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Both groups are "real". As real as you can get in a game played by eternal beings.
I was trying to comment that I have caused mandela effects with my own actions.
They aren't as uncommon as people would like to believe / the past is not as static and ubiquitous as people would like to believe.

Two people usually have different memories of an event. And it isn't just what they were focusing on, but you can find discrepancies in interactions that they witnessed.

I don't believe that to be true. All great books talk of 144,000 real souls. Even the bible.

You could be correct. I know many people who are in more than one place at this time.