hhm. before i give you the answer, i'll remind you what harry truman once said. if you want a friend in washington, get a dog. [laughter] the krauthammers have improved on that. we have two dogs in case one turns on us. [laughter] so the correct answer is maggie and willie, but i'm not sure which one it really is. >> so we actually have a microphone over there. right, cindy? and there's one over here. i don't know why i can't see these. so if you have a question, go to the microphone, how's that? >> a very -- >> so, charles, explain the razor. >> it's the principle in science by which when faced with a choice of explanations for any natural phenomenon, you always choose the simplest on the assumption that nature's cunning, and nature is very concise. and parsimonious. so if you have a very elaborate explanation for evolution or you have a very clean one like darwin, you would accept the more precise and concise one on the assumption finish it isn't always true, but it is a rule of thumb that always prevails, almost always prevails. einstein, for example, was able