 So now we're gonna define some more terms, because this is where game theory gets even more interesting. Perfect information is a construct that exists in game theory. People usually define this at the beginning of any talk about game theory, but it's usually not very useful. Perfect information means something very specific. It means I know everything that has happened in the entire course of the game up to this point. How many games do you play where it's like, you don't know everything. You know, Starcraft is a fog of war. You don't know what the other guy did for the past five minutes, because he shot all your scouts out of the sky, right? You know a little bit, you know he has the things that shoot your scouts out of the sky. But that's about it, right? But if you play maybe without the fog of war, or if you play chess, it's like you can just rewind and look at every move that was made. There is no secret thing that has happened. Nobody's holding a hidden card that they've drawn that you don't know about, right? There are no mysteries, whatever. Both players have all of the information. It is perfect.