I once met a guy whom I told I some times had lucid dreams. He replied matter factly - lucid dreams don't exist, with the same of contempt you'd tell a creation

I once met a guy whom I told I some times had lucid dreams. He replied matter factly - lucid dreams don't exist, with the same of contempt you'd tell a creationist that God doesn't exist. I said they do exist because I've had them before. At this point from his look he must believe I'm perhaps trolling him, like I'm claiming that I can fly or become invisible. After a lot of back and forth and a lot of condescension from him, he eventually admits he doesn't know what a "lucid dream" is. So he just thought it meant something like "I have visions in my dreams and they predict the future", and assumed that's what I meant without even bothering to check. You wouldn't believe the kind of stupid people you meet at physics conferences.