The setting of The Machine That Won the War is the future of the earth, and a great war had just been won against the enemy race. Two men, Swift and Henderson, are the main characters, and are debating over who really won the war for earth. They are discussing whether or not it was the giant strategy computer known as Multivac, or the men in charge of making the maneuvers and programming the computer.
The author Isaac Asimov is using description and argument as his modes of discourse for the story. In the story, Henderson who is an excitable man, explained that the fact that Multivac was nothing more than a large machine, only capable of doing what it was programmed of doing. Henderson explained that some of Multivac's data might have been unreliable. The great computer was capable of creating a direct battle which earth forces could be used to attack their enemies. However, with Henderson imputing faulty data, this caused some of the battle plans to be unreliable. Henderson's internal conflict between himself losing his job and wanting to keep it made him jingle with the programming until it seemed right.
Quote from The Machine That Won the War, on page 201.
"Since the war is won, I'll tell you what I did. I corrected the data." "How?" asked Swift.
"Intuition, I presume, I juggled them till they looked right. At first, I hardly dared. I changed a bit here and there to correct what were obvious impossibilities. When the sky didn't collapse about us, I got braver. Toward the end, I scarcely cared. I just wrote out the necessary data as it was needed. I even had the Multivac Annex prepare data for me according to a private programming pattern I had devised for the purpose."
The foreshadowing helps the reader see that someone is going to have to act upon...