Sextus Empiricus Pyrrhoniae Hypotyposes 2.14.201

[201] Moreover, from the fact that some things are unable to co-exist—take, for instance, if you like, day and night—both the conjunctive ¹ negation ‟Not day exists and night exists” and the disjunctive ‟Either day exists or night exists” might be considered to be valid. But they consider that their non-co-existence is established both by the negative of the conjunctive and by the disjunctive, arguing ‟Not day exists and night exists; but in fact night exists; day therefore exists not;” and ‟Either it is day or it is night; but in fact it is night; therefore it is not day,” or ‟it is not night, therefore it is day.”