... "Dummheit schützt vor Strafe nicht." - Sprichwort, nach dem Rechtsgrundsatz
"Unwissenheit schützt vor Strafe nicht."

@jnt-AE: Das ist das Sprichwort mit der Unwissenheit.

Aber wie ist das bei "Dummheit"?

Wie wäre es mit: "foolishness is no defense" ??

The reason? Dow was "under the impression that the matter was closed". As anyone except Laveesh Bhandari knows, stupidity is no defence against culpability. ...
www.bhopal.net/opinions/archives/2007/10/pmo_and_friends.html

How about this?

Stupidity is no excuse??

I try to use it all the time ;)

Stupidity is no excuse for bad behaviour. I know many stupid people that don't behave badly! ... Stupidity is no excuse for bad behaviour. ...
www.reptileforums.co.uk/exotics-classifieds/71658-siberian-husky.html

@cobblestone:

Yes, but isn't it 'no excuse FOR something', see above for example.

maybe all the words are in this thread?

you can't use stupidity as your defence??