Testily taking the stand against his AI rival, the world’s richest man presented himself as a man on a humanitarian mission to save the planet. That’s not what we mere mortals witnessed, says Chris Stokel-Walker W e’re learning many things from the trial Elon Musk has brought against OpenAI that is being heard this week in a California court. As part of the discovery process, Musk was asked about whether he had used “rhino ket” at a festival – something he flatly denied, while OpenAI