Citeren meekerdb <meeke...@verizon.net>:
On 5/23/2013 4:31 PM, smi...@zonnet.nl wrote:
Citeren meekerdb <meeke...@verizon.net>:
On 5/23/2013 7:07 AM, smi...@zonnet.nl wrote:
Citeren Bruno Marchal <marc...@ulb.ac.be>:
On 23 May 2013, at 00:05, meekerdb wrote:
On 5/22/2013 2:49 PM, smi...@zonnet.nl wrote:
Thought experiment: Suppose that someone has never experienced
touching hot objects before. As long as this person does not
find out that touching hot objects is painful, either by
touching hot objects himself or by being told that it is
painful, he will be in a superposition of two sectors of the
multiverse where he has and has not the ability to feel
extreme pain when touching very hot objects.
The sector where he does not have the ability to feel pain has
a very small amplitude, there evolution has run a different
course. In the other sector evoluton has run the course where
the ancestors in the first sector ddidn't survive, it where
the creatures with some mutation that lead to them feeling pain
when touching hot objects that survived here.
The mere act of touching a hot object is a measuremnt which
locates the person in the latter sector, only then does the
outcome of the events that happened a long time ago become
determined.
That assumes that the "same person" exists up to the moment of
measurement, differing, via FPI, only in the ability to feel
pain. I doubt that is possible. There is a common assumption
that QM makes anything possible, but it actually imposes some
restrictions, although it's hard to say how they extend to the
biology of macroscopic beings.
I agree. Even in comp there are "terrible" restrictions on what
comp states exist and how they are first person and third person
related. Indeed that's why we can extract physics (and a whole
theology) from numbers and + and *.
Bruno
http://iridia.ulb.ac.be/~marchal/
It can be shown quite rigorously that everything that is not
strictly forbidden by conservation laws, must happen in generic
multiverse scenarios.
Do you have a citation for that? And how do you know what
conservation laws there are?
See e.g. here:
http://arxiv.org/abs/gr-qc/0102010
for the proof for eternal inflation models.
That doesn't prove what you claimed. Garriga and Vilenkin argue that
there are only finitely many distinct histories, say N. But in that
case no possible history with probability less than 1/N can occur.
Although N is very large, only very small fraction of histories
permitted by conservation laws can occur.
No, all the possible histories can occur, it's just that in a finite
volume you only have a finite number of states.
Saibal
Brent
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