* Bill Taylor > As he can frequently do far better than this, by using craft and guile, > and more pertinently by using negotiating skills, his minimax strategy > is hardly "optimum" in any meaningful sense of the word.
What do you mean here by "craft and guile"? Psychology? Exploitation of the others weaknesses? Exploitation of the fact that the others compete?
Negotiation changes the games. You still can have that in non-zero-sum games with two players.