ION: Yes.
SOCRATES: Well, and in discussions about the wholesomeness of food, when many persons are speaking, and one speaks better than the rest, will he who recognizes the better speaker be a different person from him who recognizes the worse, or the same?
ION: Clearly the same.
SOCRATES: And who is he, and what is his name?
ION: The physician.
SOCRATES: And speaking generally, in all discussions in which the subject is the same and many men are speaking, will not he who knows the good know the bad speaker also? For if he does not know the bad, neither will he know the good when the same topic is being discussed.
ION: True.
SOCRATES: Is not the same person skilful in both?
ION: Yes.
SOCRATES: And you say that Homer and the other poets, such as Hesiod and Archilochus, speak of the same things, although not in the same way; but the one speaks well and the other not so well?