So: entropy, as far as we can tell. See the works of Dewar, referenced here. Or for a popular version, try: Whitfield, John Survival of the Likeliest? for a popular version from someone other than me.
So: entropy, as far as we can tell. See the works of Dewar, referenced here. Or for a popular version, try: Whitfield, John Survival of the Likeliest? for a popular version from someone other than me.