  We investigate the possibility of simulating partially entangled two qubit
states by separable states of higher spins. First, we show that all partially
entangled isotropic states can be simulated classically. We further investigate
partially entangled pure states, and their binary mixtures and find that these
systems forbid such a simulation, signifying that separability does not have a
universal character in determining the inherent quantum nature of a state.
