Not if there's a player for whom defecting is always better than cooperating, no matter what the other players do. And not if there's another player for whom co

Not if there's a player for whom defecting is always better than cooperating, no matter what the other players do. And not if there's another player for whom cooperating is always better than defecting, no matter what the first player does. Then the first player should always defect and the second always cooperate.