{"id":"observer-mediator-distribution-centralization-tradeoff","text":"Observer and Mediator represent a fundamental architectural tradeoff between distributed and centralized communication: Observer distributes via subscription for maximum reusability but risks unexpected update cascades, while Mediator centralizes via a hub for comprehensibility but risks monolithic growth — making the choice between them a decision about which liability is more tolerable.","truth_value":"IN","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["mediator-centralizes-observer-distributes","observers-more-reusable-than-mediators","gof-observer-unexpected-updates-liability","gof-mediator-centralizes-control-tradeoff"],"outlist":[],"label":"Two base beliefs on the relationship + one liability each combine into a unified architectural tradeoff"}],"dependents":["changemanager-fully-resolves-observer-cascade-liability","changemanager-mediator-observer-composition","observer-mediator-complete-communication","observer-mediator-tradeoff-resolved-by-srp-within-restraint-infrastructure","pattern-judgment-inter-and-intra-constraints","srp-grounds-observer-mediator-decision"],"metadata":{"source_type":"derived","review_result":"pass"},"created_at":"2026-06-17T17:55:06+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":"observer-mediator-distribution-centralization-tradeoff","truth_value":"IN","reason":"SL justification valid","antecedents":["mediator-centralizes-observer-distributes","observers-more-reusable-than-mediators","gof-observer-unexpected-updates-liability","gof-mediator-centralizes-control-tradeoff"],"label":"Two base beliefs on the relationship + one liability each combine into a unified architectural tradeoff"},{"node":"mediator-centralizes-observer-distributes","truth_value":"IN","reason":"premise"},{"node":"observers-more-reusable-than-mediators","truth_value":"IN","reason":"premise"},{"node":"gof-observer-unexpected-updates-liability","truth_value":"IN","reason":"premise"},{"node":"gof-mediator-centralizes-control-tradeoff","truth_value":"IN","reason":"premise"}]}}