Musk sued his OpenAI co-founders Sam Altman and Greg Brockman, alleging they had violated a promise to keep their company a nonprofit.

Musk’s lawsuit accusing Altman and OpenAI of abandoning their mission as a non-profit has shed light on their workings at the artificial intelligence giant.

Elon Musk’s lawyer began his cross examination of OpenAI CEO Sam Altman in court on Tuesday with a brief question: “Are you completely trustworthy?”