{"id":"common-chars-assumes-nonempty-input","text":"`commonChars` indexes `words[0]` unconditionally and will raise `IndexError` on an empty list, relying on LeetCode's non-empty guarantee.","truth_value":"IN","source":"entries/2026/06/06/find-common-characters-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"common-chars-assumes-nonempty-input","truth_value":"IN","reason":"premise"}]}}