"What about medical students - if they know that the difference in diagnosis accuracy between a medium and a top student has been reduced to just 2-3%, why strive to learn more than the other?"
From what I've heard, med school is mostly about memorizing huge amounts of information without a whole lot of critical thinking. But that's a task that computers are infinitely better at than humans. Wouldn't it be a good thing if Watson could free med students from rote memorization, allowing them to instead focus on something that humans are actually good at, like research?