to general-sum games it's a bunch of theoretical challenges the pop-up. So, right now, we don't know how to cope with those challenges. But dealing with general-sum games is really important because most real-world situations are general-sum and not not zero-sum, except for like maybe military interactions or security. So, in particular working out something like negotiation, I think is a really interesting line of research. In general moving things more towards real-world domains, I think we're at the point right now where we