From the archive: The race to create a perfect lie detector, and the dangers of succeeding

We are raiding the Guardian Long Read archives to bring you some classic pieces from years past, with new introductions from the authors. This week, from 2019: AI and brain-scanning technology could soon make it possible to reliably detect when people are lying. But do we really want to know?. Help support our independent journalism at theguardian.com/longreadpod