X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Fsoftware%2Fmatita%2Flibrary%2Fdemo%2Fpropositional_sequent_calculus.ma;h=42ae9682532ce8f65811f23944ec7e0f2a83cf0c;hb=e880d6eab5e1700f4a625ddcd7d0fa8f0cce2dcc;hp=63d64bebc48d1cd7575e499e5cc15430707fb0c0;hpb=bdbe077ddb0b377823b6806adc8bece82130c992;p=helm.git

diff --git a/helm/software/matita/library/demo/propositional_sequent_calculus.ma b/helm/software/matita/library/demo/propositional_sequent_calculus.ma
index 63d64bebc..42ae96825 100644
--- a/helm/software/matita/library/demo/propositional_sequent_calculus.ma
+++ b/helm/software/matita/library/demo/propositional_sequent_calculus.ma
@@ -244,11 +244,20 @@ theorem soundness: ∀F. derive F → is_tautology (formula_of_sequent F).
     lapply (H4 i); clear H4;
     rewrite > symm_orb in ⊢ (? ? (? ? %) ?);
     rewrite > distributive_orb_andb;
-    autobatch paramodulation by distributive_orb_andb,symm_orb,symm_orb, Hletin, Hletin1,andb_true.
+    demodulate.
+    reflexivity.
+    (*
+    autobatch paramodulation
+      by distributive_orb_andb,symm_orb,symm_orb, 
+         Hletin, Hletin1,andb_true.
+    *)
   | simplify in H2 ⊢ %;
     intros;
     lapply (H2 i); clear H2;
-    autobatch paramodulation by andb_assoc, Hletin. 
+    pump 100. pump 100.
+    demodulate.
+    reflexivity. 
+    (* autobatch paramodulation by andb_assoc, Hletin. *) 
   | simplify in H2 H4 ⊢ %;
     intros;
     lapply (H2 i); clear H2;
@@ -258,7 +267,9 @@ theorem soundness: ∀F. derive F → is_tautology (formula_of_sequent F).
     rewrite > demorgan2;
     rewrite > symm_orb;
     rewrite > distributive_orb_andb;
-    autobatch paramodulation by symm_andb,symm_orb,andb_true,Hletin,Hletin1.
+    demodulate.
+    reflexivity.
+    (* autobatch paramodulation by symm_andb,symm_orb,andb_true,Hletin,Hletin1. *)
   | simplify in H2 ⊢ %;
     intros;
     lapply (H2 i); clear H2;