{"id":"keyboard-row-row-map-covers-26-letters","text":"`row_map` maps exactly the 26 lowercase English letters to row indices 0, 1, or 2; any non-alphabetic character causes a `KeyError`.","truth_value":"IN","source":"entries/2026/06/06/keyboard-row-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"keyboard-row-row-map-covers-26-letters","truth_value":"IN","reason":"premise"}]}}