Dirty Face Game - Game dawned 
Game Overview dirty face 
Three people in the house, not allowed to  Inconel 600 Plates speak. Beauty came in and said: At least one of you face is dirty. Three ring watch, no response. Beauty said: You know what? Trio again, epiphany, blushing. Why? Because after a nonsense point out the beauty secret, three people are aware of the Inconel 690 Plates existence of dirty face, but presumed to know each other know the existence of dirty face (because the other two did not face red, indicating that they saw a dirty face), and know each other know he had thought of the previous step ...... cycle Inconel 601 Plates begins, start working together of knowledge, truth: three were dirty face, everyone blushed. 
[Edit] dirty face Game 
This is the role of common knowledge, its role is a little scary powerful. Almost a trick shadowless legs, kill without spilling blood. Before the game table, private calculations have been set opponents to death. However, it is likely the other side is also expected that, in the morning and thought of it, Inconel 617 Plates but to kill. Finally, the formation of double-die situation. 
Of course, in reality, although there is a similar phenomenon, but common knowledge greater role is to reduce transaction costs. Because everyone knows some of the rules, as long as each Inconel 625 Plates of the parties in accordance with the act on it.