{"id":"deletion-visibility-is-symmetric","text":"The same three-condition visibility rule (committed, not in active_at_start, lower tx_id) is applied independently to both the creating and deleting transaction of a version — `_is_visible` runs the same logic in two phases.","truth_value":"IN","source":"entries/2026/05/29/snapshot-isolation-mvcc_database-_is_visible.md","source_url":"","source_hash":"","justifications":[],"dependents":["mvcc-three-layer-visibility-model"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"deletion-visibility-is-symmetric","truth_value":"IN","reason":"premise"}]}}