On 27 Jun 2012, at 17:51, John Clark wrote:
On Tue, Jun 26, 2012 Bruno Marchal <[email protected]> wrote:
> Step 2 is that the diary of the one teleported does not mention
the delays of reconstitution in absence of third person clue.
Obviously true.
> Step 3, is that no machine can predict the content of its personal
future diaries content in self-multiplication experience.
Not counting quantum randomness the only reason the many diaries
will be different is that the many authors of those many diaries,
you, end up in different environments.
Specifically due to the fact that comp allows self-duplication. That
is the key point.
So "step 3" is just a convoluted way of saying that you can't always
predict how environmental factors will change nor how those factors
will effect you, which is just a convoluted way of saying that you
never know what new things the universe will throw at you, which is
just a convoluted way of saying that predicting is hard, especially
the future.
It has nothing to do with evolution of environment. The indeterminacy
is definite, and brought by the possibility of self-duplication.
> By the comp assumption, they can be copied and put in two
different environments, so that they will differentiate,
Yes.
> and that is why they cannot predict their experience, even in a
prior state of complete information of the issuing protocol.
If you really had complete information then you could make 2
predictions:
1) I Bruno Marchal will write in my diary "I Bruno Marchal am now in
Washington and only Washington".
2) I Bruno Marchal will write in my diary "I Bruno Marchal am now in
Moscow and only Moscow".
That's better. But still ignore the first/third person distinction.
Both predictions will turn out to be 100% correct;
Not from the first person point of view, when they relate to such
view. The one in washington can still say something like "BM" is in
Moscow, but not "I am in Moscow". And the question was bearing on "I",
not BrunoMarchal, which refers to a third person description.
a very odd situation certainly but it is paradoxical only if you
make the totally unwarranted assumption that there can only be one
Bruno Marchal,
This is implied by comp, trivially for the first person pov.
and without that assumption assigning probabilities to the question
"what city will I end up in?" is pointless because "I" is not defined.
You don't need to define it to get the point that the proba on the
localisation on the future sense of self is 1/2.
You ignore again the 1-3 distinction that I made precise.
Bruno
http://iridia.ulb.ac.be/~marchal/
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