William wrote:
> Hello everybody,
>
> My name is William Vandenberghe, I'm 21 years old, and currently a last
> year student electrical engineering at the university of Leuven
> (Belgium).
>
> All of my life, I have been wondering about why we exist, and why we
> exist in the way we do... I think I finally found the explanation and
> after some searching on the internet, I came to the theory of Max
> Tegmark http://space.mit.edu/home/tegmark/multiverse.html which was
> pretty close to what I was thinking.
>
> Although, I do disagree or put the emphasis differently at some points.
>
> My theory (I mailed a copy to professor Tegmark yesterday) :
> The main disagreement in philosophy with the theory of Tegmark is that
> I do believe that SASs are possible in universes that have higher
> dimensions, or for instance SASs in a universe that did not just start
> with 1 big bang ...
They are possible in universes much smaller than ours,
too. The Anthropic Principle doesn't tell us that much.
> Take a universe completely the same to our universe up to this moment,
> obviously it would contain an SAS (us humans); but the difference with
> our universe is that from tomorrow on, it will stop obeying the rules
> of physics (it has respected rules of physics up to today for those
> humans, but no longer does from tomorrow on). I am sure you will agree
> that this universe exists (given that I can describe it to you and it
> is not inconsistent).
>
> Now, if all universes are equally probable, we can not be living in a
> universe with rules of physics.
>
> My solution:
> In short, I think the option 1a
> "Everything that exists mathematically exists physically."
> must be true ... for reasons of symmetry, simulated reality, etc ...
And "nothing unmathematical exists" ?
> Now, I have a 2nd "postulate":
> "Nothing that exists mathematically exists physically with finite
> probability."
>
> So the main point in my theory is, that all mathematical things exist,
> but some with a different probability than others. And the way I
> develloped my theory, the probability of a universe (or a formal system
> in the paper of prof. Tegmark) to exist; is proporional to the amount
> of information that universe contains ( Probability ~ 1/(amount of
> information) )
>
> A simple example would be:
> A (normalized & continious) 3D universe with 1 particle in it is
> infinitely less probable than a (norm. & cont.) 2D universe with 1
> particle in it.
> This is very intuitive, it just means that a 2D universe is equally
> probable as the sum of the probability of all 3D universes for 2
> coordinates fixed, and a 3rd varied.
> Or P( U2(a,b) ) = int( P( U3(a,b,x) ) , x=-inf..inf )
>
> So of all universes that allow SAS, we live in the one with the lowest
> possible amount of information.
But we don't. Galaxies other than our own are overkill.
> Now let us look at some predictions for now:
> - Our universe has rules and keeps to them at all times unless it is
> essential for the existence of a SAS (violating rules = information)
> - Either our universe started with a small number of particles, or many
> particles in our universe started with the same initial conditions; if
> every particle currently in existence, had its own initial conditions,
> this would contain a huge amount of information. A nice Big Bang
> directly coming out of the TOE.
> - No universe containing fewer information than our own, contains a
> SAS.
>
> Another amusing result is that we can answer the simulated reality
> question with a simple "no, we are not living in a simulation", since
> it takes a universe of more information to simulate our universe and
> that universe is at least infinitely (probably some powers of infinity)
> less probable than ours.
>
> Bring on the comments please :)
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Received on Sun Dec 10 2006 - 10:20:10 PST