Alexander Pruss's Blog

A correspondent asked me why not to simply believe in a restricted Principle of Sufficient Reason (PSR) that says that everything contingent...

Suppose an amoeba biologically symmetrically splits into two cells, A and B . Here are the main options for what happens metaphysically: ...

Sider suggests this four-dimensionalist characterization of “temporary parthood” in terms of temporal parts: Necessarily, x is part of y...

Here’s a fun argument: We are responsible for something. To be responsible for anything that is not a choice, we have to have been respon...

Assume four dimensional unrestricted composition (or mereological universalism). Plausibly, there is a world where on Monday there are infin...

Causal finitism says that every item has a finite causal history. A weaker view is causal countabilism, that all the causal histories of it...

How many objects exist at t is not even partly grounded in facts about how things are at times later than t in worlds without backwards c...

This is another technical research note. Here is a cosmological argument that does not assume causation is transitive. Suppose the set of ...

Some of my posts are basically research notes to self, stored publicly. This is one of those. It is unlikely to be of much interest to other...

Suppose I make a drawing on a one inch square of transparency, and then project it to cover one side of an 40 foot cubical building. How bi...

Suppose I find on the ground a thin layer of sand. Painstakingly, I remove piece of sand after piece of sand, until what is left is a very f...

Here’s one version of the axiom of choice for pluralities in terms of superplurals: AC(plural,superplurals): For a superplurality x x x o...

I’m playing with an alternative way to run the Meyer cosmological argument (with slightly weaker assumptions) . Suppose there is at least o...

Suppose Bob offers a cookie to Alice who is free to accept or reject it. God would like to manifest his omniscience to Alice by announcing t...

Assume Molinism. Suppose T is a set of character traits that makes one be equipoised between freely taking and refusing a $5000 bribe for ...