Logic dictates that there are no literal nonfictional pantomaths, but the word pantomath seems to have been used to imply a polymath in a superlative sense, a ne plus ultra ("nothing more beyond") as it were, one who satisfies requirements even stricter than those to be applied to the polymath. In theory, a pantomath is not to be confused with a polymath in its less strict sense, much less with the related but very different terms philomath and know-it-all.