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- Newsgroups: comp.ai.philosophy
- Path: sparky!uunet!spool.mu.edu!darwin.sura.net!cs.ucf.edu!news
- From: clarke@acme.ucf.edu (Thomas Clarke)
- Subject: Re: It is AI when...
- Message-ID: <1992Nov19.141459.4313@cs.ucf.edu>
- Sender: news@cs.ucf.edu (News system)
- Organization: University of Central Florida
- References: <BxpIsD.H1E@cs.bham.ac.uk>
- Date: Thu, 19 Nov 1992 14:14:59 GMT
- Lines: 84
-
- In article <BxpIsD.H1E@cs.bham.ac.uk> axs@cs.bham.ac.uk (Aaron Sloman) writes:
- > clarke@acme.ucf.edu (Thomas Clarke) writes:
- >
- > > Date: 12 Nov 92 20:22:05 GMT
- > > Organization: University of Central Florida
- > ....
- > > If you can discern how it works it's not truly intelligent behavior.
- > > You'll know its truly intelligent when you can't figure out how it
- > > works.
- >
- >
- > This implies that
- > EITHER
- >
- > (a) human beings, chimpanzees, squirrels (and other things) are
- > not truly intelligent
- >
- > OR
- > (b) we'll never understand how they work
- >
- > I see no reason to believe either, though understanding how they
- > work is very difficult and is likely to take many more years. I see
- > current AI/Cognitive science as being at a stage that could be
- > compared with Galileo's understanding of physics: i.e. some
- > important new ideas have emerged, but there`s still a very long way
- > to go.
-
- Let me clarify my definition of what I mean by understanding.
- We already understand in a general way how intelligence works in
- humans et al: it involves a massively parallel network of neurons.
-
- I have in mind a more precise definition of understanding:
- (I call this strong understanding, but then someone has
- probably already used this term in some other sense. Not being
- a professional philosopher, I'm not sure.)
-
- A process is strongly understood when it is in principle possible
- to manipulate the process so as to control the process over a finite
- time span using control inputs of smaller Kolomogorov-Chaitin
- complexity than the process behavior.
-
- I insert "in principle" since while something may be understood, its
- control may be beyond engineering practice. Control of the brain
- may require 10^N (a larger number) of fine platinum electrodes to be
- embedded in the appropriate neurons - possible in principle. but
- certainly not in current practice.
-
- The stuff about "Kolomogorov-Chaitin" complexity is there to eliminate
- control some sort of real-time statistical control wherein the
- inputs are adjusted continuosly in some sort of tight feedback loop.
- No fair to make the person go to the refrigerator and eat fudge by
- controlling all the individual afferent neurons involved in the
- activity. You have to know where the "higher level centers" are and
- the "code" that they use so you can input "hunger, sweet, cold, get"
- or some equivalent and have this brief message generate the
- complex behavior.
-
- "Smaller" means of smaller exponential order, or one of various
- similar concepts appropriate for the process.
-
- The "finite time span" is there to take care of chaotic dynamics.
- I think one can say that weather is can be strongly understood.
- However, chaos prevents control of the weather beyond a horizon of
- several days; no matter how complete the thermodynamic transducers
- available to the meteorologor, without real-time feedback the weather
- will diverge from the desired outcome in a few days.
-
- "Finite" should be taken in the mathematicians since of having a lower
- bound. I should be more precise about what "finite" means, but I'm
- trying to keep my definition "finite":-)
-
- I don't think my earlier statement, which now becomes "intelligence
- will never be strongly understood", applies only to AIs that are
- continuous or neural. An algorithmic (Turing machine) AI could fail to
- be strongly understood. Its code could be generated by some sort
- of genetic process that fails to supply documentation so that the
- problem of strongly understanding the code in order to control the
- AI's behavior is NP-complete or, worse yet, undecidable.
-
- --
- Thomas Clarke
- Institute for Simulation and Training, University of Central FL
- 12424 Research Parkway, Suite 300, Orlando, FL 32826
- (407)658-5030, FAX: (407)658-5059, clarke@acme.ucf.edu
-