As we know, these 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 that we do not know. But there are also unknown unknowns, the ones we don’t know we don’t know.

Donald Rumsfeld, US Secretary of Defense, 12 February 2002 Department of Defense News Briefing.

Life’s increasingly becoming like this Rumsfeld quote 🙂

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