![]() ![]() But there are also unknown unknowns, the ones we don’t know we don’t know.” The ongoing Russian invasion of Ukraine is full of reminders of the importance of understanding what we know, recognizing what we don’t know, and being open to the idea that there is likely more we don’t yet know. We also know there are known unknowns–that is to say, we know there are some things we do not know. Former Defense Secretary Donald Rumsfeld is remembered for many things, among them his iconic observation that, “There are known knowns–there are things we know we know.
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