A mathematician, applied mathematician and a statistician all apply for the same job. At the interview they are asked the question, what is 1+1. The mathematician replies, I can prove that it exists but not that it is unique. The applied mathematician after some thought replies, the answer is approximately 1.99 with an error in the region of 0.01. The statistician steps outside the room, mulls it over for several minutes, and eventually in desparation returns and inquires, so what do you want it to be?