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(* modify it under the terms of the GNU Lesser General Public License *)
(* as published by the Free Software Foundation; either version 2.1   *)
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(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the      *)
(* GNU General Public License for more details.                       *)
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(* 02110-1301 USA                                                     *)
Require Export DistributedReferenceCounting.machine1.machine.
Require Export DistributedReferenceCounting.machine1.cardinal.
Require Export DistributedReferenceCounting.machine1.comm.
Unset Standard Proposition Elimination Names.
Section MESSAGE.

Lemma not_s1_s2 : forall s s1 s2 : Site, s1 <> s2 -> s1 <> s \/ s2 <> s.