Keith Devlin is executive director of the Center for the Study of Language and Information and a consulting professor in the Department of Mathematics at Stanford University. He also cofounded and serves as executive director of the Stanford Media X Research Network. His books include The Math Instinct: The Amazing Mathematical Abilities of Animals and All of Us, forthcoming from Avalon Publishing; Sets, Functions and Logic (3d ed., Chapman and Hall, 2003); The Millennium Problems: The Seven Greatest Unsolved Mathematical Puzzles of Our Time (Basic Books, 2002), reviewed in the March-April 2003 issue; The Math Gene: How Mathematical Thinking Evolved and Why Numbers Are Like Gossip (Basic Books, 2000), reviewed in the November-December 2000 issue; and Goodbye Descartes: The End of Logic and the Search for a New Cosmology of the Mind (John Wiley, 1997).