We take this to mean that although no spin-delocalized hemibond seems to exist for OH(aq) at the MP2 level (in any sense that Pauling would likely recognize as such), 1 any transient fluctuation into a pseudo-hemibonded HO • • • OH 2 geometry exhibits a 1b 2 (H 2 O) → 2p( OH) excitation consistent with the experimental UV spectrum of OH(aq), even for O * • • • O distances considerably larger than those typically associated with hemibonding. Shorter O * • • • O distances may be stabilized by SIE but this is not required to obtain the 1b 2 (H 2 O) → 2p( OH) charge-transfer transition. In hindsight, a significant fraction of the snapshots tagged as "non-hemibonded" (based on a spin-charge cutoff) in the spectral decomposition of Fig. could likely be categorized as pseudohemibonded.