Are you a person of information?

You know those things that people get wrong and it really annoys you? I'd like to hear two of them. Preferably, one should be more specialized knowledge that you'd like to educate people about. Here are mine:

Everyone ought to already know: Bees do not bite. They sting.

I'd like you to know: There's no such thing as a "kudo". Kudos is a Greek word, right out of Homer. It's singular, not plural. It means glory or renown. So, you can say "Kudos to you" but not "I give you one kudo".

Go on, educate me!