If you're seeing this message, it means we're having trouble loading external resources on our website.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Main content
Unit 2: Metaphysics and epistemology
About this unit
Metaphysics is an area of philosophy concerned with what there is in the universe (ontology) and the nature of what exists. Epistemology is a related area interested in knowledge and how we know things about the universe.