Sam Altman, OpenAI's chief executive, said in court papers that Mr. Musk had "no facts" to support his claim that OpenAI was illegally suppressing competition. "There are no facts to support the existence of such a conspiracy," Mr. Altman's lawyers wrote to a federal judge in Oakland, California, in a 33-page court filing. Nor has Mr. Musk proved he suffered any harm as a result of OpenAI's alleged anti-competitive behaviour, the lawyers argued. Musk is long...