Commit 7479b01b authored by Jacques-Henri Jourdan's avatar Jacques-Henri Jourdan

Add comment.

parent f3033b7d
......@@ -524,6 +524,8 @@ Proof.
Qed.
(** * Pure *)
(* This relies on the invariant that [FromPure false] implies
[FromPure true] *)
Lemma tac_pure_intro Δ Q φ af :
env_spatial_is_nil Δ = af FromPure af Q φ φ envs_entails Δ Q.
Proof.
......
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