and if we have that, then we can determine the optimal strategy in the play subgame. So, that's what we actually did in [inaudible]. We also have a theorem that says, "If this estimate is within delta of the true Nash equilibrium value, then we can solve for the play subgame and get within delta of the Nash Equilibrium." So, in the [inaudible] , we actually do this. We have this massive game which is simply way too large to solve upfront. So, we come up with a really good strategy just for the early part of the game,