Although B3LYP data are not provided in Fig. , that functional's MAE for this data set is 13.3 eV, which is slightly larger than that for B(30)LYP and thus consistent with the trend (as a function of α) that is evident in Fig. . The MAE decreases to 2.0 eV for B(60)LYP. A slightly smaller MAE of 0.7 eV was reported by Besley et al. for K-edge transitions, using a functional with 58% exact exchange applied to a different data set. We regard this as comparable to the present results, given the scale of the errors (as a function of α) that is documented in Fig. . The short-range correction (SRC) functionals that were introduced in Ref. 62, in order to improve on these results, employ 50% (SRC1) and 55% (SRC2) exact exchange at the shortest length scale ( 1 Å) in a tripartite range separation scheme, which reduces the MAEs to 0.3-0.6 eV. These observations from Ref. 62 suggest that 50-60% exact exchange works very well for coreto-valence excitation energies, which is indeed what we observe in Fig. .