What is a prospect ranking? It's obviously just for entertainment and discussion purposes at the fan level, but prospect evaluation matters a lot for the actual organizations. So while, as fans, we are limited in many respects, I don't think it's correct to say that there is no right answer. When MLB organizations make decisions involving young players, they are providing answers. If they are consistently valuing prospects in a certain way, I think we need to start there as a guide for how prospects should be ranked. Would the Twins more quickly trade away Vargas or Thorpe? I don't think there is any question at all that they would sooner trade Vargas. Nor do I think there is any question of which player the other 29 organizations would pick if they had the choice. And this isn't idle speculation, because we can look at trade histories and see that young, high-upside prospects bring a better return than more advanced, but lower-ceiling prospects. Opinions will always vary with respect to particular players, but I strongly disagree with the idea that prospect comparisons are completely subjective.