Elon Musk and Jack Dorsey sparred Sunday night about Twitter’s mission to become the “most accurate source of information” and the rebranding of its feature Birdwatch – a name the new owner said gave him “the creeps.” The heated back-and-forth began when Musk declared in a tweet, “Twitter needs to become by far the most accurate source of information about the world. That’s our mission.” “Accurate to who?” replied Dorsey, a co-founder and former CEO of the social media site, which Musk bought for an estimated $44 billion.