The National Post reports in its Wednesday edition that Elon Musk, the Tesla chief executive officer, and Sam Altman, the OpenAI co-founder, took the stand Tuesday in a high-stakes trial revolving around a bitter feud that could reshape the future development of artificial intelligence. An Associated Press dispatch to the Post says the bickering billionaires' appearances at the Oakland, Calif., federal courthouse foreshadow the start of a legal drama that is expected to brim with intrigue and potentially embarrassing details about the two tech moguls. The jury was elected Monday and the trial is scheduled to take three weeks. Opening arguments began with Mr. Musk's attorney, Steven Molo, who quoted OpenAI's mission statement when it was created as a non-profit for the benefit of humanity as a whole and not constrained by the need to generate financial enrichment for anyone. Mr. Altman and his top lieutenant Brockman, aided by Microsoft, "stole a charity," Mr. Molo said, "a charity whose mission was the safe, open development of artificial intelligence." OpenAI has brushed off Mr. Musk's allegations as an unfounded case of sour grapes that's aimed at undercutting its rapid growth and bolstering Mr. Musk's own XAI.