> Maybe the mistakes done by the speaker were too great to be ignored Still not appropriate behavior. Ideally, you bring up your point, have a brief discussion

> Maybe the mistakes done by the speaker were too great to be ignored Still not appropriate behavior. Ideally, you bring up your point, have a brief discussion, and then, if you still feel the speaker is wrong, you take it offline. You don't have to pretend to agree with him or her -- you can say, "Well, I disagree, but let's talk more about it when you're done."