in turn Re: A calculus of personal identity

2006-06-27 Thread Stathis Papaioannou

Brent Meeker writes:

  If the duplicate did not feel he was the original, then he wouldn't have 
  all the memories and personality of the original, would he? 
 
 Well that's the question isn't it.  Is there something besides memories and 
 personality that makes 
 you you.  Could you feel that your memories belonged to somebody else?  I 
 think that no duplication 
 is going to be perfect - it's just a question of whether the difference will 
 be detectable with 
 reasonable effort.  If one remembers having a green pencil in the first grade 
 and the other 
 remembers having a blue one, how could anyone know which is right?

Is the duplication process good enough to match or better the mechanisms 
naturally in place to preserve the functional integrity of the brain from 
moment to moment? That is the question that needs to be answered. It would be 
unreasonable to speculate that the duplicate may not be the same person as the 
original based on some test which, if applied consistently, might also cast 
doubt on whether we are still the same person from moment to moment in ordinary 
life. Putting it differently, maybe we *aren't* the same person from moment to 
moment: maybe we are constantly dying, to be replaced by a close, but 
necessarily imperfect copy. After all, nature will not evolve a system to 
perfectly preserve mental attributes throughout life just because such an 
arrangement is aesthetically pleasing. Preservation of the majority of 
memories, personality, other learned and instinctive behaviours, and a *belief* 
that we are the same person throughout life so that we will plan for our future 
well-being are the only qualities that evolution could act on. Since our brains 
are being continuously rebuilt at considerable metabolic expense, any subtle 
mental quality that has no effect on behaviour would be ruthlessly pared away 
by evolution's razor. 

Stathis Papaioannou
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Re: in turn Re: A calculus of personal identity

2006-06-27 Thread Brent Meeker

Stathis Papaioannou wrote:
 Brent Meeker writes:
 
 
 If the duplicate did not feel he was the original, then he wouldn't have 
 all the memories
 and personality of the original, would he?
 
 Well that's the question isn't it.  Is there something besides memories and 
 personality that
 makes you you.  Could you feel that your memories belonged to somebody else? 
  I think that no
 duplication is going to be perfect - it's just a question of whether the 
 difference will be
 detectable with reasonable effort.  If one remembers having a green pencil 
 in the first grade
 and the other remembers having a blue one, how could anyone know which is 
 right?
 
 
 Is the duplication process good enough to match or better the mechanisms 
 naturally in place to
 preserve the functional integrity of the brain from moment to moment? That is 
 the question that
 needs to be answered. It would be unreasonable to speculate that the 
 duplicate may not be the
 same person as the original based on some test which, if applied 
 consistently, might also cast
 doubt on whether we are still the same person from moment to moment in 
 ordinary life. Putting it
 differently, maybe we *aren't* the same person from moment to moment: maybe 
 we are constantly
 dying, to be replaced by a close, but necessarily imperfect copy. After all, 
 nature will not
 evolve a system to perfectly preserve mental attributes throughout life just 
 because such an
 arrangement is aesthetically pleasing. Preservation of the majority of 
 memories, personality,
 other learned and instinctive behaviours, and a *belief* that we are the same 
 person throughout
 life so that we will plan for our future well-being are the only qualities 
 that evolution could
 act on. Since our brains are being continuously rebuilt at considerable 
 metabolic expense, any
 subtle mental quality that has no effect on behaviour would be ruthlessly 
 pared away by
 evolution's razor.

Well, only assuming there is some evolutionary cost to them.   There might be 
lots of what Gould 
called 'spandrels'.  But what I'm wondering is whether the *belief* that we're 
the same person is 
some wholistic property of the brain or is it just some small module.  If the 
latter then it seems 
possible the duplicate could have all the other attributes, but lack that 
belief.  This seems 
perfectly plausible, since I can have doubts about other things why not doubt 
I'm me?

Brent Meeker


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