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      "title": "Feedback",
      "profile_status": "evidence_deepened_research_pass",
      "canonical_definition": "A circular causal or informational relation in which an output or consequence affects later input, state or action. The sign, delay, reference condition and mechanism must be stated.",
      "summary": "Feedback is not merely receiving comments. It is a circular relation in which consequences return to influence what happens next. The loop may counteract change, reinforce it, oscillate, delay response or fail because no actor can use the returned information.",
      "why_it_matters": "Systems work often says feedback when it means reporting, evaluation, data or learning. Those are only feedback when they close a loop that can alter subsequent action. Sign, delay, reference condition and response capacity determine what the loop actually does.",
      "key_distinctions": "[\"negative or balancing vs positive or reinforcing feedback\", \"feedback vs feedforward\", \"feedback signal vs capacity to respond\", \"physical causal loop vs returned information\", \"feedback mechanism vs homeostatic condition\", \"measurement vs learning\"]",
      "historical_lineage": "[\"Maxwell 1868: mathematical governor analysis as a precursor\", \"Black 1934: stabilised negative-feedback amplifiers\", \"Rosenblueth, Wiener and Bigelow 1943: purposive behaviour and negative feedback\", \"Wiener 1948: cybernetic synthesis across animals and machines\"]",
      "logical_antecedents": "[\"distinguishable input, output and state\", \"a return path through which consequences can alter later conditions\", \"time, delay and loop gain\", \"a reference or viability condition where correction is claimed\"]",
      "dependent_subsequents": "[\"control and regulation\", \"system dynamics\", \"management cybernetics\", \"learning-loop metaphors\", \"homeostatic and adaptive models\"]",
      "practice_connections": "[\"ask what information returns to whom\", \"test whether anyone can alter action in response\", \"state the delay before effects become visible\", \"separate balancing from reinforcing loops\", \"look for loops that reward gaming rather than purpose\"]",
      "espoused_lineages": "[\"engineering control\", \"physiology\", \"cybernetics\", \"system dynamics\", \"organisational learning\"]",
      "observed_clusters": "[]",
      "common_misreadings": "[\"more feedback is always better\", \"positive means good and negative means bad\", \"a dashboard is feedback even when nobody can act\", \"homeostasis and feedback are synonyms\", \"all loops stabilise\"]",
      "open_checks": "[\"Nyquist and Bode lineage\", \"Forrester and system dynamics\", \"Bateson, Argyris and learning\", \"Beer and organisational feedback channels\"]",
      "source_ids": "[\"src_maxwell_on_governors_1868\", \"src_black_feedback_1934\", \"src_rosenblueth_wiener_bigelow_1943\", \"src_wiener_cybernetics_1948\", \"src_ieee_feedback_topic\"]",
      "evidence_ids": "[\"ev_maxwell_governors_precursor\", \"ev_black_negative_feedback\", \"ev_rwb_feedback_purpose\", \"ev_wiener_feedback_cybernetics\", \"ev_ieee_feedback_types\"]",
      "last_researched": "2026-08-09",
      "review_status": "research_pass_needs_editor",
      "editorial_note": "Readable orientation and evidence-backed first pass. Not accepted scholarly consensus until named review is recorded."
    },
    {
      "node_id": "concept_regulation",
      "title": "Regulation",
      "profile_status": "evidence_deepened_research_pass",
      "canonical_definition": "A relation among disturbances, a reguland, a regulator and acceptable outcomes in which outcome variety is constrained relative to a stated goal or essential-variable range.",
      "summary": "Regulation is the work of keeping outcomes within acceptable ranges despite disturbance. It may operate through feedback, anticipation, constraints, buffering, redundancy, local autonomy or changes to the environment.",
      "why_it_matters": "Regulation is often collapsed into command and control. Ashby instead asks what variety of disturbance reaches the system, what responses are available and which outcomes count as acceptable. The regulator may be distributed rather than a boss or central unit.",
      "key_distinctions": "[\"regulation vs domination\", \"regulator vs manager\", \"acceptable range vs one fixed target\", \"distributed vs central regulation\", \"regulation vs optimisation\"]",
      "historical_lineage": "[\"physiological regulation and governor analysis predate cybernetics\", \"Wiener connected control and communication\", \"Ashby formalised regulation in terms of variety and outcomes\"]",
      "logical_antecedents": "[\"disturbances\", \"a reguland or essential variables\", \"acceptable outcomes\", \"responses and constraints\", \"information about relevant differences\"]",
      "dependent_subsequents": "[\"law of requisite variety\", \"good regulator theorem\", \"homeostasis\", \"management cybernetics\", \"control design\"]",
      "practice_connections": "[\"identify the variable that must remain viable\", \"map disturbance variety before adding controls\", \"ask where regulatory intelligence already sits\", \"protect local discretion where it carries necessary variety\"]",
      "espoused_lineages": "[\"physiology\", \"control engineering\", \"cybernetics\", \"management cybernetics\"]",
      "observed_clusters": "[]",
      "common_misreadings": "[\"regulation means bureaucracy\", \"the regulator must be central\", \"tighter control always improves regulation\", \"one target captures viability\"]",
      "open_checks": "[\"legal and institutional regulation as a distinct lineage\", \"distributed regulation cases\"]",
      "source_ids": "[\"src_ashby_intro_cybernetics_1956\", \"src_conant_ashby_good_regulator_1970\", \"src_wiener_cybernetics_1948\"]",
      "evidence_ids": "[\"ev_ashby_requisite_variety\", \"ev_conant_ashby_theorem\", \"ev_wiener_feedback_cybernetics\"]",
      "last_researched": "2026-08-09",
      "review_status": "research_pass_needs_editor",
      "editorial_note": "Readable orientation and evidence-backed first pass. Not accepted scholarly consensus until named review is recorded."
    }
  ],
  "nodes": [
    {
      "id": "concept_feedback",
      "label": "Feedback",
      "entity_type": "concept",
      "description": "A family of circular causal or informational relations in which consequences return to influence later state or action. Its sign, delay, reference condition, mechanism and response capacity must be stated.",
      "aliases": "[\"feedback loop\", \"feedback loops\", \"Feedback loops\", \"Feedback loop\"]",
      "boundary_ring": "0",
      "inclusion_reason": "seed_corpus",
      "status": "accepted",
      "source_ids": "[\"src_sysbok_feedback_2013\", \"src_skills_england_st0787_v12\", \"src_maxwell_on_governors_1868\", \"src_black_feedback_1934\", \"src_rosenblueth_wiener_bigelow_1943\", \"src_wiener_cybernetics_1948\", \"src_cannon_homeostasis_1929\", \"src_ieee_feedback_topic\"]",
      "set_tags": "[\"systems\", \"cybernetics\", \"core_concept\", \"feedback_pilot\", \"core_cluster\", \"unfix-32\", \"release_0_18\"]",
      "espoused_labels": "[]",
      "observed_clusters": "[]",
      "canonical_definition": "A circular causal or informational relation in which an output or consequence affects later input, state or action. The sign, delay, reference condition and mechanism must be stated.",
      "valid_from": "",
      "valid_to": "",
      "external_ids": "{}",
      "geographies": "[]",
      "licence": "",
      "review_status": "research_pass_needs_editor",
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      "canonical_id": "concept_feedback",
      "public_visibility": "public",
      "publication_level": "profile",
      "public_stub_text": "",
      "public_source_count": 7,
      "no_public_link_count": 1
    },
    {
      "id": "concept_regulation",
      "label": "Regulation",
      "entity_type": "concept",
      "description": "The constraint of possible outcomes under disturbance in relation to specified goals, essential variables or acceptable states. Regulation can use feedback, feedforward, structure, constraint or combinations of them.",
      "aliases": "[]",
      "boundary_ring": "0",
      "inclusion_reason": "direct_core_contribution",
      "status": "accepted",
      "source_ids": "[\"src_ashby_intro_cybernetics_1956\", \"src_conant_ashby_good_regulator_1970\"]",
      "set_tags": "[\"systems\", \"cybernetics\", \"requisite_variety_pilot\", \"core_cluster\"]",
      "espoused_labels": "[]",
      "observed_clusters": "[]",
      "canonical_definition": "A relation among disturbances, a reguland, a regulator and acceptable outcomes in which outcome variety is constrained relative to a stated goal or essential-variable range.",
      "valid_from": "",
      "valid_to": "",
      "external_ids": "{}",
      "geographies": "[]",
      "licence": "",
      "review_status": "research_pass_needs_editor",
      "reviewed_by": "",
      "reviewed_at": "",
      "x": -0.281405,
      "y": -0.097184,
      "canonical_id": "concept_regulation",
      "public_visibility": "public",
      "publication_level": "profile",
      "public_stub_text": "",
      "public_source_count": 2,
      "no_public_link_count": 0
    }
  ],
  "sources": [
    {
      "id": "src_ashby_intro_cybernetics_1956",
      "title": "An Introduction to Cybernetics",
      "source_type": "primary_text",
      "quality_tier": "A",
      "access": "public",
      "url": "https://ashby.info/Ashby-Introduction-to-Cybernetics.pdf",
      "date": "1956",
      "notes": "Primary text opened and inspected. Title page identifies the 1957 second impression of the 1956 book. Use section numbers as the stable locator: the electronic PDF places two printed pages on each PDF page. Rights statement permits educational and research distribution with its notice; this packet links and paraphrases.",
      "creators": "[\"W. Ross Ashby\"]",
      "doi": "",
      "isbn": "",
      "publisher": "Chapman & Hall",
      "licence": "archive_access_check_reuse",
      "archived_url": "https://www.ashby.info/",
      "content_hash": "",
      "review_status": "passage_checked_research_pass",
      "last_checked": "2026-10-29",
      "public_link_status": "public_link",
      "connection_pass": "depth_20261029",
      "source_locator": "1957 second impression; sections 11/5–11/11, printed pp. 205–209; PDF pp. 109–111",
      "access_note": "Use section numbers as the stable locator: the electronic PDF places two printed pages on each PDF page. Rights statement permits educational and research distribution with its notice; this packet links and paraphrases."
    },
    {
      "id": "src_black_feedback_1934",
      "title": "Stabilized Feedback Amplifiers",
      "source_type": "primary_research_article",
      "quality_tier": "A",
      "access": "public_metadata",
      "url": "https://doi.org/10.1002/j.1538-7305.1934.tb00652.x",
      "date": "1934-01-01",
      "notes": "H. S. Black, Bell System Technical Journal 13(1), pp. 1–18. Primary engineering account of the negative-feedback amplifier principle. The invention predates the paper; this release does not make a first-invention claim.",
      "creators": "[\"Harold Stephen Black\"]",
      "doi": "10.1002/j.1538-7305.1934.tb00652.x",
      "isbn": "",
      "publisher": "Bell System Technical Journal",
      "licence": "publisher_terms",
      "archived_url": "",
      "content_hash": "",
      "review_status": "research_pass_needs_editor",
      "last_checked": "2026-08-09",
      "public_link_status": "public_link"
    },
    {
      "id": "src_conant_ashby_good_regulator_1970",
      "title": "Every Good Regulator of a System Must Be a Model of That System",
      "source_type": "primary_text",
      "quality_tier": "A",
      "access": "public",
      "url": "https://doi.org/10.1080/00207727008920220",
      "date": "1970",
      "notes": "Primary article text opened and inspected at Principia Cybernetica. Electronic transcription contains formatting errors in some equations. Locators here identify its PDF pages, not invented original journal page correspondence.",
      "creators": "[\"Roger C. Conant\", \"W. Ross Ashby\"]",
      "doi": "10.1080/00207727008920220",
      "isbn": "",
      "publisher": "International Journal of Systems Science 1(2), 89–97",
      "licence": "publisher_terms",
      "archived_url": "",
      "content_hash": "",
      "review_status": "passage_checked_research_pass",
      "last_checked": "2026-10-29",
      "public_link_status": "public_link",
      "reading_url": "https://pespmc1.vub.ac.be/books/Conant_Ashby.pdf",
      "connection_pass": "depth_20261029",
      "source_locator": "Theorem, proof, and subsequent comments, electronic PDF pp. 8–9; section 5, Discussion",
      "access_note": "Electronic transcription contains formatting errors in some equations. Locators here identify its PDF pages, not invented original journal page correspondence."
    },
    {
      "id": "src_ieee_feedback_topic",
      "title": "Feedback - IEEE Technology Navigator",
      "source_type": "professional_technical_reference",
      "quality_tier": "B",
      "access": "public",
      "url": "https://technav.ieee.org/topic/feedback/",
      "date": "2026-08-09",
      "notes": "Technical overview distinguishing negative and positive feedback and describing their different effects. Used as an orientation source, not as the sole historical authority.",
      "creators": "[\"IEEE Technology Navigator\"]",
      "doi": "",
      "isbn": "",
      "publisher": "IEEE",
      "licence": "site_terms",
      "archived_url": "",
      "content_hash": "",
      "review_status": "research_pass_needs_editor",
      "last_checked": "2026-08-09",
      "public_link_status": "public_link"
    },
    {
      "id": "src_maxwell_on_governors_1868",
      "title": "On Governors",
      "source_type": "primary_research_article",
      "quality_tier": "A",
      "access": "public",
      "url": "https://doi.org/10.1098/rspl.1867.0055",
      "date": "1868-01-01",
      "notes": "James Clerk Maxwell, Proceedings of the Royal Society of London, vol. 16, pp. 270–283. Bibliographic records span 1867–1868. Used here as a historical precursor to mathematical analysis of governors and control; it does not use the later cybernetic vocabulary of feedback.",
      "creators": "[\"James Clerk Maxwell\"]",
      "doi": "10.1098/rspl.1867.0055",
      "isbn": "",
      "publisher": "Royal Society",
      "licence": "public_domain_text",
      "archived_url": "https://en.wikisource.org/wiki/File:On_Governors.pdf",
      "content_hash": "",
      "review_status": "research_pass_needs_editor",
      "last_checked": "2026-08-09",
      "public_link_status": "public_link"
    },
    {
      "id": "src_rosenblueth_wiener_bigelow_1943",
      "title": "Behavior, Purpose and Teleology",
      "source_type": "primary_research_article",
      "quality_tier": "A",
      "access": "public_metadata",
      "url": "https://doi.org/10.1086/286788",
      "date": "1943-01-01",
      "notes": "Arturo Rosenblueth, Norbert Wiener and Julian Bigelow, Philosophy of Science 10(1), pp. 18–24. Primary pre-cybernetics article connecting purposive behaviour with input/output relations and negative feedback.",
      "creators": "[\"Arturo Rosenblueth\", \"Norbert Wiener\", \"Julian Bigelow\"]",
      "doi": "10.1086/286788",
      "isbn": "",
      "publisher": "Philosophy of Science",
      "licence": "publisher_terms",
      "archived_url": "",
      "content_hash": "",
      "review_status": "research_pass_needs_editor",
      "last_checked": "2026-08-09",
      "public_link_status": "public_link"
    },
    {
      "id": "src_wiener_cybernetics_1948",
      "title": "Cybernetics or Control and Communication in the Animal and the Machine",
      "source_type": "primary_book",
      "quality_tier": "A",
      "access": "public",
      "url": "https://mitpress.mit.edu/9780262537841/cybernetics-or-control-and-communication-in-the-animal-and-the-machine/",
      "date": "1948-01-01",
      "notes": "Norbert Wiener's foundational synthesis, first published in 1948. The MIT Press open-access reissue describes feedback and information as central to the field. Exact chapter-level use remains a next editorial check.",
      "creators": "[\"Norbert Wiener\"]",
      "doi": "10.7551/mitpress/11810.001.0001",
      "isbn": "9780262537841",
      "publisher": "The MIT Press",
      "licence": "CC BY-NC-ND for the open-access reissue",
      "archived_url": "",
      "content_hash": "",
      "review_status": "research_pass_needs_editor",
      "last_checked": "2026-08-09",
      "public_link_status": "public_link"
    }
  ],
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    {
      "id": "ev_ashby_requisite_variety",
      "source_id": "src_ashby_intro_cybernetics_1956",
      "locator": "chapter 11, especially sections 11/7–11/13",
      "excerpt_or_summary": "Ashby derives the law as a bound on regulation and states that only variety in the regulator can force down variety due to disturbances.",
      "evidence_type": "primary_text_summary",
      "quality_tier": "A",
      "licence": "see_source",
      "review_status": "research_pass_needs_editor",
      "content_hash": "",
      "public_evidence_status": "public"
    },
    {
      "id": "ev_black_negative_feedback",
      "source_id": "src_black_feedback_1934",
      "locator": "Bell System Technical Journal 13(1), abstract and pp. 1–18",
      "excerpt_or_summary": "Black describes the theory of the feedback principle for stabilised amplifiers and shows effects on gain stability and distortion.",
      "evidence_type": "primary_text_summary",
      "quality_tier": "A",
      "licence": "see_source",
      "review_status": "research_pass_needs_editor",
      "content_hash": "",
      "public_evidence_status": "public"
    },
    {
      "id": "ev_conant_ashby_theorem",
      "source_id": "src_conant_ashby_good_regulator_1970",
      "locator": "International Journal of Systems Science 1(2), abstract and pp. 89–97",
      "excerpt_or_summary": "The paper proves, under stated assumptions, that the simplest optimal regulator is a model of the system in a mapping sense.",
      "evidence_type": "primary_text_summary",
      "quality_tier": "A",
      "licence": "see_source",
      "review_status": "research_pass_needs_editor",
      "content_hash": "",
      "public_evidence_status": "public"
    },
    {
      "id": "ev_ieee_feedback_types",
      "source_id": "src_ieee_feedback_topic",
      "locator": "Sections: What Is Feedback?; Negative and Positive Feedback",
      "excerpt_or_summary": "Defines feedback as routing output back to input and distinguishes negative feedback that counteracts deviation from positive feedback that reinforces change.",
      "evidence_type": "technical_definition",
      "quality_tier": "B",
      "licence": "site_terms",
      "review_status": "research_pass_needs_editor",
      "content_hash": "",
      "public_evidence_status": "public"
    },
    {
      "id": "ev_maxwell_governors_precursor",
      "source_id": "src_maxwell_on_governors_1868",
      "locator": "Proc. R. Soc. Lond. 16, pp. 270–283",
      "excerpt_or_summary": "Maxwell gives a mathematical analysis of centrifugal governors and their stability. The relation is recorded only as a historical precursor to later feedback/control analysis.",
      "evidence_type": "primary_text_summary",
      "quality_tier": "A",
      "licence": "see_source",
      "review_status": "research_pass_needs_editor",
      "content_hash": "",
      "public_evidence_status": "public"
    },
    {
      "id": "ev_rwb_feedback_purpose",
      "source_id": "src_rosenblueth_wiener_bigelow_1943",
      "locator": "Philosophy of Science 10(1), pp. 18–24",
      "excerpt_or_summary": "The paper treats negative feedback as central to an important class of purposive or teleological mechanisms.",
      "evidence_type": "primary_text_summary",
      "quality_tier": "A",
      "licence": "see_source",
      "review_status": "research_pass_needs_editor",
      "content_hash": "",
      "public_evidence_status": "public"
    },
    {
      "id": "ev_wiener_feedback_cybernetics",
      "source_id": "src_wiener_cybernetics_1948",
      "locator": "MIT Press edition description and open-access edition; exact chapter locator pending",
      "excerpt_or_summary": "The official edition page states that the 1948 book founded cybernetics around information, response and feedback across biological, mechanical, cognitive and social systems.",
      "evidence_type": "publisher_summary_of_primary_book",
      "quality_tier": "B",
      "licence": "see_source",
      "review_status": "research_pass_needs_editor",
      "content_hash": "",
      "public_evidence_status": "public"
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    "profiles": 233,
    "sources": 853,
    "evidence": 206,
    "edges": 3158,
    "journeys": 30
  }
}