BRIAN CHRISTIAN is the author of The Most Human Human: What Artificial Intelligence Teaches Us About Being Alive, which was a Wall Street Journal bestseller and a New Yorker favourite book of the year. Alongside Steven Pinker and Daniel Kahneman, he was shortlisted for the Best Book of Ideas prize in the U.K.

TOM GRIFFITHS is a professor of psychology and cognitive science at UC Berkeley, where he directs the Institute of Cognitive and Brain Sciences.