{"id":"pattern-participants-are-roles-not-classes","text":"GoF pattern participants (e.g., Subject, Observer, Adaptee) are named roles that concrete classes fill, not classes themselves — the index maps every participant to its pattern and page.","truth_value":"IN","source":"entries/2026/06/17/gof-oo-chunk-24.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":"2026-06-17T21:30:28+00:00","updated_at":"2026-06-17T21:30:28+00:00","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"pattern-participants-are-roles-not-classes","truth_value":"IN","reason":"premise"}]}}