{"id":"lsm-compaction-output-is-correct","text":"LSM compaction produces correct merged output: tombstones are properly purged from the output SSTable, and the k-way merge is forward-only preserving sort order.","truth_value":"OUT","source":"","source_url":"","source_hash":"","justifications":[{"type":"SL","antecedents":["compact-purges-tombstones","sstable-merge-forward-only"],"outlist":["compact-no-concurrency-safety"],"label":"merge logic is correct but concurrent access during compaction can corrupt shared mutable state"}],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"lsm-compaction-output-is-correct","truth_value":"OUT","reason":"SL justification invalid","failed_antecedents":[],"label":"merge logic is correct but concurrent access during compaction can corrupt shared mutable state","violated_outlist":["compact-no-concurrency-safety"]}]}}