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It is said lambda could be any parameter.

I would like to interprete lambda and thought of two possibilities :

-$$\lambda=\phi $$ the angle of polarization of the photon arriving at A. This seems reasonable

-since lambda could be any parameter it could be : the coordinate of the universe in which result is A for the measurement setting given. Hence a many-worlds view.

Thus can we deduce from Bell theorem that if one wants to reproduce quantum results with MWI it should still use nonlocal formulas ? Hence MWI does not solve the nonlocality issue ?