- Jun 14, 2001
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"Reports that say something hasn't happened are always interesting to me, because as we know, there are known knowns; there are things we know we know," Rumsfeld told a news briefing.
"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
Makes perfect sense to me !
http://www.cnn.com/2003/WORLD/europe/12/01/rumsfeld.english.reut/index.html