Material objects extend through space by having different spatial parts in different places.
But how do they persist through time? According to some philosophers, things have …

Ryan Wasserman presents a wide-ranging exploration of puzzles raised by the possibility of
time travel, including the grandfather paradox, the bootstrapping paradox, and the twin …

We take it for granted that a person persists over time: when we make plans, we assume that
we will carry them out; when we punish someone for a crime, we assume that she is the …

The debate over persistence is often cast as a disagreement between two rival theories—the
perdurantist theory that objects persist through time by having different temporal parts at …

The philosophical problem of identity and the related problem of change go back to the
ancient Greek philosophers and fascinated later figures including Leibniz, Locke, and …

This is a paper about the nature of metaphysical laws and their relation to the phenomenon
of vagueness. Metaphysical laws are introduced as analogous to natural laws, and …

Science should tell us what the world is like. However, realist interpretations of physics face
many problems, chief among them the pessimistic meta induction. This book seeks to …

Philosophers often state that the persistence of objects in vision is experienced differently
than the persistence of sounds in audition. This difference is expressed by using metaphors …

How does Classical Extensional Mereology (CEM) interact with time and modality? In its first-
order logical setting, CEM does not have the formal tools to deal with these dimensions …

An object is a simple if and only if it has no proper parts. An object is gunk if and only if every
proper part of that object itself has a proper part. In my dissertation, I address the following …