and that's where these expected values are coming from. So, we have this a rough approximation of what the Nash equilibrium is for the entire game, and that's giving us expected values for all these different actions, but they're not perfect. It's like with AlphaZero for example. AlphaZero gives you policy and values for all the different states that you might be in, but that's obviously not perfect and you can improve upon it by doing Monte-Carlo tree search in real-time. >> What do you mean formally by the safe technique to exploitability.