[ExI] Do digital computers feel?
bbenzai at yahoo.com
Mon Dec 19 10:21:24 UTC 2016
I see this silly 'fundamental red' argument has been raised from the
dead yet again. I thought we'd knocked it on the head ages ago, but
Brent's 'fundamental red' concept has a glaring, fundamental flaw:
The idea that conscious perception of a colour (and presumably, by
extension, any other conscious perception) is a 'fundamental quality'.
This simply cannot be. It's at odds with what we know about
neurobiology, and it's logically infeasible. The sensation of 'yellow'
is not a simple, single thing in our brains, it's a combination of many
many things, varying over time and dependent on individual experiences,
memories, associations of varying strengths and types, and variations in
brain wiring. And probably other things we don't yet know about. It
would be a very odd thing indeed if yellow, green, red, blue, orange,
pink, that vaguely bluish-grey you often see in the clouds, etc., etc.,
not to mention literally billions of other sensations, were each
'fundamental qualities'. That's stretching the concept of 'fundamental'
to breaking point, for a start.
If a single neurotransmitter like glutamate embodied a single concept
like 'red', how many neurotransmitters would we need? How many colours
can we perceive? How many other sensations are we capable of perceiving?
There's only one known way of representing such an enormous number of
things, and that's by combining a smaller number of simpler (or more
fundamental) things. We know how this works, are quite good at it, and
see examples of it again and again in nature. Including in our brains.
Biology is especially good at this, as anyone who's studied virtually
any aspect of biology will know.
It's just as easy to say "purple" as it is to say "car", but neither
thing is a 'fundamental' phenomenon. There are probably as many shades
of purple as there are types of car, and I'd guess that the creation of
the sensation of a specific colour purple in a person's mind is roughly
comparable in complexity to the construction of a specific car.
Conscious sensation, at the very least, has to be a complex phenomenon,
involving many neuronal events. The only 'fundamental' items here are
spike trains (no, not trains belonging to Spike) or even individual
An analogy with computers would be thinking that the characters in a
video game were 'fundamental qualities' of the computer, while ignoring
the fact that everything the computer does is a result of combinations
of ones and zeros, which are themselves actually voltages on wires and
in semiconductors. I know it's weird and a bit unintuitive that all of
Halo, Minecraft, etc., boil down, fundamentally, to various combinations
of 0 and +5 volts, but it's true.
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