In recent years, the field of cognitive psychology has begun to explore the rootedness of rational thinking in subrational inspiration, insight, or instinct—a kind of prediscursive hunch that leaps ahead and guides rational thought before the reasoning human being is even aware of it. In The Music of Reason , Michael Davis shows that this «musical» quality of thinking is something that leading philosophers have long been aware of and explored with great depth and subtlety. Focusing on...