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Date: 2013-07-04 21:59:22Logic If and only if FO Question Raymond Smullyan Knights and Knaves Logic puzzles Mathematics The Hardest Logic Puzzle Ever | The Hardest Logic Puzzle Ever1 By George Boolos S O M E YEARS A G O , T H E L O G I C I A N A N D P U Z Z L E - M A S T E RAdd to Reading ListSource URL: www.thebigquestions.comDownload Document from Source WebsiteFile Size: 177,15 KBShare Document on Facebook |