1. mystery in spite of the fact that we seem intimately familiar with consciousness in our own case.
2. Descartes' dualism and its problems
3 behaviorism, mind/brain identity theory, functionalism
4 mysterians vs reductionists: Chalmers focuses on reductionist claims, which assert that mind can be
reduced to some type of physical system (such as the brain). A reductionist assumes that a purely
physical account of the mental is possible. As Nagel notes, a critic of reductionism need only argue that a
particular reductionist account of the mind (say reducing talk of the mental to talk about neurological
processes in the brain) does not exhausts the analysis of the mental. The critic need only argue that an
important (subjective) aspect of consciousness has not been explained and remains deeply problematic.
5. Chalmers does not deny that consciousness arises from the brain: "Remarkably, subjective experience
seems to emerge from a physical process. But we have no idea how or why this is. " (Nagel can