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(* as published by the Free Software Foundation; either version 2.1   *)
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(* GNU General Public License for more details.                       *)
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(* 02110-1301 USA                                                     *)

Theorem fresh_before_subs_name :
forall (p q : PP) (x : VV) (n : name),
freshname p (subs_var_name n (pname q) x) -> freshname p n.