Deviations from Nernst-Einstein transport are conventionally rationalized in terms of ion pairing. A charge-neutral ion pair will diffuse, but it will not migrate under an electric field; it will thus contribute to the Nernst-Einstein conductivity but not the actual conductivity, lowering the ionicity. As such, the ionicity is frequently used as a direct measure for the degree of ion dissociation in experimental studies. Based on this intuition and our observed decrease in ionicity as the degree of confinement increases, we might expect more ion pairing in the most confined electrolytes. However, we observe the opposite trend: the most confined electrolyte has a lower degree of ion pairing (Fig. ), a phenomenon explored in our prior work. This poor agreement between the trends in ionicity and the fraction of associated ions has been observed in numerous other systems, from superconcentrated electrolytes to polymer-based electrolytes. In fact, it is becoming increasingly recognized that a purely static analysis of ion pairing is insufficient to capture dynamic ion correlations. Several studies have found that a dynamic measure of ion pairing, as quantified by the average lifetime of an ion pair or the ion pair diffusion length L Na-Cl , correlates much more strongly with the ionicity. The ion pair diffusion lengths for the nanoconfined electrolytes studied here are plotted in Fig. ; L Na-Cl increases as the slit height decreases, suggesting that the steric constraints imposed by the graphene sheets increase the free energy barrier for an ion pair to break apart. For slits with two or more layers, we indeed observe that the increasing L Na-Cl trend as the slit height decreases closely parallels the trend in decreasing ionicity. Thus, while the number of ion pairs remains relatively constant across these systems, each ion pair diffuses together for a longer distance, yielding more correlated cation-anion motion (L +-) and lower ionicity. In the monolayer electrolyte, however, we hypothesize that the ion pairing fraction and L Na-Cl both contribute to the ionicity: the simultaneous increase in diffusion length and decrease in the fraction of ion pairs collectively give rise to a very small change in ionicity relative to the bilayer system.