>> So it show that we are not completely rational and selfish here. Sure we are. "Give me half the money, or you get none". That's a perfectly rational plan to

>> So it show that we are not completely rational and selfish here. Sure we are. "Give me half the money, or you get none". That's a perfectly rational plan to force the other party to maximise your reward. The risk is that the second player gets nothing, sure, but that's the ideal of profitable financial strategies, no? You take risks, you maximise your gains. Me? I'd ask for 99.9999% and watch the first player squirm and sweat. Come on chap, show me how you rationally maximise your gains!