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when toggle format what by license comment
Feb 27, 2010 at 9:26 vote accept Francesco Turco
Feb 26, 2010 at 17:40 comment added Neel Krishnaswami That's a good point, Charles -- I am sorry to say I forgot entirely about classical logic!
Feb 26, 2010 at 16:45 history answered Charles Stewart CC BY-SA 2.5