1. Long long long time ago. 2. For conversation training they don’t need to know right or wrong they only need to know the text order. That’s why I feel bullshit from chatgpt is not a bug but a feature. As human being, we bullshit a lot too, our memory messed up and we don’t remember all details. 3. But they also learn from the conversation they generated. If you said this is wrong, he can use this as material to train in the future.