They all agree that D is really the best node, it's better than E, but E is definitely better than F. That is maybe every single node on the left hand side has the rank listed D, followed by E, followed by F. By contrast, maybe there's heterogeneous preferences amongst vertices in capital V. Maybe D thinks a is better than B is better than C. While E prefers B to C to A. And finally, F prefers C to A to B. So what might these nodes and these ranked lists represent? 