Musk trolls Zuckerberg over artificial intelligence remark

Tesla and SpaceX CEO Elon Musk on Tuesday took to Twitter to say Facebook CEO Mark Zuckerberg has a "limited" understanding of artificial intelligence (AI). Earlier, Musk had called AI the "greatest risk we face as a civilisation", to which Zuckerberg responded with, "naysayers...try to drum up these doomsday scenarios...I actually think it is pretty irresponsible."