Fortune cookies are not Chinese. Mozart did not write “Twinkle, Twinkle Little Star.” Dakota Johnson — who did, in fact, invite Ellen DeGeneres to her birthday party back in 2019 — does not love limes: She’s allergic to them.

While we may see ourselves as smart — or at least smarter than the average bear — it appears a lot of the facts and tidbits we hold near and dear to our hearts and egos are actually anything but. Just ask the fine, inquisitive folks of r/AskReddit.

From the truth about the Library of Alexandria to whether or not HR is your friend, here are 20 facts and notions that are simply false.