From Ader v. Ader, decided last week by N.Y. trial court judge Joel M. Cohen:

This case adds yet another unfortunate chapter to the story of artificial intelligence misuse in the legal profession. Here, Defendants' counsel not only included an AI-hallucinated citation and quotations in the summary judgment brief that led to the filing of this motion for sanctions, but also included multiple new AI-hallucinated citations and quotations in Defendants' brief opposing this motion. In other words, counsel relied upon unvetted AI — in his telling, via inadequately supervised colleagues — to defend his use of unvetted AI….