The [2016 Tesla promotional] video carries a tagline saying: “The person in the driver’s seat is only there for legal reasons. He is not doing anything. The car is driving itself.”

https://www.reuters.com/technology/tesla-video-promoting-sel...

Well there you go. It seems clear that most of what Tesla has said is compatible with the application of the word "supervised" without really changing the meaning much. But a few statements, and the overall implication, very much contradict that.