Hi,

David Deutsch argues in Fabric of Reality that only the Multiverse 
conserves quantity (not single branches). The rest is probabilistic 
stuff (see Bruno's post)

Cheers,
Günther

Telmo Menezes wrote:
> Yes, you're right. Still I think my argument holds. The production of
> the rifle, bullet and geiger counter system plus the geiger counter
> operation should produce more than enough entropy to compensate for
> the atom not decaying.
> 
> On Thu, Apr 17, 2008 at 1:45 PM, Michael Rosefield
> <[EMAIL PROTECTED]> wrote:
>> It's not so much the input of energy, it's the production of more entropy
>> where the energy is taken from.
>>
>>
>>
>> On 17/04/2008, Telmo Menezes <[EMAIL PROTECTED]> wrote:
>>> I would like to argue that in setting this experiment, energy is being
>>> expended to prevent the increase in entropy, albeit not in an obvious
>>> way.
>>>
>>> It is a trivial observation that systems may be devised that prevent
>>> increases in entropy by paying energy costs. One example is an ice
>>> cube in the freezer.
>>>
>>> In the case of this experiment, and assuming MWI, we are creating a
>>> scenario where the atomic decay is not possible from the
>>> experimenter's perspective. However, the experimenter is setting a
>>> system that includes the rifle and the geiger counter. Both these
>>> devices need energy to operate. Maybe it's just a convoluted version
>>> of the ice cube in the freezer?
>>>
>>> Best regards,
>>> Telmo Menezes.
>>>
>>> On Tue, Apr 15, 2008 at 12:18 AM, nichomachus
>>>
>>> <[EMAIL PROTECTED]> wrote:
>>>>  In the description of the quantum immortality gedanken experiment, a
>>>>  physicist rigs an automatic rifle to a geiger counter to fire into him
>>>>  upon the detection of an atomic decay event from a bit of radioactive
>>>>  material. If the many worlds hypothesis is true, the self-awareness of
>>>>  the physicist will continue to find himself alive after any length of
>>>>  time in front of his gun, since there exist parallel worlds where the
>>>>  decay does not occur.
>>>>
>>>>  On a microscopic scale this is analogous to the observing a reality in
>>>>  which the second law of thermodynamics does not hold. for example,
>>>>  since there is a non-zero probability that molecular interactions will
>>>>  result in a decrease in entropy in a particular sealed volume under
>>>>  observation, there exist histories in which this must be observed.
>>>>
>>>>  This is never observed. Therefore the MWI is shown to be false.
>>>>  >
>>>>
>>>
> 
> > 
> 

-- 
Günther Greindl
Department of Philosophy of Science
University of Vienna
[EMAIL PROTECTED]
http://www.univie.ac.at/Wissenschaftstheorie/

Blog: http://dao.complexitystudies.org/
Site: http://www.complexitystudies.org

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