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 …

Substantivalists believe that there are regions of space or spacetime. Many substantivalists
also believe that there are entities (people, tables, social groups, electrons, fields, holes …

Material objects persist through time and survive change. How do they manage to do so?
What are the underlying facts of persistence? Do objects persist by being" wholly present" at …

1 Natural Language, Literal Parthood, and Philosophical Mereology 17 1.1 Mereology and
the lexical meaning of “part” 17 1.2 “Part” and cognate terms: Three distinctions 18 1.3 …

There are various arguments for the metaphysical impossibility of time travel. Is it impossible
because objects could then be in two places at once? Or is it impossible because some …

This paper is a systematic exploration of non-wellfounded mereology. Motivations and
applications suggested in the literature are considered. Some are exotic like Borges' Aleph …

Mereological principles are often controversial; perhaps the most stark contrast is between
those who claim that Weak Supplementation is analytic—constitutive of our notion of proper …

There is an extensive literature on time travel in both philosophy and physics. Part of the
great interest of the topic stems from the fact that reasons have been given both for thinking …

The dominant theory of parts and wholes–classical extensional mereology–has faced a
number of challenges in the recent literature. This article gives a sampling of some of the …

Mereological principles are sometimes used to support general claims about the structure
and arrangement of objects in the world. I focus initially on one such mereological principle …