Military leaders succeed in building a computer able to solve any strategic or tactical problem.
They are assembled in front of the new machine and instructed to feed a 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."