This means that Player two because they did not observe how the coin landed, they do not know which of those two states they were actually in. So, why do you imagine that you are Player two in this game and yeah, so why do you imagine that you are Player two in this game, you've just observed Player one chooses play action and so you know that you are in this imperfect information subgame. So, what should you do? Should you guess heads or should you guess tails? But one option is to just always guess heads. But if you do that, that's