A mathematician, an accountant, and an economist were all vying for the same job.
The interviewer called in the mathematician and asked “What does two plus two equal?”
The mathematician replied “That’s easy. Two plus two equals exactly four.”
Next the interviewer called in the accountant and asked the same question.
The accountant explained “Typically four, give or take ten percent, but on average, two plus two is about four.”
Finally the interviewer called in the economist and posed the same question, “What does two plus two equal?”
The economist got up, locked the door, closed the shades, and sat down next to the interviewer before asking, “What do you want it to equal?”