you know or dont know or you dont know you know or you dont know

As we know, there are known knowns;
there are things we know we know.
We also know there are known unknowns;
that is to say, we know there are some things we do not know.
But there are also unknown unknowns;
the ones we don't know we don't know.
this Rumsfeld's famous address won him the "Foot in Mouth Award", if that is worth an award for being self-contradiction or out-of-logic, give me one too.