Heh. You can do whatever you want. The key thing I've realized that doing so CAN derail the discussion. So if you are intentionally changing the subject then it might be a good thing. Otherwise, you may want to make sure to add some qualification to keep the conversation on subject when you call it out. Something like... "By the way 'nucular' is not how it is really said, but I do want to stay on subject so I thought I'd just point that out. If you want to talk more about that let me know when we are done and I'll be happy to expand upon that." Now I don't expect you to do that. This was just an example.