You probably don’t remember the Humane Pin, despite its dominating the tech-news cycle a few months ago. It’s an elegant AI-powered square that sticks to your lapel and can send messages, search for information and tell you about what you’re seeing, all through voice commands. The Humane company raised more than $230 million in venture backing, and its rollout included a runway appearance at Paris Fashion Week, a TED talk and a chic announcement video where the pin repeatedly misinformed its user. According to the pin, almonds have far more protein than they do, and April’s solar eclipse would have...