Henry Bemis Wrote:
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> However, the
> nature of the physical laws that are in play here
> remains largely metaphysical. We no longer have
> scientific reduction, such that the whole is
> simply explained by the sumation of its parts.
I think your definition of metaphysical is anything that isn't fully explicable and verified/validated by a current model. That's not at all how science views it. Metaphysical is defined as something that cannot be observed empirically by/thru physical laws. It is Meta (above) physics. That goes against the scientific method. If it is a physical law that can not be understood through observation, then it is not a physical law, according to the scientific method. If you want to persist that the universe can be understood without observation, then it seems you mean the version of the universe you perceive in your thoughts only. That's not relevant to the masses.
> So, what scientific law (i.e. mathematically
> defined prinicple) "explains" why such complex,
> ordered, emergent properties to arise? (By the
> way, your use of the pejoritive term "metaphysical
> myth" is misplaced. Metaphysics plays a very
> significant role in modern science and should not
> be associated casually with religious connotation
> of "myth")
I disagree. I don't think is has a role in science. That's just my opinion as one working in science.
> "Free will, defined as choosing when faced with
> options can be simply one biophysical gate opening
> and another closing due to slight differences in
> membrane potentials of the action potentials
> incident at the gates. The potential differences
> can be explained entirely physically. That fork in
> the road is biophysical."
>
> This in no way explains free will. What you are
> describing are purely subtle, but deterministic,
> biological processes.
Yep. I know. And I believe it does explain "free will" because I believe that free will is probably an illusion in the mind. I would like to be wrong, but parsimony says that if the current model continues to explain observations then an extra/added hypothesis about a metaphysical "process" is unneeded.
> such deterministic
> processes cannot account for free will in any real
> and meaningful way.
That's a belief on your part. Evidence in neuroscience so far is showing that it is explicable by these processes. I've yet to see something that is really well outside of the current physical model. If you can present it, I would be interested.
Saying that free will is inexplicable is not the same as it being inexplicable. I realize that magic (metaphysics) is a core part of your belief, but it's not part of science.
> Well, of course, that is the entire question. If
> personhood or subjective mind is an emergent
> property of the deterministic brain (The common
> assumption), then presumably the processes of the
> mind are also deterministic. It is hard to see
> how real (not illusional) free will can emerge
> from deterministic brain processes, especially
> considering the causal closure of the physical.
And if a model of emergent complex process can show decision making ability, which for all intents and purposes mimics our free will, then the extra gap-filler of metaphysical personhood goes away.
Examples of strides in this area are:
This web-based program has fooled humans thinking that they talk with humans real-time. In other words, the computer can communicate topics and transition/choose its words in realtime.
http://cleverbot.com/(see * below)
"A Digital Neurosynaptic Core..."
http://www.modha.org/papers/012.CICC1.pdfand many others in cognitive computing.
> So, what then is personhood? In one sense it is
> either a profound illusion; or we have to look
> beyond the deterministic brain for the answer.
> Neither option is very satisfactory.
You're right that most people won't be happy to learn it is deterministic and physical, without magic. But people have almost always had a lot of ego about their position in the universe.
* from the wiki on cleverbot:
Cleverbot took part alongside humans in a formal Turing Test at the 2011 Techniche festival at the Indian Institute of Technology Guwahati on September 3, 2011. Out of the 1,334 votes cast, Cleverbot was judged to be 59.3% human, compared to the rating of 63.3% human achieved by the actual humans. A score of 50% or higher is often considered to be a pass of the Turing Test.
Edited 2 time(s). Last edit at 02/22/2012 11:55AM by Jesus Smith.