(Proverbs 9:13 KJV) A foolish woman is clamorous: she is simple, and knoweth nothing.
Notice three traits linked in this verse. First we have “clamorous” (boisterous NASB) (1993). Then we have “simple” (naive NASB) (6615). A person who demonstrates these “knoweth” (3024) “nothing” (1077/4100).
It would seem that this type of person is considered stupid in scripture, or at least ignorant. Barnes says that the phrase “knows nothing” is literally “knows not what.” If I were doing a Pumice Paraphrase here I would say, “Is always saying, ‘Huh?’”
Is the problem ability or attitude? Are people loud and foolish because they can’t do any different or are they obnoxious because they refuse to change or grow up? Which am I? Which are you?
So? Start with yourself first. It will probably take enough time that you will forget to get around to worrying about others.