 The failure of supervenience arises in other cases. Consider the possibility that there is a lone particle traveling through otherwise empty space at a constant velocity of, say, one meter per second. It seems that this might just be a nearly empty Newtonian universe in which it is accidentally true that all bodies have a velocity of one meter per second; it just so happens that there is nothing to alter the particle’s motion. But, it might also be the case that this world is not Newtonian and that it is a law that all bodies have velocity at one meter per second; it could be that this generalization is not accidental and would have held true even if there were other bodies slamming into the lone particle. (Earman 1986, 100; Lange 2000, 85–90.)