The five big questions

What is real?

Metaphysics

The nature of reality, existence and the universe.

How do we know what we know?

The nature, limits and sources of knowledge.

What is the right way to act?

Moral principles, values and the difference between right and wrong.

What is valid reasoning?

Arguments, inferences and what follows from what.

What is beautiful?

Art, beauty, taste and why some things feel worth attending to.