On 15 Jul 2016, at 03:19, Bruce Kellett wrote:
On 15/07/2016 11:03 am, Brent Meeker wrote:
On 7/14/2016 5:07 PM, Bruce Kellett wrote:
On 15/07/2016 9:42 am, Jason Resch wrote:
I printed the following "Duplicate Questionnaire" and gave one to
both John-Washington, and John-Moscow. The questionnaires each
had 8 questions:
1. What city did you last recall being in?
2. How many cities do you see now?
3. What is the name of the city you see before you?
4. True/False: You see two cities right now:
5. True/False: The prediction that you see Washington was:
6. True/False: The prediction that you see Moscow was:
7. True/False: The prediction that you see Washington and Moscow
was:
8. True/False: The prediction that you see Washington or Moscow
was:
When I gave the questionnaire to John-Washington, he filled out
the following answers (in bold):
1. What city did you last recall being in? Helsinki
2. How many cities do you see now? One
3. What is the name of the city you see before you? Washington
4. True/False: You see two cities right now: False
5. True/False: The prediction that you see Washington was: True
6. True/False: The prediction that you see Moscow was: False
7. True/False: The prediction that you see Washington and Moscow
was: False
8. True/False: The prediction that you see Washington or Moscow
was: True
When I gave the questionnaire to John-Moscow, he filled out the
following answers (in bold):
1. What city did you last recall being in? Helsinki
2. How many cities do you see now? One
3. What is the name of the city you see before you? Moscow
4. True/False: You see two cities right now: False
5. True/False: The prediction that you see Washington was: False
6. True/False: The prediction that you see Moscow was: True
7. True/False: The prediction that you see Washington and Moscow
was: False
8. True/False: The prediction that you see Washington or Moscow
was: True
Both Johns expressed deep regret over insulting people on the
Everything list, most especially Bruno. It turned out neither
John-Washington's, nor John-Moscow's prediction that they would
see both cities was true from their own first person points of
view.
But you have introduced a distinction between John-W and John-M
that is not present in the original protocol. Remember that the
criterion of personal identity you are working with is based on
person memories (verified by a personal diary if necessary). Both
copies of John have these memories and these diaries, so they both
have equal claims to be John. "John", as this duplicated person,
predicts with certainty that he will see W, and that he will see
M, so he predicts that he will see both cities.
The fact that this appears odd is that our conventional intuition
is essentially dualist -- we think that there is a central core
that is the "real me" that gives me my continuing sense of
personal identity. This intuition breaks down when you have
duplication of persons.
Although I think JKC has a point about pronouns, I don't see what
it has to do with Bruno's theory. He just proposes this as an
illustration of first-person-indetermancy as implicit in Everett's
interpretation of QM. It has problems with probability, but so
does Everett's QM - what does probability refer to when everything
happens. The question of which JKC just gets mapped to which world.
Exactly. I have made this point before. The first six or seven steps
of Bruno's argument are not really necessary. It is only when he
moves the Universal Dovetailer into platonia in step 8
in step 7. (step 8 just eliminates the concrete physical UD involved
in step 7).
that anything new actually happens. He could have started there and
argued for the reversal of physics and computationalism directly.
The duplication of persons is just a distracting irrelevance to the
main argument, and depends so heavily on a particular theory of
personal identity as to be essentially useless.
It depends on any identity theory in which you survive completely with
a brain transplant, that is what the step 1 is all about. You
illustrate that such an easy step was needed, it seems to me.
Bruno
Bruce
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