Based on my limited experience, I would say the doctors are making educated guesses, and most of the time they are guessing right, but you would not go to a doctor who admits he is guessing any more...
Well, I'm going to hazard a guess and say you're thinking of Chris Tucker, an actor in the movie "The Fifth Element" who played a talk show host Ruby Rhod. Rent the movie, watch it. It's hilarious,...