Abstract
Quantum mechanically for the Bohm-Aharonov system of two spin-1/2 particles in a singlet state the polarisation correlation parameter is P(a, b) mod QM=( sigma 1.a sigma 2.b)=-a.b. For a class of hidden variable theories, including those with P(a, a)=-1, the authors formulate the Einstein-Bell locality condition and obtains a generalisation of Bell's inequality.