…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.
Donald Rumsfeld, 2002
Quoted in BBC News, Nov. 30, 2007
(http://news.bbc.co.uk/1/hi/magazine/7121136.stm)
Nicely done, Mitch.
LOL