MIT's Kate Darling, who writes the rules of human-robot interaction, says an AI-enabled apocalypse should be the least of our concerns. A s a law student in Switzerland, Kate Darling's interest in robots was just a hobby. She had purchased a PLEO robot dinosaur that was designed to respond to human contact emotionally and act independently. "It really struck me that I responded to the cues the robot was giving me, even though I knew exactly how the toy worked," Darling says. "I knew where all the motors were and how it worked, and why it would cry when you held it up by the tail, but I was just so compelled to comfort it and make it stop crying."