Gerçek onun hakkında bir şey bilmememdir.
- The truth is that I don't know anything about it.
Seni bilmem ama ben bugün oldukça iyi hissediyorum.
- I don't know about you, but I feel pretty good today.
I dunno the answers to any of those questions, and you dunno and he dunno either.
... you may not know about me. ...
... grandchildren do not know how to read cursive writing ...