{"id":"palindrome-perm-parity-reduction","text":"The solution reduces character frequencies to their parity (odd/even) via `c % 2`, discarding actual counts — a common idiom in palindrome problems","truth_value":"IN","source":"entries/2026/06/06/palindrome-permutation-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":["palindrome-construction-reduces-to-frequency-parity"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"palindrome-perm-parity-reduction","truth_value":"IN","reason":"premise"}]}}