The Republic by Plato Part 5 Page 19

argued, for example, that a physician and one who is in mind a physician may be said to have the same nature.

True.

Whereas the physician and the carpenter have different natures?

Certainly.

And if, I said, the male and female sex appear to differ in their fitness for any art or pursuit, we should say that such pursuit or art ought to be assigned to one or the other of them; but if the difference consists only in women bearing and men begetting children, this does not amount to a proof that a woman differs from a man in respect of the sort of education she should receive; and we shall therefore continue to maintain that our guardians and their wives ought to have the same pursuits.

Very true, he said.