{"id":"empty-string-always-matches-substring","text":"An empty string `\"\"` in `patterns` always increments the count in `numOfStrings`, because `\"\" in word` is `True` for any string `word`.","truth_value":"IN","source":"entries/2026/06/06/number-of-strings-that-appear-as-substrings-in-word-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"empty-string-always-matches-substring","truth_value":"IN","reason":"premise"}]}}