Lending a Hand: Sign Languages and the DeafComplex and highly sophisticated, sign languages have proved excellent tools for analyzing the foundation of human language capability. In this program, Dr. Jonathan Miller weaves together the history of sign languages for the Deaf with insights into the natural synergy between language, vision, and dexterity to support his conviction that there is a common mental structure underlying all languages, regardless of their outward expression. Along the way, Dr. Miller skewers a number of enduring misconceptions—for example, that sign languages are purely iconic and therefore incapable of conveying abstract ideas. (47 minutes)