A single unique representative VPG network. (a) Shown as a dashed line the VPG assigns a pebble capacity to each fluctuating edge equal to its average number of bars present. (b) An exhaustive set of possible PG realizations. In each realization, the fluctuating edge is either missing (no line) or is present (solid line). Missing and quenched edges are shared commonly between the VPG and each PG realization.