Preuves dans CC de
Preuves dans CC de

        dégénérescence des propositions
                    <->
        tiers-exclu /\ extensionnalité propositionnelle

et dans CCI de

  extensionnalité propositionnelle -> indiscernabilité des preuves


git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@2960 85f007b7-540e-0410-9357-904b9bb8a0f7

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