eg the question whether musical and lettered are different or the same, and whether musical Coriscus and Coriscus are the same, and whether everything which is, but is not eternal, has come to be, with the paradoxical conclusion that if one who was musical has come to be lettered, he must also have been lettered and have come to be musical, and all the other arguments of this sort; the accidental is obviously akin to non being.