I have no issue with admitting that I'm wrong. When it comes to topics that I know very little about, then I typically say at the end of everything that I might be completely off base with it. If I'm proved wrong with something I do know, then I have no problem declaring that I am wrong. I used to be a lot more stubborn about such things, but as I've gotten older, I realized that I'm not always right and will step aside from my thought. I've just come to be more understanding of such things in time.