Abstract
The final chapter is on the question of immaterial mind, the ghost in the machine. Some time is spent on Cartesian dualism, partly because Descartes is often misquoted and misunderstood, but all the main views are examined, without reaching a definite conclusion. I believe we do not know, we only have beliefs about this, and our beliefs depend on where our faith lies. The book ends by giving some of the implications that I believe follow from this uncertainty.
Keywords: Arthur Koestler, Belief, Cartesian dualism, Descartes, Eliminativism, Epiphenomenalism, Gilbert Ryle, Materialist theories of mind, Property dualism.