PFF uses the same three people to observe every down BEFORE they run their metrics. The data I have access to utilizes over a dozen people who are trained to professionally observe football players and their abilities. It's not that I don't trust the mathematics involved at getting their results, I don't trust their ability to OBSERVE as keenly as what I would trust a dozen professional scouts. Like I said a million times before in threads like these, if the source data lacks validity, as I posit PFF does in comparison to data derived by professional scouts, then your results will lack validity. I believe that is the "transitive property" of logic.
Nothing anyone says here is going to make me change my mind about this. Especially when PFF gives you crap like this:
To me, the guy doing the FBG Ratings, scouting data from professional scouts in an actual NFL front office > PFF. That's my opinion and I will not deviate from that. You can take that one to the bank.


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