the rules of the game but you can observe the outcomes of players? >> That's a good question so yes. So, all of our work assumes that we have an accurate model of the world or the game that's being played. I think a lot of these techniques will carry over if you want to try to figure out the structure of the game as you go. There was actually a paper from another student at CMU recently on this problem. So, people are starting to look in this direction, I have not. But it's something that I think is very interesting.