Colin Hales writes:

> >> To bench test "a human" I could not merely
> >> replicate sensoiry feeds. I'd have to replicate the factory!
> >
> > As in brain-in-vat scenarios. Do you have a way of showing
> > that BIV would be able to detect its status?
> 
> I think the BIV is another oxymoron like the philosophical zombie. It
> assumes that the distal processes originating the casuality that cause the
> impinging sense data (from the external/distal world) are not involved at
> all in the internal scene generation. An assumption I do not make.
> 
> I would predict that the scenes related to the 'phantom' body might work
> because there are (presumably) the original internal (brain-based) body
> maps that can substitute for the lack of the actual body....But the scenes
> related to the 'phantom external world' I would predict wouldn't work. So
> the basic assumption of BIV I would see as flawed. It assumes that all
> there is to the scene genreation is what there is at the boundary where
> the sense measurement occurs.
> 
> Virtual reality works, I think, because in the end, actual photons fly at
> you from outside. Actual phonons impinge your ears and so forth.

What you have just said suggests that you do believe in some sort of ESP, 
for how else could you tell whether an impulse travelling down your optic 
nerve originated from a photon hitting the retina or from direct nerve 
stimulation?

Stathis Papaioannou
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