Here’s a strange one I don’t necessarily disagree with (but I’m not sure I agree either:)

“Jazz is an American form of classical music”

According to someone that was in a music history textbook (don’t remember the country but it was in Europe.)

When I was in high school, I heard someone say “I don’t know why poverty exists when we can just 3d print money”. What the 3d has to do with this, I do not know