Manu: saving work in the discussion (Fig. 3).

Manuscript/eDFT.tex

@@ -1324,7 +1324,8 @@ The reverse is observed for the second excitation energy.
 
 Figure \ref{fig:EvsL} reports the excitation energies (multiplied by $L^2$) for various methods and box sizes in the case of 5-boxium (\ie, $\nEl = 5$).
 Similar graphs are obtained for the other $\nEl$ values and they can be found in the {\SI} alongside the numerical data associated with each method.
-For small $L$, the single and double excitations can be labeled as ``pure''.
+For small $L$, the single and double excitations can be labeled as
+``pure'', \manu{as revealed by a detailed analysis of the FCI wavefunctions}.
 In other words, each excitation is dominated by a sole, well-defined reference Slater determinant.
 However, when the box gets larger (\ie, $L$ increases), there is a strong mixing between the different excitation degrees.
 In particular, the single and double excitations strongly mix, which makes their assignment as single or double excitations more discutable. \cite{Loos_2019}