{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:CVODPFILDIMOJAQJKGQT3JXKR5","short_pith_number":"pith:CVODPFIL","canonical_record":{"source":{"id":"1302.1143","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2013-02-05T18:14:02Z","cross_cats_sorted":["q-bio.PE"],"title_canon_sha256":"aac5bbe0cab621051b9fac1e14a1438eb0a06353bc27a4ad6d901dace70b89cc","abstract_canon_sha256":"07cbdbc5ea49b412a0c9bc2047625c30fd824cb19aad52802d18cc30be60c819"},"schema_version":"1.0"},"canonical_sha256":"155c37950b1a18e4820951a13da6ea8f4361c0858659714e00b99ea45d011e45","source":{"kind":"arxiv","id":"1302.1143","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.1143","created_at":"2026-05-18T01:51:50Z"},{"alias_kind":"arxiv_version","alias_value":"1302.1143v1","created_at":"2026-05-18T01:51:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.1143","created_at":"2026-05-18T01:51:50Z"},{"alias_kind":"pith_short_12","alias_value":"CVODPFILDIMO","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CVODPFILDIMOJAQJ","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CVODPFIL","created_at":"2026-05-18T12:27:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:CVODPFILDIMOJAQJKGQT3JXKR5","target":"record","payload":{"canonical_record":{"source":{"id":"1302.1143","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2013-02-05T18:14:02Z","cross_cats_sorted":["q-bio.PE"],"title_canon_sha256":"aac5bbe0cab621051b9fac1e14a1438eb0a06353bc27a4ad6d901dace70b89cc","abstract_canon_sha256":"07cbdbc5ea49b412a0c9bc2047625c30fd824cb19aad52802d18cc30be60c819"},"schema_version":"1.0"},"canonical_sha256":"155c37950b1a18e4820951a13da6ea8f4361c0858659714e00b99ea45d011e45","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:51:50.171812Z","signature_b64":"ljcQT94j0GOpxmrmJ3a291AtBKNElTIQps7yrJtNb+CvTee+WSr3r58nt+RlJzDbVens6/2VZCmoNBE/WFTjBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"155c37950b1a18e4820951a13da6ea8f4361c0858659714e00b99ea45d011e45","last_reissued_at":"2026-05-18T01:51:50.171310Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:51:50.171310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1302.1143","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":"2026-05-18T01:51:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pqRchrm0plRW8jdTdH/xban/OgpHLXdG2XUIIKqqvuC3hAetQc13gvWm8y4ZkNLuCDWDH8Wj3d3HZ30c2iK2Aw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T09:59:27.056590Z"},"content_sha256":"a6d50655295e30d883ccaa873bfeabf4cd46c45925438a8011daeff0808549df","schema_version":"1.0","event_id":"sha256:a6d50655295e30d883ccaa873bfeabf4cd46c45925438a8011daeff0808549df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:CVODPFILDIMOJAQJKGQT3JXKR5","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Evolvability Is Inevitable: Increasing Evolvability Without the Pressure to Adapt","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["q-bio.PE"],"primary_cat":"cs.NE","authors_text":"Joel Lehman, Kenneth O. Stanley","submitted_at":"2013-02-05T18:14:02Z","abstract_excerpt":"Why evolvability appears to have increased over evolutionary time is an important unresolved biological question. Unlike most candidate explanations, this paper proposes that increasing evolvability can result without any pressure to adapt. The insight is that if evolvability is heritable, then an unbiased drifting process across genotypes can still create a distribution of phenotypes biased towards evolvability, because evolvable organisms diffuse more quickly through the space of possible phenotypes. Furthermore, because phenotypic divergence often correlates with founding niches, niche foun"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.1143","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":"2026-05-18T01:51:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"prUz3dHPFx9RoGFQeVOeq7cUrHzfiqa/1DGcHVwiTtENAAUtoa7havWTssJu4UA6XvmVYbXdgVIyEad5GcDBDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-02T09:59:27.056936Z"},"content_sha256":"09675acbb574a441ecbc215c0e93ce3228dfe45d1fdbe46706bbf929710b2616","schema_version":"1.0","event_id":"sha256:09675acbb574a441ecbc215c0e93ce3228dfe45d1fdbe46706bbf929710b2616"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/CVODPFILDIMOJAQJKGQT3JXKR5/bundle.json","state_url":"https://pith.science/pith/CVODPFILDIMOJAQJKGQT3JXKR5/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/CVODPFILDIMOJAQJKGQT3JXKR5/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":"2026-07-02T09:59:27Z","links":{"resolver":"https://pith.science/pith/CVODPFILDIMOJAQJKGQT3JXKR5","bundle":"https://pith.science/pith/CVODPFILDIMOJAQJKGQT3JXKR5/bundle.json","state":"https://pith.science/pith/CVODPFILDIMOJAQJKGQT3JXKR5/state.json","well_known_bundle":"https://pith.science/.well-known/pith/CVODPFILDIMOJAQJKGQT3JXKR5/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:CVODPFILDIMOJAQJKGQT3JXKR5","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":"07cbdbc5ea49b412a0c9bc2047625c30fd824cb19aad52802d18cc30be60c819","cross_cats_sorted":["q-bio.PE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2013-02-05T18:14:02Z","title_canon_sha256":"aac5bbe0cab621051b9fac1e14a1438eb0a06353bc27a4ad6d901dace70b89cc"},"schema_version":"1.0","source":{"id":"1302.1143","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1302.1143","created_at":"2026-05-18T01:51:50Z"},{"alias_kind":"arxiv_version","alias_value":"1302.1143v1","created_at":"2026-05-18T01:51:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1302.1143","created_at":"2026-05-18T01:51:50Z"},{"alias_kind":"pith_short_12","alias_value":"CVODPFILDIMO","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_16","alias_value":"CVODPFILDIMOJAQJ","created_at":"2026-05-18T12:27:40Z"},{"alias_kind":"pith_short_8","alias_value":"CVODPFIL","created_at":"2026-05-18T12:27:40Z"}],"graph_snapshots":[{"event_id":"sha256:09675acbb574a441ecbc215c0e93ce3228dfe45d1fdbe46706bbf929710b2616","target":"graph","created_at":"2026-05-18T01:51:50Z","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":"Why evolvability appears to have increased over evolutionary time is an important unresolved biological question. Unlike most candidate explanations, this paper proposes that increasing evolvability can result without any pressure to adapt. The insight is that if evolvability is heritable, then an unbiased drifting process across genotypes can still create a distribution of phenotypes biased towards evolvability, because evolvable organisms diffuse more quickly through the space of possible phenotypes. Furthermore, because phenotypic divergence often correlates with founding niches, niche foun","authors_text":"Joel Lehman, Kenneth O. Stanley","cross_cats":["q-bio.PE"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2013-02-05T18:14:02Z","title":"Evolvability Is Inevitable: Increasing Evolvability Without the Pressure to Adapt"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1302.1143","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:a6d50655295e30d883ccaa873bfeabf4cd46c45925438a8011daeff0808549df","target":"record","created_at":"2026-05-18T01:51:50Z","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":"07cbdbc5ea49b412a0c9bc2047625c30fd824cb19aad52802d18cc30be60c819","cross_cats_sorted":["q-bio.PE"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.NE","submitted_at":"2013-02-05T18:14:02Z","title_canon_sha256":"aac5bbe0cab621051b9fac1e14a1438eb0a06353bc27a4ad6d901dace70b89cc"},"schema_version":"1.0","source":{"id":"1302.1143","kind":"arxiv","version":1}},"canonical_sha256":"155c37950b1a18e4820951a13da6ea8f4361c0858659714e00b99ea45d011e45","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"155c37950b1a18e4820951a13da6ea8f4361c0858659714e00b99ea45d011e45","first_computed_at":"2026-05-18T01:51:50.171310Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:51:50.171310Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ljcQT94j0GOpxmrmJ3a291AtBKNElTIQps7yrJtNb+CvTee+WSr3r58nt+RlJzDbVens6/2VZCmoNBE/WFTjBg==","signature_status":"signed_v1","signed_at":"2026-05-18T01:51:50.171812Z","signed_message":"canonical_sha256_bytes"},"source_id":"1302.1143","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a6d50655295e30d883ccaa873bfeabf4cd46c45925438a8011daeff0808549df","sha256:09675acbb574a441ecbc215c0e93ce3228dfe45d1fdbe46706bbf929710b2616"],"state_sha256":"c49810a5c99ff7dd30e451897a737fe0e5b01ef197b0d9b3c7b88ccd7e4e2501"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EG60/97bxEwYC/2u01LtNiK4OY4+eqiCzqMc72HCCgyzyv6/l2nTNjWsb+eQwBv35Kil53t+K5HJYRhIaLQICg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-02T09:59:27.058928Z","bundle_sha256":"cff3af6ca00988537d77df892400e0830007d3403c697438aaecb47c6bcad72e"}}