{"id":"counting-elements-iterates-arr-not-set","text":"`count_elements` iterates the original list (not the set) so duplicates contribute independently to the count — `[1, 1, 2]` returns 2, not 1.","truth_value":"IN","source":"entries/2026/06/06/counting-elements-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"counting-elements-iterates-arr-not-set","truth_value":"IN","reason":"premise"}]}}