On 01 Jul 2015, at 17:47, John Clark wrote:
On Tue, Jun 30, 2015 at 4:22 PM, Bruno Marchal <marc...@ulb.ac.be>
wrote:
>> Two first person perspectives are NOT equivalent to one
third party perspective. And in Bruno's thought experiment there is
simply no alternative, like it or not after the duplication there
are two first person perspectives around (that's what duplication
means) so they must be dealt with.
> Which is exactly what we do by interviewing them all, and the
prediction "W v M" wins. The prediction "W and M" lost
John Clark has no idea what the prediction would be if Bruno
Marchal were the Helsinki Man, but if it were John Clark the
prediction would be the following:
" I John Clark currently living in Helsinki predict that after John
Clark steps into the duplicating chamber John Clark will see Moscow
AND Washington"
This is ambiguous. Do you mean that John Clark will see Moscow AND
Washington in the sense that John Clark will write in his diary "I see
Moscow and Washington"?
Or do you mean that
John Clark will see (only) Moscow and John Clark will see (only)
Washington?
In that last case, each "John Clark" will write only "I see W", (resp.
M) in the diary, and this makes the point, given that in the preceding
case, both will refute the prediction (none will ever write "I-Joihn
Clark see both W and M".
You continue to ignore the difference between the 3-view on the many 1-
views, and the 1-views' content themselves.
Bruno
And after John Clark stepped into the duplicating chamber
a document is obtained from a man in Moscow saying "I John Clark see
Moscow" AND a document is obtained from a man in Washington
saying "I John Clark see Washington". And so it is logical to
conclude that the prediction John Clark made in Helsinki turned out
to be correct; not that predictions, correct or incorrect, have
anything to do with personal identity.
John K Clark
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