I gave two AI models the same 200 pieces of code, the same prompt, the same question. One of them removed 51% of the false alarms. The other removed only 20% of the false alarms — and confirmed 90% of everything it was shown. Same inputs. Same instructions. A 2.5× difference in the only thing I was measuring. The model that failed isn't a bad model. It's a well-regarded commercial model from a frontier lab. It failed at this task for a specific, predictable reason: I told it that a s...