FILE PHOTO: AI (Artificial Intelligence) letters are placed on computer motherboard in this illustration taken, June 23, 2023. REUTERS/Dado Ruvic/Illustration/File Photo/File Photo/File Photo Purchase Licensing Rights, opens new tab May 29 (Reuters) - At many law firms, calling a colleague at 2 a.m. is a last resort. At Ohio-based law firm Vorys, Sater, Seymour and Pease, the colleague is always awake — because it's AI.