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Brightline crash, neighbor shooting highlight perils of 'unknown unknowns' | OpinionI found myself thinking of former Bush administration Secretary of Defense Donald Rumsfeld ... “There are known unknowns. That is to say, there are things that we know we don’t know ...
Former US Secretary of Defense Donald Rumsfeld famously talked about "known knowns" (things we know we know), "known unknowns" (things we know we don't know), and "unknown unknowns" (the things we ...
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