That doesn't really work because it just says whatever half the time. It's very good at making stuff up. It doesn't really get that it needs to tell the truth because all it's doing is optimising for a good narrative.

That's why it says slavery is good, because the only people asking that question clearly have an answer in mind, and it's optimising for that answer.

Also it doesn't have access to other people's sessions (because that would be hella dodgy) so it can't tell you definitively if it did or did not say something in another session, even if it were inclined to tell the truth.