{"id":"data-flow-tension-isomorphic-across-notification-and-delegation","text":"Observer's push-vs-pull notification models and Strategy's two data-passing approaches instantiate an isomorphic design tension: eagerly providing all data (simpler protocol but couples the receiver to unused information) versus letting the receiver pull what it needs (more flexible but requires a back-reference to the data source).","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["gof-observer-push-vs-pull-models","gof-strategy-data-passing-two-approaches"],"outlist":[],"label":"Both patterns independently discover the same push-vs-pull data flow tradeoff"}],"dependents":[],"metadata":{"source_type":"derived","review_result":"pass"},"created_at":"2026-06-18T04:45:05+00:00","updated_at":"2026-06-18T06:15:08+00:00","reviewed_at":"2026-06-18T06:15:08+00:00","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"data-flow-tension-isomorphic-across-notification-and-delegation","truth_value":"IN","reason":"SL justification valid","antecedents":["gof-observer-push-vs-pull-models","gof-strategy-data-passing-two-approaches"],"label":"Both patterns independently discover the same push-vs-pull data flow tradeoff"},{"node":"gof-observer-push-vs-pull-models","truth_value":"IN","reason":"premise"},{"node":"gof-strategy-data-passing-two-approaches","truth_value":"IN","reason":"premise"}]}}