Professor John Broome, University Of Oxford
David Hume claimed that 'reason is the discovery of truth or false-hood' and that 'reason alone can never be a motive to any action of the will'. Hume thought there was no such thing as practical reason. Yet when we wonder what to do, sometimes our reason is plainly engaged. We often do serious reasoning on the way to deciding our actions. What exactly is the role of reason and reasoning in action? This is one of philosophy's ancient questions.