Hubert L. Dreyfus's engagement with other thinkers has always been driven by his desire to understand certain basic questions about ourselves and our world. The philosophers on whom his teaching and research have focused are those whose work seems to him to make a difference to the world. The essays in this volume reflect this desire to "make a difference"--not just in the world of academic philosophy, but in the broader world.Dreyfus has helped to create a culture of reflection--of questioning the deep premises that inform and shape work in artificial intelligence and cognitive science....