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| Bonner schrieb am 19.05.2016 um 10:05 Uhr &qtru;Theoe are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we now know we don’t know. But there are also unknown unknowns. These are things we do not know we don’t know." - Donald Rumsfeld. |