ABSTRACT
If time is limited, then it begins at some time and ends at some time. But if time begins at some time and ends at some time, then there must have been times before and after time exists, which is absurd. So time is not limited. Yet suppose, instead, that time is not limited; given this supposition, Sextus adopts and expands a version of an argument from Aristotle. Part of time is past, part present, and part future. If the past and future do not exist, then only the present exists. If only the present exists, then time is limited (to the present). But the previous considerations make it impossible that time is limited. So the past and the future must exist. But if the past and future do exist, then the past and future are present, which is absurd. Hence time is not unlimited. Since time is neither limited nor unlimited, and every existent thing must be one or the other, time does not exist.
