This is not trigonometry, for goodness sakes, or at least it shouldn't be. This is not trying to figure out what in the heck Dennis Green is thinking up there in Minnesota. This is not like searching for a presidential candidate with personality.
Truth be told, it's probably much easier and much more formulaic than many people care to believe.
Still, as the people on the tournament selection committee will tell you, this whole process is hardly easy. Opinions come into play. Maybe politics, too. Some teams, maybe even some deserving ones, will be left out. And, so, comes the inevitable hurt.