Given this layout, I can't tell whom you're addressing this to: the guy who said "folly" was the better translation?

In any case, I did study German in college, but I'm far from being able to judge what word is accurate. If the word was "Dummheit" that translates literally as "dumb head" but that doesn't mean a German would understand it that way.

Funny how your mind works. I just realized Dummheit doesn't mean "dumb head" like I said; it's "state of being dumb" or, as Google Translate puts it, "stupidity."