In January 2020, Robert Williams was arrested by Detroit police for a crime he had not committed. The officers were acting on a tip not from a witness or informant. In fact, not from a person at all

Two stories about the way AI could – in fact, already is – making the world better. In Montana, when Lee Johnson discovered his wife, Yokie, had cancer, he turned to AI – and was surprised by the answers he got. Meanwhile, in Massachusetts Prof Regina Barzilay’s experience with cancer has led her...