On Nmania I think I saw a post where someone said they went to a diversity class at his workplace (it was mandatory) and the black instructor pointed to two pictures. One of them was a diverse group of people, like a white guy in a wheelchair, a Mexican man, a white woman, and an Asian. The other picture was a group of blacks. The instructor asked which one was diverse, and they picked the first one. She said wrong, the more diverse group is the group of blacks.