Wed, 20 Feb 2013 17:31:28 +0100 blanchet generalize syntax of SPASS proofs
Wed, 20 Feb 2013 17:15:06 +0100 blanchet tweaked hack some more
Wed, 20 Feb 2013 17:12:21 +0100 blanchet more simplifying constructors
Wed, 20 Feb 2013 17:05:24 +0100 blanchet remove needless steps from refutation graph -- these confuse the proof redirection algorithm (and are needless)
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