Sextus Empiricus Pyrrhoniae Hypotyposes 2.6.57

[57] Let us, then, proceed in our exposition to the intellect. Now those who claim ¹ that we should attend to the intellect only in our judgement of things will, in the first place, be unable to show that the existence of intellect is apprehensible. For when Gorgias, ² in denying that anything exists, denies also the existence of intellect, while some declare that it has real existence, how will they decide this contradiction? Not by the intellect, for so they will be assuming the matter in question; nor yet by anything else, since, as they assert, according to our present assumption there exists nothing else by means of which objects are judged. So then the problem as to whether intellect does or does not exist will not admit of decision or apprehension; and from this it follows, as a corollary, that in the judgement of objects we ought not to attend to the intellect alone, which has not as yet been apprehended.