Sextus Empiricus Pyrrhoniae Hypotyposes 3.16.112

[112] Some also argue thus: ¹ If a thing becomes, either the existent becomes or the non-existent. But the non-existent does not become; for to the non-existent nothing can occur; neither, therefore, can becoming occur. Nor does the existent become. For if the existent becomes, it becomes either in so far as it is existent or in so far as it is non-existent. Now in so far as it is non-existent it does not become. But if it becomes in so far as it is existent, then, since they assert that what becomes becomes other from other, ² what becomes will be other than the existent, and that is non-existent. Therefore what becomes will be non-existent, which is nonsense.