The Complexity of the Multiverse

In quantum physics no discontinuous change is necessary even though all measurable quantities are discrete it works as follows. For example if a variable has only two possible values say zero and one how does it ever get from zero to one? In classical physics it would have to jump discontinuously which is incompatible with how forces and motion work in classical mechanics. David says let us start by imagining some parallel universes stacked like a pack of cards with the pack as a whole representing the multiverse such a model greatly understates the complexity of the multiverse.