Third Circuit: Training an AI Tool on Westlaw Headnotes to Compete with Westlaw Is Not Fair Use
Written by Josh Geller Thomson Reuters Enterprise Centre GmbH v. ROSS Intelligence Inc., No. 25-2153 (3d Cir. Sept. 29, 2026) On September 29, the Third Circuit affirmed the U.S. District Court’s 2025 ruling that ROSS Intelligence infringed Thomson Reuters’s copyrights when it used Westlaw headnotes to train a competing legal research tool, and that the use was not protected as fair use. The ruling is … Continue reading Third Circuit: Training an AI Tool on Westlaw Headnotes to Compete with Westlaw Is Not Fair Use
