added important comment

diff --git a/helm/software/components/tactics/paramodulation/equality.ml b/helm/software/components/tactics/paramodulation/equality.ml
index 57c440860a78dc3016ba1b3c11917861d9b13a5b..5f847bcb5ec6a0affae13d1883ec667e6e03087f 100644 (file)
--- a/helm/software/components/tactics/paramodulation/equality.ml
+++ b/helm/software/components/tactics/paramodulation/equality.ml
@@ -502,6 +502,9 @@ let pp_proof names goalproof proof =
 let get_duplicate_step_in_wfo l p =
   let ol = List.rev l in
   let h = Hashtbl.create 13 in
+  (* NOTE: here the n parameter is an approximation of the dependency 
+     between equations. To do things seriously we should maintain a 
+     dependency graph. This approximation is not perfect. *)
   let add i n = 
     let p,_,_ = proof_of_id i in 
     match p with