About author
- Author's profession: Leader
- Nationality: deutsch
- Born: November 10, 1483
- Died: February 18, 1546
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Reports that say something hasn't happened are interesting to me, because as we know, there are known unknowns; 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