To summarize, our results demonstrate that the extrapolated GTO energies are always closer to PW reference values when the CP correction is used to tackle the BSSE with sets that are augmented by diffuse functions (Table ). For nonaugmented bases, the interplay between the BSIE and some residual BSSE can make the Helgaker and Martin4 two-point extrapolations perform fortuitously better in conjunction with the half-CP correction. The empirical Peterson scheme surprisingly provides interaction energies that are very close to the PW results, comparable to Helgaker or Martin4, but the latter two appear to be more robust candidates because of their theoretical foundations and the fact that they depend on two parameters only. To confirm this, the same analysis has been carried out with omission of four outlier systems (the two uracil, benzene-water and T-shaped indole benzene dimers for which the aug-cc-pV5Z/CP interaction energies . The legend is given in Fig. . Signed deviations are also provided in Fig. .