{"id":"ad-click-dedup-global-not-per-ad","text":"Ad click deduplication keys on `event_id` alone (global registry), not per-ad, converting at-least-once delivery into exactly-once aggregation.","truth_value":"IN","source":"entries/2026/06/05/topic-consistency-models.md","source_url":"","source_hash":"","justifications":[],"dependents":["idempotency-keys-ignore-payload-content"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"ad-click-dedup-global-not-per-ad","truth_value":"IN","reason":"premise"}]}}