where x i is the deviation of a TD-DHDF's D e or r e from that of the SCS-CC2/CBS reference. MADs are discussed as a summary of each functional's performance rather than used as a formal summary statistic as four data points is not appropriately representative of a larger trend. MADs for the 22 tested functionals both without and with DFT-D3(BJ) dispersion correction are presented in Figure , and the associated values as well as those with DFT-D4 in Table . While absolute deviations are discussed, the tendency for functionals to over-or underbind the excimers will be discussed qualitatively where relevant.