{"id":"diagonal-sum-no-input-validation","text":"The function assumes `mat` is a non-empty square matrix and performs no shape or type validation.","truth_value":"IN","source":"entries/2026/06/06/matrix-diagonal-sum-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"diagonal-sum-no-input-validation","truth_value":"IN","reason":"premise"}]}}