Sure, I just mean that the line is a lot fuzzier than most of the other examples. Like if you showed me just the modern Polish map in the first one, I could cl

Sure, I just mean that the line is a lot fuzzier than most of the other examples. Like if you showed me just the modern Polish map in the first one, I could clearly draw a pretty accurate approximation of the historical German border. But I don't think you could get nearly as accurate of a historical Mexican border from the modern population map. And in few areas where you can, it's also a modern border (Texas-Louisiana for example). It's just a less compelling example than the others.