This is the infamous one from Donald Rumsfeld. Anyone know any other corkers?
"There are known knowns. These are things we know that we know.
There are known unknowns. That is to say, there are things that we know we don’t know.
But there are also unknown unknowns. There are things we don’t know we don’t know"
Although the speaker of the quote was a knucklehead, he was expressing an essential truth - not sure what the problem is with the quote (as opposed to the quotee...)
Nixon said "I think you would have to conclude that this is a great wall and it must have been built by a great people". The media conveniently forgot to report the second bit.