Whew, I'm glad it's not just me. I tend not to say anything to people who do this sort of thing. Sometimes after the fact I've asked others if they had the same opinion I did, and often I'm not the only one thinking that so-and-so doesn't have as much of a clue as he/she thinks.

There was one awkward moment where I was talking with someone about some rare fossils I had recently seen -- there are two places in the world where you can see these things, both in very remote areas. Someone interrupted to tell me I had the name wrong (I didn't). She insisted it was X, then Y, then finally Z. Normally I will drop this kind of thing, as it is possible that the other person is right -- but this person was dead wrong and being so obnoxious about it! Just because she has never heard of something doesn't mean it doesn't exist!

You have to love the Wikipedia expert. My boyfriend has a coworker who does that -- he will listen to other people's conversations, google what they are talking about, and then try to jump into the conversation with some random (usually wrong) factoid. It's just bizarre. You have to feel sort of sorry for him because he is so clueless about how to interact with people, but it's disruptive and obnoxious behavior.

I suppose I would like to develop a bit more empathy and feel less irritation with these people. I should probably be focusing on feeling more confidence in my own knowledge. Instead of steaming silently, maybe some day I will call them out on the BS and see what happens