Precisely. Though it is my theory that the dopplegangers would not be exactly the same as we are. While there is only a finite number of ways chromosomes and genes replicate, there are nearly infinite possibilities as to what goes into a universe as well as into a person's life. While we may have gone right, they may have gone left. And if they are from a different culture than we are, it also leads into the fact that they will be very different. So I believe this may be a case of doppleganger only in appearance, not a complete doppleganger. Though there is most likely dopplegangers out there that are exact copies of ourselves.