{"id":"gof-state-subclasses-often-singletons","text":"TCPState subclasses in the State pattern example maintain no local state, so they can be shared — each is a Singleton with a static Instance() operation.","truth_value":"IN","source":"entries/2026/06/17/gof-oo-chunk-20.md","source_url":"","source_hash":"","justifications":[],"dependents":["controlled-sharing-meta-pattern","singleton-as-cross-category-enabling-infrastructure","singleton-cross-category-sharing-infrastructure","singleton-pervasive-instance-governance-across-categories"],"metadata":{"last_premise_reviewed":"2026-06-17T18:19:22","premise_review_result":"pass"},"created_at":"2026-06-17T17:04:08+00:00","updated_at":"2026-06-17T17:04:08+00:00","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"gof-state-subclasses-often-singletons","truth_value":"IN","reason":"premise"}]}}