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Pfft comments on Constructive mathemathics and its dual - Less Wrong Discussion

13 Post author: MrMind 28 February 2013 05:21PM

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Comment author: Pfft 01 March 2013 07:41:41PM 2 points [-]

The problem is that double negation elimination is already equivalent to classical logic (i.e. adding double negation elimination to minimal logic gives the law of excluded middle as a theorem), so there is no "background theory" like ZF to work in.