does everyone really have a doppelganger somewhere in the world or is that just a myth?

Question: does everyone really have a doppelganger somewhere in the world or is that just a myth?
- Keywords:
  appearance,
  doppel ganger,
  myth
Asked by ilovejoy to Claire, Kate, Matt, Rob, Sam on 21 Jun 2013.
- Sam Geen answered on 21 Jun 2013:
  
  I think that’s just a myth. But you do get lookalikes – people who randomly look very similar. Plus you have identical twins. But everyone is different, and our experiences make us behave differently and think differently, too.

Question: does everyone really have a doppelganger somewhere in the world or is that just a myth?