There is a moment every developer building with LLMs knows well. The model says something wrong, completely wrong, with total confidence. You catch it. You log it. You note that a hallucination occurred. And then what?
Most teams stop there. They have a hallucination rate. They report it in evaluations. They try to push it down. But they are treating very different problems as if they were the same, which is a bit like a doctor logging “patient is sick” and calling it a diagnosis.