{"id":"gof-type-is-interface-class-is-implementation","text":"An object's type refers to its interface (set of operation signatures), while its class defines its implementation; objects of different classes can share a type.","truth_value":"IN","source":"entries/2026/06/17/gof-oo-chunk-2.md","source_url":"","source_hash":"","justifications":[],"dependents":["pattern-roles-and-type-interface-separation-ground-abstract-coupling"],"metadata":{"last_premise_reviewed":"2026-06-17T18:19:22","premise_review_result":"pass"},"created_at":"2026-06-17T21:30:27+00:00","updated_at":"2026-06-17T21:30:27+00:00","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"gof-type-is-interface-class-is-implementation","truth_value":"IN","reason":"premise"}]}}