{"slug":"thinker-w-ross-ashby","verification":{"valid":true,"entries":2,"head":"cfd1d41bd1deeda4e392029f95b3fa5fc5f7293442de796517267c96f3813414"},"count":2,"sources":[{"id":"s1","type":"other","url":"https://ashby.info/Ashby-Introduction-to-Cybernetics.pdf","title":"An Introduction to Cybernetics","quote":"Only variety can destroy variety.","summary":"1956 text by W. Ross Ashby stating the law of requisite variety in chapter 11.","claim_ids":["c1","c2"],"found_by":"grok/grok-4.3","extra":{},"accessed_at":"2026-07-07T07:27:53.565Z","link_status":"ok","quote_status":"unverified","prev":"genesis","hash":"7f8e5c359f0b83d8374e2a0ae834ecdee805f9a67b28e527e31a62debe1eb2f3"},{"id":"s2","type":"other","url":"https://archive.org/details/designforbrain00ashb","title":"Design for a Brain","quote":"The origin of adaptive behaviour through mechanisms that reach equilibrium.","summary":"1960 edition modeling brain-like adaptation via state exploration.","claim_ids":["c3"],"found_by":"grok/grok-4.3","extra":{},"accessed_at":"2026-07-07T07:27:53.565Z","link_status":"ok","quote_status":"unverified","prev":"7f8e5c359f0b83d8374e2a0ae834ecdee805f9a67b28e527e31a62debe1eb2f3","hash":"cfd1d41bd1deeda4e392029f95b3fa5fc5f7293442de796517267c96f3813414"}]}