idream

Some people misuse the fact that dreams are not completely understood as a method to say that dreams may come from parallel universes. I am trying to win an argument with my friend concerning this topic and I need evidence that contradicts this statement. Though, the burden of proof argument comes into play, please don't comment that as it has already been stated. Surely there must be some logical rule that prevents dreams from occurring in parallel universes if you have an inkling please comment as it will be greatly appreciated.