Sextus Empiricus Pyrrhoniae Hypotyposes 3.22.177

[177] The term ‟indifferent,” they say, is used in three senses—in one sense, of that which is an object of neither inclination nor disinclination, as for instance the fact that the stars or the hairs of the head are even in number; in another sense, of that which is an object of inclination or disinclination, but not towards this particular object any more than towards that, as in the case of two indistinguishable tetradrachms, when one has to choose one of them; for there arises an inclination to choose one of them, but not this one more than that one; and a third sense of the term ‟indifferent” is, they say, ‟that which contributes neither to happiness nor to unhappiness,” as health, or wealth; for what a man may use now well, now ill, that, they say, is indifferent, and they claim to discuss it specially in their Ethics.