I have been wrong ONCE in my life. Once, I thought I was wrong, but I wasn't.
Seriously though, if I'm ever proven to have mis-spoke here, I'll admit it. I have no issue with it since I'm not concerned how my reputation will be affected (I'm always going to hate myself, so I just don't care). However, I'm usually very aware if I am ignorant about what I want to speak about, and I just stay silent so I don't have to say "I was wrong".