"One of the most prevalent fallacies is the so-called genetic fallacy, which tempts men to argue that the first lowly origins of a thing demonstrate what it essentially is even in its most highly developed forms. Psychoanalysis and anthropologists have sometimes specialized in tracing the golden fruits to their grubby roots, and they have had some success in convincing the credulous that greatness is only triviality writ large. A kindred fallacy—which to state is to expose—teaches that the surest way of understanding a type is to inspect its poorest instances."