On 21 Apr 2013, at 19:45, Craig Weinberg wrote:



On Sunday, April 21, 2013 9:20:21 AM UTC-4, Bruno Marchal wrote:

On 20 Apr 2013, at 23:23, Craig Weinberg wrote:



But what makes the laws of physics turn into physics? What makes physics follow the laws?

Study UDA. It answers this precisely. Observability is lawful. I gave the axioms, and shows them being theorem of arithmetic, once comp is at the metatlevel.

It's not enough that observability is lawful,

Indeed.



physical enactments must be identified as a pure consequence of law - which it can't be.

No it is too.




All laws of geometry can be simulated computationally without generating any physical lines, points, or shapes.


No need to generate them.




When does UDA generate geometry, why should it ever do that, and how does it accomplish it?

It is explained in sane2004, and that is the object of many posts here.






What would be the point of physics if this realm of Comp already exists?

It exists, like the prime number exists. What is the point of prime numbers? Not sure such question makes sense, but who knows.

Prime numbers exist if you understand what you are looking for.

It exists even if you don't understand them. It is like the taxes.



So do words ending in the word 's'. There is a huge difference, however, in questioning the meaning of a pattern within a symbol system, and a completely arbitrary attachment of all of the physical phenomena in the universe to an abstract system. What Comp really does is push dualism halfway under the carpet, leaving only mind exposed and claiming body as an epiphenomena.

A body cannot be an epiphenomenon. That's does not make any sense. But comp makes it into an epinoumenon, like ether, phlogiston, and other superstition.




The question remains though, if all bodies can be simulated,

With comp bodies cannot be emulated by Turing machine. They can be simulated at some substitution level on which yopu might bet. careful, it is a very important nuance to grasp if you want to understand why machine believes in some correct local way to matter and physical laws.



then why have bodies at all?

To talk and manifest our consciousness relatively to other persons.




If anything can be simulated as a number relation, then what's with all of the shapes and textures?

This is what is explained by computer science. Machines cannot avoid them. It follows from addition and multiplication, like the prime numbers.

Bruno



http://iridia.ulb.ac.be/~marchal/



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