How does the allegation make any sense?

AI labs can hardly just throw random confidential data into the training and then hope it does not leak into the output of their model in an obvious way.

If that would be found it would destroy their main source of revenue, it could became a major national security or healthcare enforcement matter, and result in criminal investigations.

I downvoted because the reply has nothing to do with the argument.

If I know for a fact that you're cheating on your wife, and someone else asks how I know that, then a third person chirping about your sketchy business dealings is entirely irrelevant to the question, no matter how much suspicion it might otherwise raise.

[dead]