Three gods: The hardest logic puzzle ever

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Source: http://feeds.newscientist.com/c/749/f/10897/s/26f2cbb4/l/0L0Snewscientist0N0Carticle0Cdn223570Ethree0Egods0Ethe0Ehardest0Elogic0Epuzzle0Eever0Bhtml0Dcmpid0FRSS0QNSNS0Q20A120EGLOBAL0Qonline0Enews/story01.htm

x factor x factor john kerry eastbay Samantha Steele Dec 21 2012 doomsday