Goal forall x : proc, x = alt Delta x.
intro.
elim A1.
apply A6.
Save A6'.
Section GUARDED.
Variable D : Set.
Variable d : D.
Variable x y : proc.
Variable z : D -> proc.
Variable a : act.
Variable B : bool.
Variable L : ehlist.

(* Specifications: *)
Axiom G2 : GRD (ia D a d).
Axiom G5 : (forall d : D, GRD (z d)) -> GRD (D + z).
Axiom G6 : GRD x -> GRD (seq x y).
Axiom G7 : GRD x -> GRD (Lmer x y).
Axiom G8 : GRD x -> GRD y -> GRD (alt x y).
Axiom G9 : GRD x -> GRD y -> GRD (mer x y).
Axiom G10 : GRD x -> GRD y -> GRD (comm x y).
Axiom G11 : GRD x -> GRD y -> GRD (cond x B y).
Axiom G12 : GRD x -> GRD (hide L x).
Axiom G13 : GRD x -> GRD (enc L x).
End GUARDED.