Another ground for the presumption of genius in the sciences would be if someone were to say and maintain things whose meaning he could not possibly have understood entirely, either owing to the period at which he lived, or by reason of his other utterances; so that he has thus asserted something apparently with consciousness, which he could in fact only have asserted unconsciously. It could, however be readily shown in a number of ways, that even these grounds for the presumption may be delusive in the extreme. F.W.J. Schelling