Elon Musk said he is “guilty of many self-inflicted wounds” while being questioned in a lawsuit accusing him of promoting a conspiracy theory falsely identifying a California man as a federal agent posing as a neo-Nazi street brawler. But the billionaire also said he didn’t think he had “meaningfully harmed” the Jewish 22-year-old who sued him for defamation. “There’s some risk that what I say is incorrect, but one has to balance that against having a chilling effect on free speech in general, which would undermine the entire foundation of our democracy,” Musk said in a sworn deposition that was...