The Army is supplied with a big brand new computer to support decision making on the battlefield. For weeks the Input Platoon is hammering away at their keyboards all data available: Forces, own, allied and enemy, the units down to the last platoon, reserves, gear, tanks, guns, planes, ammo of all calibres, missiles, commanding officers' talents, sucesses and failures, all own, allied, enemy and so on.
Finally the work is done. All are awaiting the fast and final decisions. The general presses the decision button.
The computer hums a little bit, and then - clickety click - out comes a little sheet: "YES".
Baffled silence. The general asks: "Yes, what?" and the operator puts it in.
The computer hums a little bit, and then - clickety click ... clickety click - out comes a little sheet: "YES, SIR".