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by abetusk 1801 days ago
|X(0) - X(a)| = 2, not 1 and X(a) != Y(a)

The subtler issue is that it's a counterfactual question. What would have happened if I had measured or been able to measure all three angles 0, a, 2a? In this case the bit string is the same except for the 1% difference. In other words, X(t) = Y(t), for all t.

The argument is essentially trying to construct a "hidden variable" model and showing that it can't work.