Ultimately, the discussion seems to center largely on the two questions that were the focal point of my columns five years ago:
* Can we boil a basketball player's value down to a single number?
* What better describes a player's value: his individual statistics or plus-minus data describing his impact on the team?
If you would have told me five years ago that neither question would yet be answered to anyone's satisfaction, I would have been disappointed and somewhat surprised. What happened?