Fundamental to von Neumann's approach was the assumption that both players were as clever as von Neumann himself. (...)The second problem is that game theory becomes less useful if your opponent is fallible. If player two is not an expert, player one should play to exploit his mistakes rather than defend against brilliant strategies that will never be found. The worse the opponent, the less useful the theory is.

It is a nice quote, isn’t it?

From Logic of Life.