Bruno Marchal wrote:
On 28 Jun 2015, at 09:45, Bruno Marchal wrote:
Bruce Kellett wrote:
But the alternative does not establish the required result either. If
the brain ceases to be conscious as the connections are removed --
either gradually or with the loss of some critical number of
connections -- then the hypothesis of physical supervenience is
substantiated.
As much as computationalism.
Nothing to do with computationalism at this stage.
If it remains conscious (even though simply replaying a previous
conscious experience) even when only the recording playback remains,
then physical supervenience is still substantiated,
Making the physical supervenience thesis ridiculous, given that the
recording does no more compute anything related to the original
experience.
This is merely an assertion, at best an argument from incredulity, it is
not a proof.
This is why we have to abandon physical supervenience
thesis: consciousness is in the abstract computations, not in any of its
particular implementation (but then we will need to take all of them
below the substitution level, and thus get an interesting problem,
partially solved.
But you haven't abandoned the physical supervenience thesis, because you
will not allow me to remove your brain entirely, leaving you to subsist
purely on arithmetic. As long as the physical brain, whether of primary
or emergent physicalism, has any role at all, you have not established
computationalism or eliminated materialism.
because the recording is every bit as physical as the original brain
connections. In the "Yes, Doctor" argument, you are agreeing to have
your brain replaced by an emulation on a physical computer.
For the sake of the reasoning, yes.
So accept the reasoning, then scrape your brain out of your skull.
I doubt that even you would agree for the doctor to remove your brain
and replace it with a universal number tattooed on your forehead.
You might need to study how we program a computer. Tattooing the code on
their front-head might not been enough, indeed.
So the program is not enough. It must be run on some physical device?
This is JC's point, and you have not ever answered it satisfactorily. To
do that, you would have to ask the doctor to replace your brain with a
non-material program or some universal numbers.
Bruce
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