Robson Pereira is a Pennsylvania-area instructor of Brazilian jiu-jitsu. He has made a number of contradictory claims about his lineage and training, some of which have been corroborated by prominent figures in BJJ: ninth-degree red belt Francisco Mansor, eighth-degree red-and-black belt and former world BJJ champion Rigan Machado and third-degree black belt Marcos Santos.

To find out the truth about these claims, read the full article here.