{"id":"confusing-number-valid-digits","text":"Only digits 0, 1, 6, 8, 9 survive 180-degree rotation; any other digit in the input causes an immediate `False` return via the `rotate` dict membership check.","truth_value":"IN","source":"entries/2026/06/06/confusing-number-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"confusing-number-valid-digits","truth_value":"IN","reason":"premise"}]}}