Is it true that somewhere in the universe, there is someone exactly the same as us?

Question: Is it true that somewhere in the universe, there is someone exactly the same as us?
- Keywords:
  dimensions,
  parallel universe,
  physics
Asked by helloimholly to Nick on 12 Mar 2014.
- Nick Goldman answered on 12 Mar 2014:
  
  No, I don’t believe it is. Everyone is different — even so-called identical twins have lots of differences. We’re beginning to understand the genetics and biology that explains this, and it shows us that no 2 people will ever turn out the same.

Question: Is it true that somewhere in the universe, there is someone exactly the same as us?