I’m riding a recumbent bicycle while wearing my smartwatch, hoping that tracking my fitness and health metrics will inspire me to exercise more. The smartwatch is no longer just for texting, music and ...

Dr. Kasy is the author of the book “The Means of Prediction: How AI Really Works (and Who Benefits).” Imagine applying for a job. You know you’re a strong candidate with a standout résumé. But you don ...