Why did the three men keep their real actions secret from each other in the story the machine that won the war?

In "The Machine That Won the War" by Isaac Asimov, the three men—John Henderson, George Bliss, and the unnamed narrator—keep their real actions secret because each feels their contributions were crucial to the war effort, yet they doubt the effectiveness of the machine that supposedly won the war. They harbor a sense of personal pride and responsibility, believing that their individual efforts, rather than the machine's calculations, were what truly ensured victory. This secrecy reflects their lack of trust in technology and emphasizes the human element in critical decision-making during wartime. Ultimately, it highlights the theme of human agency versus reliance on machines.