Every experienced physician remembers a patient whose diagnosis arrived late, when everyone had accepted the first reasonable explanation and the zebra never got invited into the room. One Question, One AnswerMore physicians are turning to large language models to support their practice—from data organization to clinical thinking. An LLM running hot will sometimes name a diagnosis that a model running cold never mentions at all. Picture asking the same clinical question three times, and letting the model answer a little differently each time, on purpose. But today, medicine still needs to know what often disappeared beneath the clinical logic of the moment.