{"id":"xor-cancellation-finds-extra-char","text":"`findTheDifference` uses XOR cancellation (`reduce(xor, ...)`) over the ordinals of `s + t` to isolate the single extra character — every matched character cancels to zero.","truth_value":"IN","source":"entries/2026/06/06/find-the-difference-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":["xor-universal-bit-primitive"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"xor-cancellation-finds-extra-char","truth_value":"IN","reason":"premise"}]}}