{"slug":"hunter-second-sieve","identifier":"hunter-second-sieve","title":"Second Sieve","author":"Maclain Hunter","sourceSha256":"72acc8098548198cf5a8796fee2ecc19ff9c9c8a1211c456b106885e6bc7788a","sourceKind":"authored-foundational-record","recordedAt":"2026-10-02T23:43:56.133Z","recordedAtMeaning":"Database registration time, not a claim of original handwritten authorship.","originalAuthoredAt":null,"formalizedAt":"2026-10-03T10:37:05.082Z","checkedAt":"2026-10-03T10:41:35.908Z","status":"verified","axiomFree":true,"axioms":[],"theoremNames":["HunterAuthored.inference_1"],"units":[{"id":"inference_1","sourceStatement":"{P <-> Q, Q <-> R} |= R -> (Q <-> P)","sourceOffset":226,"scope":"Exact source sequent under finite two-valued propositional semantics. 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