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Terra recognita

Terra recognita

Verschenen in: Terra recognita



Donald Rumsfeld: ???Reports that say something hasn???t happened are always interesting to me, because as we know, there are known knowns; these are things we know that we know. We also 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.???