Hour 1: Where do you turn today when you really want to know the facts? We’ll discuss the changing nature of knowledge this hour with David Weinberger, Senior Researcher at Harvard University’s Berkman Center for the Internet & Society. His new book is “Too Big to Know: Rethinking Knowledge Now That the Facts Aren’t the Facts, Experts Are Everywhere, and the Smartest Person in the Room Is the Room” (Basic Books, 2012).