A. Wolf wrote: >> Does "model" imply a theory which predicts the evolution of states >> (possibly probabilistic) so that the state of universe yesterday limits >> what might exist today? >> > > No. Model means a mathematical object. One specific, unchanging, > crystalline object you can hold in your hand and look at from a bird's-eye > view. > > >> So why the reference to "today" and "yesterday". >> > > Because those are parts of the object I'm referring to. I'm not looking at > a time-sequence of objects...I'm considering time and events and the many > universes that stem from it as part of the solitary object itself. > > >> So you're taking a block universe picture in which time is implicit some >> sequence of states. >> > > It's a static model that includes all that infinite branching. > > >> But I'm concerned about what defines "consistent". If it is just >> non-contradiction then any sequence of states seems to be as good as >> another. The mathematical consistency only applies within each state. >> > > That's not true at all! For example, something going faster than the speed > of light would be a contradiction in our current universe. But not a logical contradiction. It would just contradict our assumed model of physics, i.e. a nomological contradiction.

> Just because you > can envision something doesn't make it mathematically possible. > It does unless there are some axioms and rules of inference such that adding the thing I envision allows one to infer a contradiction. That's why I was asking about the model - does it have axioms and rules of inference? Brent > Math is full of contradiction...it's how we prove nearly all mathematical > results. Contradictions are those things we know to be false > (non-existent). From a physicist's perspective, the universe is a > mathematical object. If you need examples of mathematical contradiction I > would be happy to supply them. > > Anna > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Everything List" group. To post to this group, send email to [EMAIL PROTECTED] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/everything-list?hl=en -~----------~----~----~----~------~----~------~--~---