There is no worse pseudointellectual than a Very Intellectual and Scientifically Enlightened Person, that much is generally understood outside of scientistic circles.
But I have to say, the so-called "doers" (see: most right-wing public figures) are just as aggravating to me.
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Ironically, it can develop into its own kind of myopic certitude.
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(Though on average "I know nothing," does less damage than "I know for certain.")