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. But then, the whole point I'm making is that the information
in your brain that makes you feel something comes not out of thin air,
but precisely due to evolution. So, you feeling pain comes about via
ordinary down to earth quantum mechanics, which links this
straightforwardly to the deaths of those creatures that by dying and
not becoming your ancestors, gave rise to your ability to feel pain.
Saibal
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