Mind and Body. Do you think the mind and the physical brain are two separate things, or really just one thing? How does Descartes explain the difference between mind and body? What qualities does mind have that body does not, and vice versa? What is the difference between physical and mental states? What is the mind-body problem? What examples do critics offer to show that mind and body are not really two different things? How does J. C. C. Smart argue that the mind and brain are the same thing? Which side do you think makes more sense, and why?