In response to the word "integration" being thrown around, Grover, the boy genius, offers the calculus definition. Later it is realized that the parents were discussing the other meaning for "integration", white and black kids in the same schools, was what was really meant. Carl's family, who is Negro, is a sort of trigger for the gentrification of the area, an easy target, an explanation for the racist remarks made by Tim's mother and reflected around the neighborhood, and gives light to the mockery of Hogan's dispatch to Mr. McAfee's aid.