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In this regard it may be worth mentioning that Pitowski himself is a philosopher of science. 2 The Bell Effect There are by now known a variety of ways which describe the phenomenon brought to light for the first time by Bell’s inequalities. In order to avoid complicating the issues involved, we shall present here one of the most simple such ways, Maudlin. This phenomenon, which one can call the Bell effect is a contradiction resulting between Quantum Mechanics, and on the other hand, what can be done in a classical setup which satisfies the principle of locality.

Indeed, the two participants could be asked different questions, and each of them would only reply according to the question asked, and according to their joint strategy, which they happened to use at the moment. 5) is classical, that is, it is not specifically quantum mechanical, is obvious. 2, Cushing & McMullin. Namely, each of the particles can only be subjected to two different experiments, and as before, each such experiment can only give one of two results. In view of the specific quantum mechanical setup considered, the experiments to which the two particles are subjected can be identified with certain angles in [0, 2π] which define the directions along which quantum spins are measured.

CD ). We consider now the D × D block diagonal matrix   A1,2 =     c¯1 /c1,2 −c2 /c1,2 c¯2 /c1,2 c1 /c1,2    I3,  . . ,D   where c1,2 = (|c1 |2 + |c2 |2 )1/2 , while I3, . . ,D is the (D − 2) × (D − 2) identity matrix. Obviously A1,2 is unitary, and it operates on C D only on the two dimensional subspace corresponding to the first two coordinates in 38 E E Rosinger the given basis, and maps | ψ1 > into a vector with coordinates (c1,2 , 0, c3 , . . , cD ). Applying further the similar matrices A1,3 , .

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