IQ is yet another thing I class under "stuff Leftists ignore because it hurts their belief systems, but only sometimes." For example: Dumb White hillbillies = haha, stupid inbreeding retards. Dumb black hoodlums = omg raciss, shut up. They want to believe that IQ is a valuable measure for intelligence, but refuse to use it because it so terribly damages everything else they preach, and even the consequences of using it hypocritically anyway are still too dangerous for them.