Who amongst us are cardiologists? If a cardiologist says it's possible to hack into a defibrillator then it's possible. Might we get confirmation of this from other cardiologists? Possible. You can't even ask "Is it possible..." in court because anything is possible. You have to ask a more reasonable question, "Is it likely/plausible..."

So, cardiologists, is it plausible that a terrorist could hack into a vice president's defibrillator and kill him? Give us some plausible scenarios. Cheney's doctor mentioned rope lines, rooms next door and somebody downstairs. Plausible? Reasonable? Assess for us the comparative risk to, say, a terrorist in the room next door with a powerful magnet and the steel plate in Cheney's head.