The eminent MIT professor, author most recently of Alone, Together, discusses her darkening view of our digitizing world, her sense of the culture of MIT and its students, and her own career with Communications Forum Director David Thorburn, a longtime colleague.   Sherry Turkle is Abby Rockefeller Mauzé Professor of the Social Studies of Science and Technology in the Program in Science, Technology, and Society at MIT and the founder (2001) and current director of the MIT Initiative on Technology and Self. David Thorburn is Professor of Literature at MIT and director of the Communications Forum. Co-sponsor: Technology and Culture Forum at MIT