{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:4NNORIP3FE6REHMEJ3ZYPY3LEJ","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":"cf68e72786525c46d7058a756dd3754d50ee2a7f210aa4fa16b7e9cf8232aa78","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"q-bio.NC","submitted_at":"2018-01-08T19:38:59Z","title_canon_sha256":"c2600afe07c036de47095a4b412aa48f4f0581ea769d92d3e9c0c8de9484732a"},"schema_version":"1.0","source":{"id":"1801.02657","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.02657","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"arxiv_version","alias_value":"1801.02657v1","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.02657","created_at":"2026-05-18T00:26:22Z"},{"alias_kind":"pith_short_12","alias_value":"4NNORIP3FE6R","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_16","alias_value":"4NNORIP3FE6REHME","created_at":"2026-05-18T12:32:05Z"},{"alias_kind":"pith_short_8","alias_value":"4NNORIP3","created_at":"2026-05-18T12:32:05Z"}],"graph_snapshots":[{"event_id":"sha256:12b3e489dd1f1da644b98ce864573eeb945276466b0872e7f63166be753dd428","target":"graph","created_at":"2026-05-18T00:26:22Z","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 do not yet understand how the vertebrate visual system provides for recognition of ob- jects. Countless experiments have been performed to examine the contribution of cues such as color, texture, and shadowing, but the most important cues are the con- tours of the outer boundary. Most objects that we can name can be identified as a silhouette, or equally well as a line drawing of the boundary. This has long been ap- preciated, so it is somewhat surprising that after more than a century of experimental research, we have not yet established how our visual system encodes this shape in- formati","authors_text":"Ernest Greene, Onyinye Onwuzulike","cross_cats":[],"headline":"","license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"q-bio.NC","submitted_at":"2018-01-08T19:38:59Z","title":"What constitutes elemental shape information for biological vision?"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.02657","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:da22faab8f39a8e368cafac63115e75c9aa25e831c428213df16581c37406ff5","target":"record","created_at":"2026-05-18T00:26:22Z","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":"cf68e72786525c46d7058a756dd3754d50ee2a7f210aa4fa16b7e9cf8232aa78","cross_cats_sorted":[],"license":"http://creativecommons.org/publicdomain/zero/1.0/","primary_cat":"q-bio.NC","submitted_at":"2018-01-08T19:38:59Z","title_canon_sha256":"c2600afe07c036de47095a4b412aa48f4f0581ea769d92d3e9c0c8de9484732a"},"schema_version":"1.0","source":{"id":"1801.02657","kind":"arxiv","version":1}},"canonical_sha256":"e35ae8a1fb293d121d844ef387e36b225f1cd7278646b7b84195e656994b9446","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e35ae8a1fb293d121d844ef387e36b225f1cd7278646b7b84195e656994b9446","first_computed_at":"2026-05-18T00:26:22.801585Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:22.801585Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Qgzocl1IJXN8qmF0NOuE3AsBemVTeDZrRBYHtDyK6poBC1sstGta0yfymKI3LarRIva0miLTE/T4AURHBkb2CA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:22.802326Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.02657","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:da22faab8f39a8e368cafac63115e75c9aa25e831c428213df16581c37406ff5","sha256:12b3e489dd1f1da644b98ce864573eeb945276466b0872e7f63166be753dd428"],"state_sha256":"e88017a03b239efc541949f4c1a9aa88b58a640ba160414c7b4d069b58f8ff1c"}