Re: Fundamental problems in Physics

[Tim Gwinn <***>]

Howard,

HP:
> I meant that Rosen's meaning of "model" requires conforming with
> the causal
> structure of the system, whereas his "simulation" requires only
> conforming
> with the observables. Is that your interpretation?

TG: On the model part of your statement, I would use the term "congruency"
rather than "conforming", but otherwise I agree.  As to simulations, I'd say
it requires only the correspondence of behavior of the simulation with
correspondence of behavior of the natural system, but I think that's what
you are saying, so we agree there. That puts us back to the original Rosen
modelling relation, as far as I can see.

Regards,
Tim