When you're a boy, other boys are inclined to follow an informative three-step process upon being factually corrected:
1. Shut up, [insert name].
2. I said, shut up already!
3. (Punch face)
It is a succinct and persuasive method of communication. Pretty much any boy with an IQ over 75 rapidly learns the importance of keeping one's opinion of the factual accuracy of other's statements, however wildly agley they might gang, to oneself. This, like many other examples of of delayed-gratification and long-term thinking, is an important aspect of what is called "civilization".