Modal metaphysics is a branch of metaphysics that deals with the concepts of possibility, necessity, and contingency. It explores the nature and status of different kinds of existence—what it means for something to exist in a certain way, and what it means for something to be possible or necessary. Key concepts in modal metaphysics include: 1. **Possible Worlds**: The idea that there are multiple ways the world could have been, often referred to as "possible worlds.
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