I agree that it is common to believe that the Internet was created by the military so that it would persist during a war and in situations where nodes go offline. I also didn't know that such a claim is considered a misconception by some people. But then again, there are opponents to just about anything these days. Is it really a common misconception? I have no way of knowing nor do I care in the context of this topic. It's yet another of these things that cannot be proved nor disproved. Your evidence is not really evidence. And yes, I refuse to believe and no it is not a mistake. Why do you, for example, insist to believe in your referred sources? Don't you think it is human nature to come up with ideas that make other people seem wrong on the pursuit of academic fame, for example? It seems to apply to your misconception theory. But these same people, when confronted with ideas that threaten their description of the world, will do anything to defend it and while doing so they chant how much they think they like it when new science proves old science wrong, how ironic.