{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:OXENJCMAQME4WSZLSHYJD5KV3P","short_pith_number":"pith:OXENJCMA","canonical_record":{"source":{"id":"1310.4086","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-10-15T15:36:52Z","cross_cats_sorted":[],"title_canon_sha256":"b700122dbd620dfa24aa804b0657c6f76ccbf0a9816d360a025d7fa10a636ab1","abstract_canon_sha256":"b35978f9f803cb9a540ea37953a537b53d15263d72e2b96d7fa2a492f9949c18"},"schema_version":"1.0"},"canonical_sha256":"75c8d489808309cb4b2b91f091f555dbe81c2552a87c2fcc461d32a71622d00e","source":{"kind":"arxiv","id":"1310.4086","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.4086","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"1310.4086v1","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.4086","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"OXENJCMAQME4","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"OXENJCMAQME4WSZL","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"OXENJCMA","created_at":"2026-05-18T12:27:54Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:OXENJCMAQME4WSZLSHYJD5KV3P","target":"record","payload":{"canonical_record":{"source":{"id":"1310.4086","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-10-15T15:36:52Z","cross_cats_sorted":[],"title_canon_sha256":"b700122dbd620dfa24aa804b0657c6f76ccbf0a9816d360a025d7fa10a636ab1","abstract_canon_sha256":"b35978f9f803cb9a540ea37953a537b53d15263d72e2b96d7fa2a492f9949c18"},"schema_version":"1.0"},"canonical_sha256":"75c8d489808309cb4b2b91f091f555dbe81c2552a87c2fcc461d32a71622d00e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:10:25.099496Z","signature_b64":"rJhAi4mQ7Ku91eTO2dB7YF134Zyx7Pd5stfgxhJMu6j9QJa27+RJOSR9V12JZIbT5eZMs7xKNRY16xLMhNm1AA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"75c8d489808309cb4b2b91f091f555dbe81c2552a87c2fcc461d32a71622d00e","last_reissued_at":"2026-05-18T03:10:25.098952Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:10:25.098952Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1310.4086","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z9KNyDeWx2nT9j1arsDJ91FUWAmZkLOATWARSeoah6LLcMFi3XK0cw2OCRwk9o9IMVlP1Z+la4H4/2R4uoJoDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T22:46:40.810084Z"},"content_sha256":"7a57dbeda0e6e806ecddd7b93f02a51de4ce900b7d43e4801e594a2d62b0a3bf","schema_version":"1.0","event_id":"sha256:7a57dbeda0e6e806ecddd7b93f02a51de4ce900b7d43e4801e594a2d62b0a3bf"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:OXENJCMAQME4WSZLSHYJD5KV3P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Computational Model of Two Cognitive Transitions Underlying Cultural Evolution","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.AI","authors_text":"Hadi Firouzi, Liane Gabora, Wei Wen Chia","submitted_at":"2013-10-15T15:36:52Z","abstract_excerpt":"We tested the computational feasibility of the proposal that open-ended cultural evolution was made possible by two cognitive transitions: (1) onset of the capacity to chain thoughts together, followed by (2) onset of contextual focus (CF): the capacity to shift between a divergent mode of thought conducive to 'breaking out of a rut' and a convergent mode of thought conducive to minor modifications. These transitions were simulated in EVOC, an agent-based model of cultural evolution, in which the fitness of agents' actions increases as agents invent ideas for new actions, and imitate the fitte"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.4086","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:10:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"t4isrFaj4jEwO4GgNaQh0ENmugSefDxZeYchW7xuivxZLMYLfufulo+1V0kQxNVoN3djr3nmUXUB7PqGAIbbDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T22:46:40.810799Z"},"content_sha256":"7d2c706afe6a77d0e52ecedc981c251903d7413e14212f9e85c01367f38d49be","schema_version":"1.0","event_id":"sha256:7d2c706afe6a77d0e52ecedc981c251903d7413e14212f9e85c01367f38d49be"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/OXENJCMAQME4WSZLSHYJD5KV3P/bundle.json","state_url":"https://pith.science/pith/OXENJCMAQME4WSZLSHYJD5KV3P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/OXENJCMAQME4WSZLSHYJD5KV3P/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-09T22:46:40Z","links":{"resolver":"https://pith.science/pith/OXENJCMAQME4WSZLSHYJD5KV3P","bundle":"https://pith.science/pith/OXENJCMAQME4WSZLSHYJD5KV3P/bundle.json","state":"https://pith.science/pith/OXENJCMAQME4WSZLSHYJD5KV3P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/OXENJCMAQME4WSZLSHYJD5KV3P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:OXENJCMAQME4WSZLSHYJD5KV3P","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"b35978f9f803cb9a540ea37953a537b53d15263d72e2b96d7fa2a492f9949c18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-10-15T15:36:52Z","title_canon_sha256":"b700122dbd620dfa24aa804b0657c6f76ccbf0a9816d360a025d7fa10a636ab1"},"schema_version":"1.0","source":{"id":"1310.4086","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1310.4086","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"arxiv_version","alias_value":"1310.4086v1","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1310.4086","created_at":"2026-05-18T03:10:25Z"},{"alias_kind":"pith_short_12","alias_value":"OXENJCMAQME4","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_16","alias_value":"OXENJCMAQME4WSZL","created_at":"2026-05-18T12:27:54Z"},{"alias_kind":"pith_short_8","alias_value":"OXENJCMA","created_at":"2026-05-18T12:27:54Z"}],"graph_snapshots":[{"event_id":"sha256:7d2c706afe6a77d0e52ecedc981c251903d7413e14212f9e85c01367f38d49be","target":"graph","created_at":"2026-05-18T03:10:25Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We tested the computational feasibility of the proposal that open-ended cultural evolution was made possible by two cognitive transitions: (1) onset of the capacity to chain thoughts together, followed by (2) onset of contextual focus (CF): the capacity to shift between a divergent mode of thought conducive to 'breaking out of a rut' and a convergent mode of thought conducive to minor modifications. These transitions were simulated in EVOC, an agent-based model of cultural evolution, in which the fitness of agents' actions increases as agents invent ideas for new actions, and imitate the fitte","authors_text":"Hadi Firouzi, Liane Gabora, Wei Wen Chia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-10-15T15:36:52Z","title":"A Computational Model of Two Cognitive Transitions Underlying Cultural Evolution"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1310.4086","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:7a57dbeda0e6e806ecddd7b93f02a51de4ce900b7d43e4801e594a2d62b0a3bf","target":"record","created_at":"2026-05-18T03:10:25Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"b35978f9f803cb9a540ea37953a537b53d15263d72e2b96d7fa2a492f9949c18","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.AI","submitted_at":"2013-10-15T15:36:52Z","title_canon_sha256":"b700122dbd620dfa24aa804b0657c6f76ccbf0a9816d360a025d7fa10a636ab1"},"schema_version":"1.0","source":{"id":"1310.4086","kind":"arxiv","version":1}},"canonical_sha256":"75c8d489808309cb4b2b91f091f555dbe81c2552a87c2fcc461d32a71622d00e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"75c8d489808309cb4b2b91f091f555dbe81c2552a87c2fcc461d32a71622d00e","first_computed_at":"2026-05-18T03:10:25.098952Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:10:25.098952Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rJhAi4mQ7Ku91eTO2dB7YF134Zyx7Pd5stfgxhJMu6j9QJa27+RJOSR9V12JZIbT5eZMs7xKNRY16xLMhNm1AA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:10:25.099496Z","signed_message":"canonical_sha256_bytes"},"source_id":"1310.4086","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7a57dbeda0e6e806ecddd7b93f02a51de4ce900b7d43e4801e594a2d62b0a3bf","sha256:7d2c706afe6a77d0e52ecedc981c251903d7413e14212f9e85c01367f38d49be"],"state_sha256":"589b9b6ce98598547873f6d73b5b84c7236ec593df0ee381c8b029f443aae0b8"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"da6YC1F0Uis8rgdtKKPba4vhqbOu/f1uTYu3DtqLdcpfynW9KPFc3wkc49z8siYf2NW7oxfMRPg+6vAH5ki9BA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T22:46:40.814891Z","bundle_sha256":"a71700417776384408ea963a55676c7519bf408a8733f03fd978c86bb5295050"}}