Philosophy of mind is the branch of philosophy that investigates the nature of the mind, mental states, and consciousness, and their relationship to the physical world — its main variants include dualism (mind and body are distinct substances), physicalism/materialism (mental states are ultimately physical), functionalism (mental states are defined by their functional roles), eliminativism (folk mental concepts are radically mistaken), and phenomenology (emphasizing the first-person structure of conscious experience, which is what we talk about most on this show). Is philosophy of mind something you want to know more about? If so, you could start here.
