Sextus Empiricus Pyrrhoniae Hypotyposes 2.11.109

[109] And very possibly, even should it be granted by way of assumption that expression exists, judgement will be found to be non-existent, it being compounded of expressions not mutually co-existent. ¹ Thus, for example, in the case of ‟If day exists, light exists,” when I say ‟day exists” the clause ‟light exists” is not yet in existence, and when I say ‟light exists” the clause ‟day exists” is no longer in existence. If then it is impossible for things compounded of certain parts to be really existent if those parts do not mutually co-exist, and if the parts whereof the judgement is composed do not mutually co-exist, then the judgement will have no real existence.