Alexander Pruss's Blog

The following argument is sound (given Christian doctrine), where possibility and necessity are metaphysical throughout: It is possi...

Argument 1: Possibly, the Principle of Sufficient Reason (PSR) is true. Necessarily, if the PSR is true, then there is a causally effic...

For any perfection P , there are two fairly natural hypothesis: God has P to an infinite, maximal degree (e.g., knows everythin...

To identify myself in the relevant sense with some quality is to see that quality as embodying a particularly important feature of myself,...

Start with this rough principle: If a hypothesis that is both simpler and weaker can cover the same data, we should prefer it to...

I think the following argument is sound, at least if the conditionals are material. (Premise for reductio) Naturalism is true. ...

Suppose A is earlier than B and A causes B . Some possibilities. Suppose A is present and B is future. We say: A will c...

The Principle of Sufficient Reason (PSR) says that every contingently true proposition has an explanation. Suppose you are impressed ...

And here is yet another argument that is sound (given that theism is true): Alexander Pruss couldn't be the greatest being....

Here is a quick heuristic about social policy. Suppose it is in the social interest to decrease pregnancy rates in some population of teena...

When loving parents make decisions concerning their teenage children, they put very small, if any, weight on the physical pleasur...

Let's bracket all moral concerns, and simply suppose that the parent does not count sexual activity by her minor children as h...

This is an outline with proofs omitted. Start with a notion of necessity L that satisfies the constraints of System T and take a...

Radical Essentiality of Origins (REO) is the thesis that the complete origins of an entity x are necessary and sufficient to the ...

Here's another argument against gear-minds. Start with the intuition that one cannot make a mind cease to exist without causa...