A third and I pray final post on Rudy Giuliani's prostate.  David Gratzer, the doctor who provided Giuliani with his disputed numbers on cancer survival rates in the US and Britain--numbers which provoked an assault from Paul Krugman and others, and a characteristically calm and judicious response from this desk--has posted his reply at City Journal (an excellent publication, by the way). He's not backing down, which I think is a mistake. Nothing he says makes me wish to revise my posts one and two.