{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:7MJ26HBNICLNZIH6EDSJLLQ5LQ","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":"9497cb6e78ed1f41ddbd52e696f1d5ee122d8512a197bb881f828732a573ec83","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LO","submitted_at":"2026-04-28T11:04:26Z","title_canon_sha256":"72f6dbf69c1cd8bf08098c46dd0f49894fbce2721df33cd5f7708fbf156b5970"},"schema_version":"1.0","source":{"id":"2604.26977","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2604.26977","created_at":"2026-06-02T03:04:41Z"},{"alias_kind":"arxiv_version","alias_value":"2604.26977v2","created_at":"2026-06-02T03:04:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2604.26977","created_at":"2026-06-02T03:04:41Z"},{"alias_kind":"pith_short_12","alias_value":"7MJ26HBNICLN","created_at":"2026-06-02T03:04:41Z"},{"alias_kind":"pith_short_16","alias_value":"7MJ26HBNICLNZIH6","created_at":"2026-06-02T03:04:41Z"},{"alias_kind":"pith_short_8","alias_value":"7MJ26HBN","created_at":"2026-06-02T03:04:41Z"}],"graph_snapshots":[{"event_id":"sha256:c564b310e896a2d88ac641e0b6e13e0a1d1655ecf8dc9e3bc522e2dbecb3b27f","target":"graph","created_at":"2026-06-02T03:04:41Z","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":4,"items":[{"attestation":"unclaimed","claim_id":"C1","kind":"strongest_claim","source":"verdict.strongest_claim","status":"machine_extracted","text":"The account is bi-preferential: two orderings--ideality and normality--on worlds are employed to address shortcomings in earlier approaches, with a separate ranking method for each."},{"attestation":"unclaimed","claim_id":"C2","kind":"weakest_assumption","source":"verdict.weakest_assumption","status":"machine_extracted","text":"That the incorporation of a nonmonotonic reasoning mechanism via the two separate orderings (ideality and normality) with their respective ranking methods correctly enables withdrawal of obligations upon new conflicting information without introducing inconsistencies."},{"attestation":"unclaimed","claim_id":"C3","kind":"one_line_summary","source":"verdict.one_line_summary","status":"machine_extracted","text":"A bi-preferential semantics with ideality and normality orderings models defeasible conditional obligations and connects to constrained input/output logic."},{"attestation":"unclaimed","claim_id":"C4","kind":"headline","source":"verdict.pith_extraction.headline","status":"machine_extracted","text":"A two-tiered preference semantics with separate ideality and normality orderings models defeasible conditional obligations that withdraw with new conflicting information."}],"snapshot_sha256":"6cd51301c024adf48a9508470cdc6cf1de8cc507547a7e233241929a987f954e"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[{"findings_count":0,"name":"ai_meta_artifact","ran_at":"2026-05-21T04:39:27.271911Z","status":"completed","version":"1.0.0"},{"findings_count":0,"name":"doi_compliance","ran_at":"2026-05-19T21:06:04.321438Z","status":"completed","version":"1.0.0"}],"endpoint":"/pith/2604.26977/integrity.json","findings":[],"snapshot_sha256":"f6f1ddc18aeaf11b74737271012fe702c4a4699dae809290dafba751086d5c40","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In response to a concern raised by Horty, this paper develops a two-tiered, preference-based semantic framework for modeling defeasible conditional obligations. The paper extends a Hansson-Lewis style preference semantics for dyadic deontic logic by incorporating a nonmonotonic reasoning mechanism that enables previously derived obligations to be withdrawn when new, potentially conflicting information comes in. The account is bi-preferential: two orderings--ideality and normality--on worlds are employed to address shortcomings in earlier approaches, with a separate ranking method for each. At ","authors_text":"Xavier Parent","cross_cats":["cs.AI"],"headline":"A two-tiered preference semantics with separate ideality and normality orderings models defeasible conditional obligations that withdraw with new conflicting information.","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LO","submitted_at":"2026-04-28T11:04:26Z","title":"Defeasible Conditional Obligation in a Two-tiered Preference-based Semantics (Extended Version)"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2604.26977","kind":"arxiv","version":2},"verdict":{"created_at":"2026-05-07T14:34:25.164541Z","id":"27c99d97-6c10-40bb-814a-abef20095520","model_set":{"reader":"grok-4.3"},"one_line_summary":"A bi-preferential semantics with ideality and normality orderings models defeasible conditional obligations and connects to constrained input/output logic.","pipeline_version":"pith-pipeline@v0.9.0","pith_extraction_headline":"A two-tiered preference semantics with separate ideality and normality orderings models defeasible conditional obligations that withdraw with new conflicting information.","strongest_claim":"The account is bi-preferential: two orderings--ideality and normality--on worlds are employed to address shortcomings in earlier approaches, with a separate ranking method for each.","weakest_assumption":"That the incorporation of a nonmonotonic reasoning mechanism via the two separate orderings (ideality and normality) with their respective ranking methods correctly enables withdrawal of obligations upon new conflicting information without introducing inconsistencies."}},"verdict_id":"27c99d97-6c10-40bb-814a-abef20095520"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0fa22afa105d2676c550a31b59ce86a4128575c87b3178319a9e4c53fece429a","target":"record","created_at":"2026-06-02T03:04:41Z","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":"9497cb6e78ed1f41ddbd52e696f1d5ee122d8512a197bb881f828732a573ec83","cross_cats_sorted":["cs.AI"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cs.LO","submitted_at":"2026-04-28T11:04:26Z","title_canon_sha256":"72f6dbf69c1cd8bf08098c46dd0f49894fbce2721df33cd5f7708fbf156b5970"},"schema_version":"1.0","source":{"id":"2604.26977","kind":"arxiv","version":2}},"canonical_sha256":"fb13af1c2d4096dca0fe20e495ae1d5c3acf189e09fac08d7cc9a5c855edc78a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fb13af1c2d4096dca0fe20e495ae1d5c3acf189e09fac08d7cc9a5c855edc78a","first_computed_at":"2026-06-02T03:04:41.629098Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-02T03:04:41.629098Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bdfDbD3KSJKEto30dgG1yJaJB3rxKffgaxNpK2R29/QmXlk7/ogUNDhJn3nmeoRmhoQ76EFciki9S1jOsLGeBg==","signature_status":"signed_v1","signed_at":"2026-06-02T03:04:41.629502Z","signed_message":"canonical_sha256_bytes"},"source_id":"2604.26977","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0fa22afa105d2676c550a31b59ce86a4128575c87b3178319a9e4c53fece429a","sha256:c564b310e896a2d88ac641e0b6e13e0a1d1655ecf8dc9e3bc522e2dbecb3b27f"],"state_sha256":"9676ec1a7f49c28dddb0a531a501afc74dc5ef30d418fa18ea78fd9f19cf7a8c"}