The Pentagon wants $30 million to build an AI-powered lie detector

A polygraph tracks body signals such as heart rate and breathing, on the theory that lying changes them. The Pentagon's proposed Polygraph+ program would score those signals with machine learning and add standoff sensing, which reads those signals without touching the person. Experts are skeptical, since a racing pulse can signal nerves as easily as a lie, and tech-based lie detection has a long record of failure.

Summary edited by the HowTechMoves team, based on reporting by MIT Technology Review.