...ient alternative. Such was the argument of Euthydemus, to prove, for example, that a man knows that there is a trireme in the Piraeus, because he knows the existence of two things, the Piraeus and the trireme; or that, when one knows the letters, one also knows the word made of them, for word and letters are the same thing. Further, since twice so much is unwholesome, one may ar...