PPT Slide
Ancient & Medieval Philosophy -- David L. Rouse
And similar 'scientific' rules are given for other cases of the kind. Isn't that so, Phaedrus?
SOCRATES: Bless my soul! It appears that he made a brilliant discovery of a buried art, your Tisias, or whoever it really was and whatever he is pleased to be called after. But, my friend, shall we or shall we not say to him . . .