Alexander Pruss's Blog

Aristotle’s positing matter is driven by trying to respond to the Parmenidean idea that things can’t come from nothing, and hence we must po...

A standard puzzle for the opponent of the Principle of Sufficient Reason (PSR) is to explain why we don’t observe objects coming into existe...

Consider the Grim Reaper (GR) paradox. Fred’s alive at midnight. Only a GR can kill him. Each GR has an alarm with a wakeup time. When the a...

Consider these three theses: There is at most one empty world, i.e., world where nothing exists. Presentism is true. Something can come ...

Suppose I insisted that the Big Bang happened due to a cat generating an extremely high energy hairball. You would think I’m crazy. But why ...

Suppose that a lot of otherwise ordinary coins come into existence ex nihilo for no cause at all. Then whether a given coin lies heads or t...

Imagine a countably infinite multiverse where there are no spatial relations between the different universes, but it makes sense to talk of ...

According to presentism, events come out of nothing (the future), have a flash of reality as they are briefly present, and then pass bac...