# Property dualism |  | **Property dualism** describes a category of positions in the philosophy of mind which hold that, although the world is composed of just one kind of substance—the physical kind—there exist two distinct kinds of properties: physical properties and mental properties. In other words, it is the view that at least some non-physical, mental properties exist in, or naturally supervene upon, certain physical substances. | |-|-| | | wikipedia:: [Property dualism](https://en.wikipedia.org/wiki/Property_dualism) |