Tue, 06 Nov 2012 14:46:21 +0100 blanchet use implications rather than disjunctions to improve readability
Tue, 06 Nov 2012 13:47:51 +0100 blanchet avoid name clashes
Tue, 06 Nov 2012 13:09:02 +0100 blanchet fixed more "Trueprop" issues
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