You treat bots like humans and humans like bots. It’s all about logic and good/bad faith.
Part of the thing with chatgpt is it’s particularly good at sounding like it knows what is saying, while spewing linguistically-coherent nonsense.
For many (most? Even all to some degree?) of us, we have some idea ingrained in our culture of saying what we think to be true, and refraining from what we don’t. That’s heavily diluted on the internet, but the converse tends to be saying what we think will make people support/agree with us. We’ve grown up (some of us have!) with some feel of how to tell the difference.
GPT (and I guess most human-like chat bots will be similar for now) is more an amoral, or a-scient, attempt to say something coherent based on the training data. It’s different again, but sounds uncannily like what we’re used to from good-faith truth-speakers. I also think it’s like the extreme-end of some cultures that prioritise saying what will make the other person happy, more than what is true.