I am not going to argue that living that long is anything but the tail end of a huge bell curve. My point is simply there is no need to extrapolate when there are some actual numbers to work with. And when you look at the numbers you find that just like IQ the bell curve for lifespan is a little fatter at the tip than you might expect. At the same time there is a dip in rates of deaths ~10 so you are more likely to die at 1 than 21.
