World War III. The US has succeeded in building a computer able to solve any strategic or tactical problem.
Military leaders are assembled in front of the new machine and instructed to feed difficult tactical problem into it. They describe a hypothetical situation to the computer and then ask the pivotal question: attack or retreat?
The computer hums away for an hour and then comes up with the answer: YES.
The generals look at each other, somewhat stupefied.
Finally one of them submits a second request to the computer: YES WHAT?
Instantly the computer responded: YES SIR!