 Fred Kronz (1998, 2000) has argued that focusing on the separable/nonseparable Hamiltonian distinction is more appropriate than nonlinearity for the question of quantum chaos (1.2.7 Taking Stock above). Although Schrödinger’s equation is linear, there are many examples of nonseparable Hamiltonians in quantum mechanics. A prime example would be the Hamiltonian describing an interaction between a measurement device and a quantum system. In such situations, the quantum system-measurement apparatus compound system can evolve from a tensor product state to a nonseparable entangled state represented by an irreducible superposition of tensor product states. A second ubiquitous example would be the famous Einstein-Podolsky-Rosen correlations. Although many, such as Robert Hilborn (1994, 549–569), have argued that the unitary evolution of quantum systems makes SDIC impossible for quantum mechanics, these arguments do not take into account that interacting quantum systems typically have nonseparable Hamiltonians. 