Book excerpt: In this unique study Fulford combines the disciplines of rigorous philosophy with an intimate knowledge of psychopathology to overturn traditional hegemonies. The patient replaces the doctor at the heart of medicine. Moral theory and the logic of evaluation replace epistemology as the focus of philosophical enquiry. Ever controversial, mental illness is at the interface of philosophy and medicine. Mad or bad? Dissident or diseased? Dr Fulford shows that it is possible to achieve new insights into these traditional dilemmas, insights at once practically relevant and philosophically significant.