In this lecture we discuss two competing solutions to the mind-body problem. First, we look at the identity theory of mind, or reductive materialism, which says that the mind is identical to the brain. Then, we look at property dualism, which agrees with the materialist that there is only one type of substance but differs on the type of properties the substance can have. Copyright 2013 Jack Reynolds / La Trobe University, all rights reserved. Contact for permissions.