Thank you for the first reasonable reply I've received throughout this thread. You've caught the gist of part of what I'm hoping to illuminate here (which is probably far more important in the larger scheme of things), but you haven't seen the full picture yet. I have a challenge for you. Using your own line of reasoning as a premise to be challenged, can you analyze it from an adversarial perspective and develop a proposal for how additional inferences might be made regarding unique identification of medallions in the event that each medallion has been replaced with an arbitrary token? In your deliberations, please consider every facet of the reported data. It's quite apparent that those who have replied to my comments in this thread either (1) haven't directly considered the data themselves, or (2) lack the insight required to observe relationships between apparently unrelated constructs.
In short, under this challenge, I can deliver ~90% of the medallion identifiers using no external information other than full knowledge of the means by which the original medallions are assigned. Given a tiny parcel of additional correlation, I can hit 100%.
I look forward to your reply. By the way, what do you do for a living at the moment?