The Law of Nature

There are all sorts of generalizations that simply happen to be true, but don't seem to have the status of law. For example, it's probably a truth about this room now that all the pens in it are more than three feet above the ground. Imagine that throughout the whole history of the human race, including the future as well as the past, the oldest that anyone ever lives is to the day before their 125th birthday. So that's a true generalization, not just about the past, but throughout all of time.