Last week Thomson Reuters sued legal research platform ROSS alleging that the startup, via a third party, used a bot to siphon Westlaw’s copyrighted material, which it then leveraged to train its AI systems.

A day after the suit was filed, ROSS CEO and co-founder Andrew Arruda denied the allegations in a post published on Medium. While Arruda acknowledged it started working with a third party in 2017, which obtained and passed on content to help ROSS train its AI system, he said no proprietary or copyrighted information was taken.