{"id":"no-zero-invariant","text":"The `min(a,b)*10 + max(a,b)` formula in `smallest_number_with_at_least_one_digit_from_each_array` assumes digits are 1-9; a zero in either array would produce an incorrect single-digit result instead of a two-digit number.","truth_value":"IN","source":"entries/2026/06/06/form-smallest-number-from-two-digit-arrays-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"no-zero-invariant","truth_value":"IN","reason":"premise"}]}}