Off the Page - 16/12/2010

"I don't know" - three little words so hard to say nowadays. Doubt and uncertainty are out, confident assertions are in. Opinions, even received ones, are the order of the day. The temptation is always to bluff our way with some kind of response, however little we know about the subject in hand. Phil Hammond is a doctor and Kathy Sykes is a science professor. John Harris is a journalist whose job is to express opinions. Are they able simply to admit: "I don't know"? Dominic Arkwright presides over new writing and straight-to-the-point discussion. Producer Beth O'Dea.