the thing you have in common with henry marsh is that you've both written books in where you're frankgree to which sometime you and others make mistakes, sometimes you feel that you let patients down. do we really want to know all this? well, perhaps i should ask you that. laughter. well, good hardtalk question. my guess is that sometimes we'd rather not know, for example, the degree to which chance is relevant in any serious intervention that you make. i think that is true but i think that in heart surgery, at least, we are extremely honest about the downside. we give patients risks, calculated properly, scientifically, as percentages, we tell them likelihood of death, likelihood of stroke, likelihood of not getting a good outcome, and we tell them the benefits and we ask them to weigh these things, so at least we are being honest. and i think, nowadays, patients no longer accept the patriarchal approach of, "well, you know, there you are, my good man. i know what's best for you." and that's not good enough. i certainly wouldn't want to be treated like that as a patient. i want to ma