{"id":"empty-prefix-never-compared","text":"`is_prefix_string` checks equality after appending each word, so the empty string is never compared; this is safe given LeetCode's `1 <= s.length` constraint but would incorrectly return `False` for `s = \"\"`","truth_value":"IN","source":"entries/2026/06/06/check-if-string-is-a-prefix-of-array-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"empty-prefix-never-compared","truth_value":"IN","reason":"premise"}]}}