Most AI evaluation ends with a score. That is useful, but it does not answer a narrower question: is this particular output strong enough to release without asking a person again? I built Chiron for the cases where the answer can be established exactly. It is an exact-or-refuse evidence gate for supported structured outputs. For sequence-style data, Chiron recovers a constrained candidate rule and then tests it on held-out terms it did not see. Exact prediction earns verified: true ; a fo...