Why some of the smartest people can be so very stupid.

(…) stupidity is perfectly compatible with intelligence: (…) Indeed, in at least some cases, intelligence actively abets stupidity by allowing pernicious rationalisation: when Harry Houdini, the great illusionist, took Arthur Conan Doyle, the inventor of Sherlock Holmes, through the tricks underlying the seances in which Conan Doyle devoutly believed, the author’s reaction was to concoct a ludicrously elaborate counter-explanation as to why it was precisely the true mediums who would appear to be frauds.