Watch this video from a guy who used to believe that Earth was flat:
He now knows that Earth is round but — he says so himself — he used to be completely sure that Earth was flat. It’s so weird how normal he seems. I thought that most people that claimed some strange stuff would do so just to get popular on Youtube. And those that truly believed those crazy theories would be really different — like, you could identify them easily. But if I talked with this guy in real life when he thought Earth was flat, I would most likely not even know that he believed something so strange.
Made me think what crazy stuff people that I know believe in, and I don’t suspect anything. And made me wonder what beliefs I have that are wrong, and I don’t even know it.