scott nous apporta ses lumieres en ce 2007/11/14 03:01:
>> Not at all! If you could realy have all of that information for every 
>> atoms in the univers, you could conceivably be able to predict when a 
>> star will apears, how long it will live, how it will finish, if it 
>> will have planets and how many, the exact description of every single 
>> one, if it will host any life, and if inteligent life will apears. All 
>> that for a future star for whitch most of it's constituant matter is 
>> still contained in several other stars. Star that will only start to 
>> form in a billion years.
> 
> Could the machine also tell you exactly what happened in the past?
Absolutely!
> 
> The key question is if it is possible to predict the exact behaviour of 
> every particle based on its current state.  Are there not some things 
> that exhibit truly random behaviour?
> 
> 
Quantum fluctuations, with it's probability coud, is purely random. But, the 
random range is prety tight, even if it extend almost to infinity.
Take any given electron at rest. You can know it's location within an amstrong 
radius, and you have more than a 99.999999% chance to effectively find it within 
that radius, BUT, there is a non-zero chance to find it at over 1 light-year away.

-- 
Alain
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'Power corrupts. Absolute power is kind of neat, though.'

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