  A new model is proposed for the purpose of modelling the ``wave function
collapse'' of a two-state quantum system. The collapse to a classical state is
driven by a nonlinear evolution equation with an extreme sensitivity to
absolute phase. It is hypothesized that the phase, or part of it, is displaying
chaotic behaviour. This chaotic behaviour can then be responsible for the
apparent indeterminacy we are experiencing for a single quantum system. Through
this randomness, the statistical ``ensemble'' behaviour, due to Born, to
describe a single quantum system, is no longer needed.
