(* Contribution to the Coq Library   V6.3 (July 1999)                    *)
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(* This contribution was updated for Coq V5.10 by the COQ workgroup.        *)
(* January 1995                                                             *)
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(*                                ex1_auto.v                                *)
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auto.
Qed.
intros A B H'; elim H'; auto.
Qed.
intros A B H'; elim H'; auto.
Qed.
auto.
Qed.
auto.
Qed.

Theorem Praeclarum :
forall x y z t : Prop, (x -> z) /\ (y -> t) -> x /\ y -> z /\ t.