{"id":"counter-intersection-is-elementwise-min","text":"`Counter.__iand__` (`&=`) keeps the minimum count of each key present in both operands, implementing multi-set intersection.","truth_value":"IN","source":"entries/2026/06/06/find-common-characters-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"counter-intersection-is-elementwise-min","truth_value":"IN","reason":"premise"}]}}