I shift position sometimes, though I don’t think I’ve ever done a one-eighty by the end of a debate. Honestly, that’s really because I don’t enter into debate unless I’ve already put a lot of the thought into the subject. If the other side introduces things that I can’t account for my M.O. is to admit my ignorance and look into to the new information on my own time to see if it is grounds to update my position. It doesn’t happen often, but it does happen. I’m of the opinion that the only ideas worth keeping are the ones that can withstand challenge, so I’m certainly not going to hold onto a compromised position out of some sort of misplaced pride.
I like to be right, but I don’t have a problem admitting I’m wrong, especially when it means I’m more likely to be right later. It’s an investment really. It’s very good for my pride in the long run.