When Donald Rumsfeld was Secretary of Defense, he coined some phrases about knowledge that apply far beyond military matters. Secretary Rumsfeld pointed out that there are some things that we know that we know. He called those "known knowns." We may, for example, know how many aircraft carriers some other country has. We may also know that they have troops and tanks ... MOREThomas Sowell: Economy Plagued By Unknown Unknowns
When Donald Rumsfeld was Secretary of Defense, he coined some phrases about knowledge that apply far beyond military matters. Secretary Rumsfeld pointed out that there are some things that we know that we know. He called those "known knowns." We may, for example, know how many aircraft carriers some other country has. We may also know that they have troops and tanks ... MORE