There aren’t many people in the world who can justifiably call Mark Zuckerberg a dumb-ass, but Elon Musk is probably one of them. Early on Tuesday morning, in the latest salvo of a tussle between the two tech billionaires over the dangers of advanced artificial intelligence, Musk said that Zuckerberg’s “understanding of the subject is limited.” I won’t rehash the entire argument here, but basically Elon Musk has been warning society for the last few years