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We can sometimes become overly impressed by data which, upon closer inspection, merely suggests credence to a particular argument or idea. Subsequently accepting this hypothesis as true, despite the apparent inadequacies, we fail to see beyond this 'illusion of validity.’ The belief then becomes accepted, incorporating itself in our personal paradigms, with the believer(s) consequently professing vehemently that this is a 'logical’ conclusion drawn from 'objective evidence’ that 'any rational person can see.’
— H. J. Einhorn and Robin M Hogarth, Psychology Review, 85: "Confidence in judgment: persistence of the illusion of validity," 1977
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