What do you believe because others believe it, even though your own evidence and reasoning ("impressions") point the other way?
I don't know. If I did, I'd probably try to do something about it. But my subconscious mind seems to have prevented me from noticing examples. I don't doubt that they exist, lurking behind the blind spot of self-delusion. But I can't name a single one.
Feynman: "The first principle is that you must not fool yourself - and you are the easiest person to fool."
What do you believe because others believe it, even though your own evidence and reasoning ("impressions") point the other way?
(Note that answers like "quantum chromodynamics" don't count, except in the unlikely case that you've seriously tried to do your own physics, and it suggested the mainstream was wrong, and that's what you would have believed if not for it being the mainstream.)