Columbia University professor of psychology, Dr. Herbert Terrace, talks with Studs regarding his 1979 book "Nim: A Chimpanzee Who Learned Sign Language," animal cognition and the evolution of language.

Ellen Afterman, Clinton Sanders and Spellman Young discuss the exclusionary power of language; i.e. white, middle-class language as the standard by which people are intellectually and socially judged, and how groups are using language to define identity.