{"id":"path-crossing-no-validation","text":"Invalid direction characters (anything not in N/S/E/W) raise an uncaught `KeyError` from the directions dict lookup — no input validation exists.","truth_value":"IN","source":"entries/2026/06/06/path-crossing-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"path-crossing-no-validation","truth_value":"IN","reason":"premise"}]}}