(* 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.v                                   *)
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intros A H'; exact H'.
Qed.

Theorem and_commutative : forall A B : Prop, A /\ B -> B /\ A.