And, on the other hand, the physician knows nothing of science, for this
has been assumed to be the province of wisdom.

True.

And further, since medicine is science, we must infer that he does not know
anything of medicine.

Exactly.

Then the wise man may indeed know that the physician has some kind of
science or knowledge; but when he wants to discover the nature of this he
will ask, What is the subject-matter? For the several sciences are
distinguished not by the mere fact that they are sciences, but by the
nature of their subjects. Is not that true?

Quite true.

And medicine is distinguished from other sciences as having the subject-
matter of health and disease?

Yes.

And he who would enquire into the nature of medicine must pursue the
enquiry into health and disease, and not into what is extraneous?

True.

And he who judges rightly will judge of the physician as a physician in
what relates to these?