quarta-feira, 30 de maio de 2012

Does the universe does computations?

I just revisited this page http://www.idsia.ch/~juergen/digitalphysics.html and the following reasoning raised.

Assume that the universe is a computer. Therefore, everything that happens is the result of some computation done naturally at all levels.

So, since you are reading this, are you going to continue reading this post on the next 3 seconds? Quite probably (I hope so), but something could happen forcing you to stop or maybe you get bored (in this case, the computation was done inside your brain). So, just after calculating all the things on the universe during the next 3 seconds we can answer for sure (with 100% of certainty). One argument therefore is that everything in the universe that is close enough (3 seconds at speed of light, disregarded relativity) can affect you during this 3 seconds. So, despite of the small probabilities, only when this 3 seconds finish, the uncertainty will disappear - all the computation was done.

If this assumption is reasonable, what are our brains? I would like to say that our brains are  biological computers implemented over the universal computer.  It is unable to work faster than speed of light and to do computations that are not possible in this universe. Also, if some component is replaced at the universal computer layer, e.g. some chemical substance in the brain, our hardware (brain) needs to adapt itself to it. Sometimes, it is unable to do that, e.g. Alzheimer's desease. Sometimes it regenerates. And there is also the brain plasticity.

Continuing, what about our software? I guess it runs over the brain. ;-) It is capable to explore brain redundancies. So what is consciousness? Is consciousness the ability to perceive our internal computations as well as part of the surrounding computations done by our universe around us? Is our consciousness limited by this ability to detect universe computations?

I posted this on a Linkedin community about Computing and Philosophy. Strong criticisms from entropy and other aspects.

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