This collection investigates the intersection of Cartesian metaphysics, the nature of mental causation, and the logical relationship between conceivability and possibility. Stephen Yablo, a prominent philosopher known for his work in modal logic and the philosophy of mind, compiles twelve essays that analyze how mental states interact with physical reality. By examining the conditions of disembodied existence and the theory of content, Yablo provides a rigorous framework for understanding the ontological status of the mind within a physicalist world.

Philosophers and students of metaphysics frequently cite this collection as a vital resource for understanding contemporary debates regarding Cartesian themes. Experts highlight the technical precision of Yablo's arguments and the clarity with which he addresses complex issues in modal logic.