### Big Bang argument

Wolfram and others suggest a properly crafted cellular automaton could replicate the known mechanics of the universe — gravitational, electro-magnetic, strong, and weak forces — and provide a basis for a unified theory.

If the models start from a seed condition, then they also model a Big Bang which raises interesting questions:

- The grid
- What is the grid before the automaton runs?
- Where does the grid come from?
- What type of grid
- Shapes of the cells?
- What kind of information is embedded in the choice of grid/cell geometry?
- Cells
- What is the state of the cells before the automaton runs?
- What is the state of the "passive" cell?
- Rules
- How many rules are required?
- What is the size of the neighborhood?
- Leading to:
- How many possible universes?
- Are these other universes valid, or just artifacts of the one model?