How can we control intelligent systems no one fully understands?

Vasant Dhar is a professor at the Stern School of Business and the Center for Data Science at New York University. The widespread conversations about AI took a new turn in March 2016 when Microsoft launched, then quickly unplugged, Tay, its artificial intelligence chat robot. Within 24 hours, interactions on Twitter had turned the bot, modeled after a teenage girl, into a "Hitler-loving sex robot." This controversy, on the heels of the Feb. 14, 2016, accident of Google's self-driving robot car, has ignited a new debate over artificial intelligence. How should we design intelligent learning machines that minimize undesirable behavior?