Few people are better at explaining the science of artificial intelligence than Yejin Choi. She's a computer science professor at the University of Washington, senior research director at the Allen Institute for AI, and the recipient of a MacArthur Fellowship. I thought her recent TED talk was terrific, and I was thrilled to talk to her about how you train a large language model, why it's so hard for robots to pick tools out of a box, and why universities must play a key role in the future of AI research.