We may never know, but it's hard to believe he had no idea whatsoever of their nature, being the great intellect that he was and understanding the field as thoroughly as he did.
S-ar putea să nu aflăm niciodată răspunsul la această întrebare dar pare greu de crezut că nu avea nicio idee despre natura lor, fiind marele intelectual care a fost şi înţelegând domeniul atât de bine.