http://en.wikipedia.org/wiki/There_are_known_knownsThere are known knowns; there are things we know that we know.—United States Secretary of Defense, Donald Rumsfeld
There are known unknowns; that is to say, there are things that we now know we don't know.
But there are also unknown unknowns – there are things we do not know we don't know. ”
The above statement was made by Rumsfeld on February 12, 2002 at a press briefing where he addressed the absence of evidence linking the government of Iraq with the supply of weapons of mass destruction to terrorist groups.
Saturday, August 31, 2013
Donald Rumsfeld Unknown Unknowns ! (English)
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