Mark Zuckerberg doubles down defending A.I. after Elon Musk says his understanding is ‘limited’

On Sunday, while grilling brisket in his backyard in Palo Alto, Calif., Zuckerberg went live on Facebook and responded to a slew of commenters’ questions. One, which Zuckerberg read out loud, said: “I watched a recent interview with Elon Musk and his...