Dualism is the theory that the mental and physical parts are different but interact with each other to produce an outcome. Functionalism is about what mental states are, what makes something depend on its function, or the role it plays. It is therefore compatible with substance dualism as Functionalism also heavily relies on "interaction" and it seperates the mind and the body. According to this theory, all and only beings with internal states that meet certain conditions, or play these roles, are capable of experencing something in a certain way. Functionalism claims that no beings with brains different than ours can share our experiences, despite similar behavior and internal organization similar to our own, and thus functionalism, with
