{"id":"observer-composition-reliability-bounded","text":"Observer's designed-for-composition architecture — Template Method enforcing pre-notification consistency, ChangeManager bridging to Mediator for complex multi-subject scenarios — achieves reliable multi-pattern integration only while observers' mutual ignorance does not trigger cascading unexpected updates; when multiple observers on overlapping subjects create implicit feedback loops, the composition's reliability degrades despite its architectural safeguards.","truth_value":"OUT","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["observer-consistency-via-template-method","changemanager-mediator-observer-composition"],"outlist":["gof-observer-unexpected-updates-liability"],"label":"Observer's composition architecture provides reliability mechanisms that unexpected cascading updates can defeat"}],"dependents":[],"metadata":{"source_type":"derived"},"created_at":"2026-06-17T23:12:23+00:00","updated_at":"2026-06-17T23:12:23+00:00","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"observer-composition-reliability-bounded","truth_value":"OUT","reason":"SL justification invalid","failed_antecedents":[],"label":"Observer's composition architecture provides reliability mechanisms that unexpected cascading updates can defeat","violated_outlist":["gof-observer-unexpected-updates-liability"]}]}}