B A in A's reality, B in A's reality, A in B's reality in ....

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Do we produce an infinite number of realities this way?
I read somewhere in Quanta magazine that (if I understood correctly):

When A and B watch C, then C in A's reality may be different than C in B's reality (as B is seen by A?)

What if A and B watch each other? We could make chain: A in A's reality, B in A's reality, A in B's reality in A's reality, B in A's reality in B's reality in A's reality, ...

So do we this way obtain an infinite set of different realities?
 
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porton said:
So do we this way obtain an infinite set of different realities?
No, but we do obtain a powerful argument against trying to understand quantum mechanics by reading Quanta magazine.

And kidding aside... you’re describing a variation of an old paradox called “Wigner’s Friend”. Google will find much more about this class of problems.
 
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