Artificial intelligence-powered chatbots are getting pretty good at diagnosing some diseases, but how do chatbots do when the questions are less black-and-white? For example, how long before surgery should a patient stop taking prescribed blood thinners? Should a patient’s treatment protocol change if they’ve had adverse reactions to similar drugs in the past? These sorts of questions don’t have a textbook right or wrong answer—it’s up to physicians to use their judgment.