--- /dev/null
+(**************************************************************************)
+(* ___ *)
+(* ||M|| *)
+(* ||A|| A project by Andrea Asperti *)
+(* ||T|| *)
+(* ||I|| Developers: *)
+(* ||T|| The HELM team. *)
+(* ||A|| http://helm.cs.unibo.it *)
+(* \ / *)
+(* \ / This file is distributed under the terms of the *)
+(* v GNU General Public License Version 2 *)
+(* *)
+(**************************************************************************)
+
+
+
+include "logic/connectives.ma".
+
+theorem stupid:
+ \forall a,b,c:Prop.
+ (a \land c \lor b \land c) \to (c \land (b \lor a)).
+ intros.decompose.split.assumption.right.assumption.
+ split.assumption.left.assumption.qed.
+
+definition MyFalse \def False.
+
+theorem ex_falso_quodlibet: \forall (P:Prop). MyFalse \to P.
+ intros. decompose.
+qed.