I don't remember the full extent of the conversation, but PG is white, but not Caucasian is what we established. He enjoys all the benefits of white privilege without white guilt. Also, he's allowed to breed with only other whites but not Caucasians because of superiority. Lastly, Caucasian = white but white =/= caucasian in the same manner that a square = rectangle but rectangle =/= squares. You see? So he's white.