A philosopher is perhaps the last person you'd expect to have a hand in designing your next car, but that's exactly what one expert on self-driving vehicles has in mind. Chris Gerdes, a professor at Stanford University, leads a research lab that is experimenting with sophisticated hardware and software for automated driving. But together with Patrick Lin, a professor of philosophy at Cal Poly, he is also exploring the ethical dilemmas that may arise when vehicle self-driving is deployed in the real world.