This is CNBC's live coverage of the fourth day of the trial between Elon Musk and Sam Altman in Oakland, California. Read day 3 coverage here . What you need to know Elon Musk will conclude his testimony on Thursday as the trial in his lawsuit against OpenAI CEO Sam Altman rolls into its fourth day. OpenAI's attorney, William Savitt, cross-examined Musk for several hours on Wednesday, and the two men clashed repeatedly. Musk accused Savitt of lying and asking misleading questions that were "