If a self-driving car gets into an accident, who’s to blame — the person in the car, or the technology powering the vehicle? What about the manufacturer? If an automated job-search tool discriminates based on race or gender, who’s at fault — the software, or the company? We look at the complex ethical challenges central to AI, the fundamental philosophical questions — about human’s relationship with technology — and more practical concerns, about how to best regulate these new tools.