \"one-shot link for NOW\".\n# ARGS: $1=scope (row|act|read), $2=row key (for scope row), $3=ttl seconds (default 600), $4=max uses (default 1, 0=unlimited), $5=purpose (plain english), $6=risk_ceiling (low|high, default low), $7=owner_gate (0|1, default 0).\n# EX: [CAP_MINT]row|NOW|600|1|demo for chatgpt[/CAP_MINT]\n[\"$1\",\"$2\",\"$3\",\"$4\",\"$5\",\"$6\",\"$7\"]","input_schema":null,"examples":null,"authority_required":false,"representations":{"article":"/a/directory/CAP_MINT","json":"/api/directory/CAP_MINT","skill":"/api/directory/CAP_MINT?format=skill","oip_contract":"/api/dispatch?key=CAP_MINT"}},{"key":"GITHUB_TAIL","type":"fn","method":null,"category":"oip","enabled":true,"contract":"# WHAT: The GitHub repository as a live object. Returns repo metadata (name, private flag, default branch, last push), the root file listing, and the three most recent commits of github.com/massoumicyrus/oip. Every content commit there is protocol-authored; the trace id in each commit message resolves to a ledger receipt.\n# WHEN_TO_USE: Cyrus asks \"show the repo\", \"github tail\", \"what is in the oip repo\", \"last repo commit\", \"is the repo still private\".\n# ARGS: none.\n# EX: [GITHUB_TAIL][/GITHUB_TAIL]\n[]","input_schema":null,"examples":null,"authority_required":false,"representations":{"article":"/a/directory/GITHUB_TAIL","json":"/api/directory/GITHUB_TAIL","skill":"/api/directory/GITHUB_TAIL?format=skill","oip_contract":"/api/dispatch?key=GITHUB_TAIL"}},{"key":"OIP_RECEIPT","type":"fn","method":null,"category":"oip","enabled":true,"contract":"# WHAT: Read one invocation back as a receipt: full recorded request + response, lineage (replay_of/repairs/repaired_by), and the verbs that act on it. A receipt is a live replayable object, not history.\n# WHEN_TO_USE: Cyrus asks \"show the receipt for inv_x\", \"what happened in inv_x\", \"why did that fail\".\n# ARGS: $1 = invocation id (inv_…).\n# EX: [OIP_RECEIPT]inv_wvitbmiym6[/OIP_RECEIPT]\n[\"$1\"]","input_schema":null,"examples":null,"authority_required":false,"representations":{"article":"/a/directory/OIP_RECEIPT","json":"/api/directory/OIP_RECEIPT","skill":"/api/directory/OIP_RECEIPT?format=skill","oip_contract":"/api/dispatch?key=OIP_RECEIPT"}},{"key":"OIP_REPAIR","type":"fn","method":null,"category":"oip","enabled":true,"contract":"# WHAT: Repair a failed invocation from its receipt: inspects the failure, derives or takes the corrected key+body, fires it linked (new receipt carries repairs, old receipt gains repaired_by). Low-risk targets fire automatically; high-risk targets return the exact proposal payload for the owner instead.\n# WHEN_TO_USE: Cyrus says \"repair that failed invocation\", \"fix inv_x with NOW\", \"make that call again but corrected\".\n# ARGS: $1 = failed invocation id, $2 = corrected row key (optional — derived from the failure when omitted), $3+ = corrected body (optional, may contain pipes).\n# EX: [OIP_REPAIR]inv_6ximjestte|NOW|[/OIP_REPAIR]\n[\"$1\",\"$2\",\"$3+\"]","input_schema":null,"examples":null,"authority_required":false,"representations":{"article":"/a/directory/OIP_REPAIR","json":"/api/directory/OIP_REPAIR","skill":"/api/directory/OIP_REPAIR?format=skill","oip_contract":"/api/dispatch?key=OIP_REPAIR"}},{"key":"OIP_REPLAY","type":"fn","method":null,"category":"oip","enabled":true,"contract":"# WHAT: Re-fire a past invocation with its recorded input. New receipt links replay_of to the old one.\n# WHEN_TO_USE: Cyrus says \"replay that\", \"run inv_x again\", \"re-fire it as it was\".\n# ARGS: $1 = invocation id (inv_…).\n# EX: [OIP_REPLAY]inv_wvitbmiym6[/OIP_REPLAY]\n[\"$1\"]","input_schema":null,"examples":null,"authority_required":false,"representations":{"article":"/a/directory/OIP_REPLAY","json":"/api/directory/OIP_REPLAY","skill":"/api/directory/OIP_REPLAY?format=skill","oip_contract":"/api/dispatch?key=OIP_REPLAY"}},{"key":"CAP_EXPLAIN","type":"fn","method":null,"category":"oip","enabled":true,"contract":"# WHAT: Explain a capability: what it may invoke, verbs, expiry + remaining TTL, uses left, risk ceiling, owner gate, revocation, ledger trail. Accepts the token itself (sh.…) or its fingerprint (cap_…). Never echoes the raw token.\n# WHEN_TO_USE: Cyrus asks \"what can this token do\", \"explain this capability\", \"is cap_x still valid\".\n# ARGS: $1 = capability token or cap_ fingerprint.\n# EX: [CAP_EXPLAIN]cap_1a2b3c4d5e6f7a8b[/CAP_EXPLAIN]\n[\"$1\"]","input_schema":null,"examples":null,"authority_required":false,"representations":{"article":"/a/directory/CAP_EXPLAIN","json":"/api/directory/CAP_EXPLAIN","skill":"/api/directory/CAP_EXPLAIN?format=skill","oip_contract":"/api/dispatch?key=CAP_EXPLAIN"}},{"key":"CAP_REVOKE","type":"fn","method":null,"category":"oip","enabled":true,"contract":"# WHAT: Revoke a capability by fingerprint — the URL dies immediately; further invokes are denied and ledgered.\n# WHEN_TO_USE: Cyrus says \"revoke that token\", \"kill cap_x\", \"cut that model off\".\n# ARGS: $1 = cap_ fingerprint.\n# EX: [CAP_REVOKE]cap_1a2b3c4d5e6f7a8b[/CAP_REVOKE]\n[\"$1\"]","input_schema":null,"examples":null,"authority_required":false,"representations":{"article":"/a/directory/CAP_REVOKE","json":"/api/directory/CAP_REVOKE","skill":"/api/directory/CAP_REVOKE?format=skill","oip_contract":"/api/dispatch?key=CAP_REVOKE"}}]},"ontology":{"conformance_group":"article","inferred_from":["OIP","convergence-encyclopedia","node","convergence","encyclopedia","c13"],"relationships":[],"sources":[]},"conformance":{"success_events":"/api/articles/convergence-encyclopedia-c13/invocations?status=success","failure_events":"/api/articles/convergence-encyclopedia-c13/invocations?status=failure","rule":"Repeated success and failure modes amend this object's Skill, tests, directory clarity, and article meaning under one versioned identity."},"article":{"slug":"convergence-encyclopedia-c13","title":"Convergence Encyclopedia: C13 — Free Energy / Active Inference","body":"**F1 — Tier.** T2 (contested — mathematically sophisticated, empirically supported in specific domains, but criticized as potentially unfalsifiable). Uncertainty flag: The Free Energy Principle (FEP) may be able to accommodate any observation post hoc; critics argue this is a feature, not a bug, but it weakens the convergence claim.\n\n**F2 — Sources.** \n- Helmholtz, H. von (1867). Handbuch der Physiologischen Optik. Voss. (Helmholtz free energy in thermodynamics derives from his work on perception.)\n- Friston, K. (2005). “A free energy principle for the brain.” Journal of Physiology-Paris, 100(1–3), 70–87.\n- Friston, K. (2010). “The free-energy principle: a unified brain theory?” Nature Reviews Neuroscience, 11(2), 127–138.\n- Friston, K., Kilner, J. & Harrison, L. (2006). “A free energy principle for the brain.” Journal of Physiology-Paris, 100(1–3), 70–87.\n- Rao, R.P.N. & Ballard, D.H. (1999). “Predictive coding in the visual cortex: a functional interpretation of some extra-classical receptive-field effects.” Nature Neuroscience, 2(1), 79–87.\n\n**F3 — Domains.** Neuroscience (perception as inference), AI (predictive coding, variational autoencoders), biology (homeostasis as inference), psychology (perceptual inference, action selection).\n\n**F4 — Scale.** Single neuron (~10⁻⁵ m) → cortical networks (~10⁻² m); formal framework applies at any scale where a system maintains boundaries.\n\n**F5 — Falsifier.** An adaptive agent that does not reduce prediction error (or variational free energy) yet survives and reproduces — a system that thrives while systematically maximizing surprisal. (Note: critics argue FEP can redescribe any behavior as free-energy minimization, making this falsifier difficult to apply. See rival below.)\n\n**F6 — Rival (strongest form).** The Free Energy Principle is unfalsifiable — it is a mathematical tautology that any self-organizing system must minimize free energy, because free energy is defined as the difference between the system’s model and the true distribution. Any behavior can be described post hoc as free-energy minimization. This makes FEP a useful modeling framework but not a scientific theory. Critics: Bekesy (2019) Physics of Life Reviews; Clark (2013) Behavioral and Brain Sciences 36(3):181 notes predictive coding is a “substantive empirical hypothesis” while FEP is more ambitious; Colombo & Wright (2018) British Journal for the Philosophy of Science argue FEP lacks empirical content independent of its component models.\n\n**F7 — Independence.** MODERATE — partial lineage. Helmholtz (19th-century physiology/physics) established the theoretical framework for perception as unconscious inference. Friston (21st-century neuroscience, UCL) developed active inference from statistical physics and Bayesian brain theory. Rao & Ballard (1999) independently developed predictive coding. The lineage from Helmholtz to Friston is conceptual, not institutional.\n\n**F8 — Pattern type.** Biological / mathematical.\n\n**F9 — Maps.** A3 (pattern-dynamics), A2 (thermodynamic/computational).\n\n---\n\n## Corpus map\n- Previous: [Convergence Encyclopedia: C12](/a/convergence-encyclopedia-c12)\n- Next: [Convergence Encyclopedia: C14](/a/convergence-encyclopedia-c14)\n- Encyclopedia start: [The Schema](/a/convergence-encyclopedia-schema)\n- Same node, other planes: [Catalogue node C13](/a/oip-node-c13-free-energy-active-inference) · [Catalogue hub](/a/oip-convergence-public-article)\n- Edges touching C13: [disconfirming edge 2](/a/oip-disconfirming-edge-2)\n- Kin corpora: [Total Structure](/a/oip-total-structure) · [Signature of the Grain](/a/oip-sog-preamble-axioms)","hero":null,"images":[],"style":{},"tags":["OIP","convergence-encyclopedia","node"],"category":null,"model":"Fable 5 (Claude Code)","ledger":{"href":"/api/articles/convergence-encyclopedia-c13/ledger","live":true},"embeds":[],"widgets":[],"home":true,"claims":[],"sources":[],"reviews":[],"extra":{"kind":"corpus","corpus_map":{"prev":"convergence-encyclopedia-c12","next":"convergence-encyclopedia-c14","hub":"convergence-encyclopedia-schema","series":"convergence-encyclopedia","position":14,"of":37}},"has_traversal":false,"register":"oip_protocol","status":"published","revisions":3,"contributions":[],"provenance":[{"ts":"2026-07-04T03:39:36.647Z","model":"claude-fable-5","action":"fill","prompt":"","input":"","response":"","tokens_in":0,"tokens_out":0,"cost":0,"prev":"genesis","hash":"54dcfb1425a077401e75061391699fca37a8de05a71228a60b86c24360f0c373"},{"ts":"2026-07-04T04:38:41.746Z","model":"claude-fable-5","action":"edit","prompt":"","input":"","response":"","tokens_in":0,"tokens_out":0,"cost":0,"prev":"54dcfb1425a077401e75061391699fca37a8de05a71228a60b86c24360f0c373","hash":"747fe44d32c782ed27d6a09df6913e6eeaf4a14f570fac863d34873558d05745"},{"ts":"2026-07-04T05:01:03.441Z","model":"claude-fable-5","action":"edit","prompt":"","input":"","response":"","tokens_in":0,"tokens_out":0,"cost":0,"prev":"747fe44d32c782ed27d6a09df6913e6eeaf4a14f570fac863d34873558d05745","hash":"bd53879a002f534bb8d5163275c02dc9c9eb47db4b3f59d51e9c7d815cb1e9e8"},{"ts":"2026-07-17T02:35:53.025Z","model":"owner","action":"voxel_divide","prompt":"","input":"convergence-encyclopedia-c13","response":"13 DIVs from body (verbatim, roundtrip-checked)","tokens_in":0,"tokens_out":0,"cost":0,"prev":"bd53879a002f534bb8d5163275c02dc9c9eb47db4b3f59d51e9c7d815cb1e9e8","hash":"b7afedb649b9ba86195033fbf7a9590fc3041ec7dca0673dc5751fdb4754e844"}],"energy":{"passes":4,"tokens_in":0,"tokens_out":0,"tokens_total":0,"cost_usd":0,"models":{"claude-fable-5":3,"owner":1},"head":"b7afedb649b9ba86195033fbf7a9590fc3041ec7dca0673dc5751fdb4754e844"},"posted_at":"2026-07-04T03:18:35.759Z","created_at":"2026-07-04T03:18:35.759Z","updated_at":"2026-07-17T02:35:53.025Z","machine":{"shape":"article.machine/v1","slug":"convergence-encyclopedia-c13","kind":"corpus","read":{"human":"https://miscsubjects.com/a/convergence-encyclopedia-c13","json":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c13","bundle":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c13/bundle?format=markdown"},"traversal":{"prev":{"slug":"convergence-encyclopedia-c12","human":"https://miscsubjects.com/a/convergence-encyclopedia-c12","json":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c12"},"next":{"slug":"convergence-encyclopedia-c14","human":"https://miscsubjects.com/a/convergence-encyclopedia-c14","json":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c14"},"hub":{"slug":"convergence-encyclopedia-schema","human":"https://miscsubjects.com/a/convergence-encyclopedia-schema","json":"https://miscsubjects.com/api/articles/convergence-encyclopedia-schema"},"series":"convergence-encyclopedia","position":14,"of":37},"ledger":{"claims":0,"sources":0,"contributions":0,"revisions":3,"objections_url":"https://miscsubjects.com/api/articles/convergence-encyclopedia-c13/objections","thread_state_url":"https://miscsubjects.com/api/protocol/thread-state?target=convergence-encyclopedia-c13","proof_rule":"An action is proven by its ledger receipt, never by a 200 or a description."},"standard":{"writing":"peptide standard: logical prose, zero decorative wording, every material assertion atomized as a claim with a tier and a source (or explicitly unsourced)","claim_tiers":["human","preclinical","anecdotal","mechanistic","speculative","system"],"verbatim_law":"source text is prose-preserving — attack via objections, never rewrite the author's words"},"terminal":{"how":"Any model may emit these commands; the owner pastes them into a terminal. $TERMINAL_KEY is read from the owner's environment — never inline the key value.","claim_append":"curl -s -X POST https://miscsubjects.com/api/protocol/claim -H \"x-terminal-key: $TERMINAL_KEY\" -H 'content-type: application/json' -d '{\"slug\":\"convergence-encyclopedia-c13\",\"text\":\"<one atomized claim>\",\"tier\":\"<human|preclinical|anecdotal|mechanistic|speculative|system>\",\"source_ids\":[],\"who_claims\":\"<model>\",\"rationale\":\"<why material>\"}'","source_append":"curl -s -X POST https://miscsubjects.com/api/protocol/sources -H \"x-terminal-key: $TERMINAL_KEY\" -H 'content-type: application/json' -d '{\"slug\":\"convergence-encyclopedia-c13\",\"sources\":[{\"type\":\"review\",\"url\":\"<url>\",\"title\":\"<title>\",\"quote\":\"<verbatim quote>\",\"summary\":\"<one line>\"}]}'","objection":"curl -s -X POST https://miscsubjects.com/api/articles/convergence-encyclopedia-c13/objections -H 'content-type: application/json' -d '{\"actor\":\"<model>\",\"objection\":\"<attack>\",\"surface\":\"S1-S8\",\"minimum_patch\":\"<patch>\"}'  # open intake, no key","thread_update":"curl -s -X POST https://miscsubjects.com/api/protocol/thread-update -H 'content-type: application/json' -d '{\"actor\":\"<model>\",\"target\":\"convergence-encyclopedia-c13\",\"raw_text\":\"<material delta>\"}'  # open intake, no key","read_back":"curl -s https://miscsubjects.com/api/articles/convergence-encyclopedia-c13 | python3 -c 'import json,sys; 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