Intelligence Squared U.S. has debated Artificial Intelligence (AI) before – the risks, the rewards, and whether it can change the world – but for the first time, it debates with AI. IBM Project Debater is the first AI system designed to debate humans on complex topics using a combination of pioneering research developed by IBM researchers, including: data-driven speechwriting and delivery, listening comprehension, and modeling human dilemmas. Project Debater faces world-class debater Harish Natarajan, on a motion that was given to them fifteen minutes before the debate began: "We Should Subsidize Preschool". Will Project Debater change your mind?