A partner at the elite Wall Street law firm Sullivan & Cromwell wrote an apology letter to a federal bankruptcy judge for a court filing that contained AI hallucinations . Andrew Dietderich, co-head of Global Finance & Restructuring at the firm, said in the April 18 note that a prior filing contained inaccurate citations and other errors, including AI hallucinations. "'Hallucinations' are instances in which artificial intelligence tools fabricate case citations, misquote authorities, or