AI ‘hallucinations’ in court papers spell trouble for lawyers

US personal injury law firm Morgan & Morgan sent an urgent email this month to its more than 1,000 lawyers: Artificial intelligence can invent fake case law, and using made-up information in a court filing could get you fired. A federal judge in Wyoming had just threatened to sanction two lawyers at the firm who included fictitious case citations in a lawsuit against Walmart. One of the lawyers admitted in court filings last week that he used an AI program that “hallucinated” the cases and apologised for what he called an inadvertent mistake.

AI’s…