Ancients and moderns alike have constructed arguments and assessed theories on the basis of common sense and intuitive judgements. This volume brings together a group of philosophers and psychologists to discuss these issues. It contains a collection of essays discussing intuition from two different perspectives. They also cover how psychological research seems to pose serious challenges to traditional intuition-driven philosophical enquiry. The contributors include George Bealer, Robert Cummings, Richard Foley, Alison Gopnik, George Graham, Tamara Horowitz, Joel Pust, Eldar Shafir and Stephen Stitch.