diff --git a/Response_Letter/Response_Letter.tex b/Response_Letter/Response_Letter.tex
index b04c18d..78e914d 100644
--- a/Response_Letter/Response_Letter.tex
+++ b/Response_Letter/Response_Letter.tex
@@ -104,7 +104,12 @@ $n^w(r)$ [see Eqs. (5) and (11)] and the notation will be carefully modified acc
 	The important idea is that the linearity must be in the ensemble energy but the main constraint on the xc-functional should be that it is weight-dependant.
 	We emphasize that only the exact ensemble-xc-functional would have the ideal weight-dependency that would make the corresponding ensemble energy reproduce perfectly the linear behavior of the exact ensemble energy and lead to weight-independant excitation energies, that is exact excitation energies.
 	The use of an approximate weight-dependant xc-functional could reduce the ensemble energy curvature and give less weight-dependant excitation energies but it is reasonable to admit that it also could make things worse it the weight-dependency of the functional is poorly chosen.
-	That is why the construction of "good" weight-dependant xc-functionals is a really challenging matter in eDFT.}	
+	That is why the construction of "good" weight-dependant
+xc-functionals is a really challenging matter in eDFT.\\
+As a final comment, we insist after Eq. (28) on the fact that, in the
+exact theory, the xc ensemble density functional has no reason to vary (for a fixed density $n$)
+linearly with the ensemble weights. We refer to Ref. 92 where exact
+expressions for the individual xc energies are derived.}	
 	
 \end{enumerate}