Local realistic theory specific

This nonlocality and lack of realism inherent in quantum mechanics has inspired many attempts through the years to explain the results in terms of a theory that is both local and realistic. Without a specific local realistic theory it is, of course, not possible to predict a value for (a, b) to compare with the quantum mechanical value qm(<>> b) in Eq. (14). However, in 1964 J. S. Bell showed for the first time that such theories place constraints on (o, b), or rather combinations of (a, b), for different values of a and b. 

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