 If Biden is his conditions worsened and he comes out at 630 and he doesn't look younger, doesn't look better, doesn't look sharper. And if he comes across as angry because the questions are not what he wants to hear, it's over. If he screws up the the flow of anything, if he screws up the name of a world leader, if he screws up who he's talking to, if he can't remember an answer before he's done or if he just fumbles and mumbles.