21 March 2012

Quote of the Day - Rumsfeld

"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 things we know we don't know. But there are also unknown unknowns — the ones we don't know we don't know." 
—Defense Secretary Donald Rumsfeld, Defense Department briefing, 12 Feb 2002.

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