So by this point in the conversation, Jane said she will believe anything Roxy tells her. So Roxy is actually stalling for time to think about how to stop the fake game exploding, not trying to think of a thing to say.

Because those feelings weren’t really his own, since they were just imported to him. And since it was all programmed, it is hard to determined which was his starting point and which were the ones he developed.

AI Philosophies are hard.