Stathis Papaioannou wrote:
On 4 May 2015 at 17:06, Bruce Kellett <bhkell...@optusnet.com.au> wrote:
Stathis Papaioannou wrote:
On 4 May 2015 at 16:19, Bruce Kellett <bhkell...@optusnet.com.au
What is the point of two identical quantum states if you don't know which
two are identical? It seems to me that copying at will is what is
required.
We are not talking about a copy by random chance, or about an incidental
copy in some other (disjoint) portion of the multiverse.
A copy of you would be no less a copy if it popped up somewhere in the
universe by chance than if it were deliberately created.
If it is outside my Hubble volume then I can know nothing about it and it
does not matter to me in the least. The point of the copying argument was to
implement FPI. If it is not the here-and-now me that is copied, but a chance
duplicate outside my Hubble volume, I couldn't care less.
Why should it make any difference if you know anything about the copy?
You could be deliberately but surreptitiously copied, or a child who
doesn't understand any of the philosophical implications, and it would
make no difference to the argument.
The initial point that we were making was that copying at the quantum
level of substitution is not possible, in principle. Accidental copies
in another universe are not "deliberate but surreptitious" copies. They
are irrelevant to the argument.
Bruce
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