"Occam's razor – that's what I follow. How often in your career do you see truly 'rare' diseases? Pretty much never," you hear a colleague say.

"Remember Hickam's dictum! What if you do get that one patient in a million? You need to keep an open mind," another colleague retorts.

Attempting to relax in the on-call room, you wish that they'd just shut up so that you can have your dinner in peace. Unfortunately, your pager buzzes a few seconds later. You're needed in the ED. Putting your dinner aside, you quickly rush over there.