> the existence of many valid models and simple mappings between them implies a 'deeper model' at play Not necessarily. You can have completely different formu

> the existence of many valid models and simple mappings between them implies a 'deeper model' at play Not necessarily. You can have completely different formulations of the same physics. Lagrangian, Hamiltonian, and Newtonian dynamics are different models of classical motion. Does that imply there's a "deeper model" of classical motion? I wouldn't say so.