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+(**** Tactics Tauto and Intuition ****)
+
+(**** Tauto:
+ Tactic for automating proof in Intuionnistic Propositional Calculus, based on
+ the contraction-free LJT of Dickhoff ****)
+
+(**** Intuition:
+ Simplifications of goals, based on LJT calcul ****)
+
+(**** Introduction heuristic w.r.t. the dependent products:
+ - Initially: Intros until the first non-dependent product and Intros of all
+ the non-dependent products
+ - In the algorithm: Intros only the non-dependent products ****)
+
+(* Fails because False is after a dependent product which is after a
+ non-dependent product *)
+Goal (x,y:nat)x=y->(z:nat)False->x=z.
+Proof.
+ Tauto.