  Entangled EPR spin pairs can be treated using the statistical ensemble
interpretation of quantum mechanics. As such the singlet state results from an
ensemble of spin pairs each with its own specific axis of quantization. This
axis acts like a quantum mechanical hidden variable. If the spins lose
coherence they disentangle into a mixed state that contains classical
correlations. In this paper an infinitesimal phase decoherence is introduced to
the singlet state in order to reveal more clearly some of the correlations. It
is shown that a singlet state has no classical correlations.
