A question for the professionals
Is there consensus among professionals who is a professional?
In my quest to gain blackjack knowledge I have come across varied internet forum archives that question the professionalism of many well known blackjack personalities. Among them are Don Schleisinger, Fred Renzey, Ian Anderson, Hollywood Dave Stann, Bootlegger, Arnold Snyder, Norm Wattenberger,and even Ken Smith. There are also lots of threads about Blackjack HOF members Kieth Taft and Laurence Revere.
As a complete amatuer I am certainly not going to disregard any information, or throw away any books, or software I have by Schleisinger, Renzey, Snyder and anybody else who is questioned online. Anybody can call themselves a professional at anything that doesn't mean we have to believe them. In something like blackjack it is worse because there isn't an official degree or league you can join that certifies you as a professional.