Abstract

There sits my trusty coffee mug. Just like yesterday, only a bit grungier. So how does it persist through time and change? Is it wholly present at every moment during which it exists, as the friends of endurance think? Or is it a four-dimensional space-time worm that has different parts at different times, as the friends of perdurance think? Or is it instead a momentary object related in various to-be-spelled-out ways to other momentary objects existing at other times? In How Things Persist, Katherine Hawley follows Theodore Sider in defending the third of these three views.