So if Player I chooses 4, Player II should choose, I'm sorry, Player II chooses 4, player I should choose 2, and this is a straight line in between.

如果参与人I选4,参与人II要,说错了,是参与人II选4而I选2,这两点之间是一条直线

耶鲁公开课 - 博弈论课程节选