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Re: Re: Artificial Intelligence Programming in Perl

by cjf (Parson)
on Jul 01, 2002 at 13:28 UTC ( #178541=note: print w/ replies, xml ) Need Help??


in reply to Re: Artificial Intelligence Programming in Perl
in thread Artificial Intelligence Programming in Perl

I thought AI was declared dead in the 80s of the previous century

Declared dead by who? What were they referring to by AI?

As for the P = NP problem, I found the following description:

A major unsolved problem in computer science is the so-called P=NP problem: machines are considered in which there is a certain amount of freedom in choosing the next step in a computation (such machines are called non-deterministic). By making good guesses (or choices) one can often obtain a quicker computation than by systematically working through all possible cases in a deterministic way. The P == NP problem asks whether every function computable on a non-deterministic machine in polynomial (i.e., tractable) time is computable in polynomial time on ordinary (deterministic) machines.
-- N. J. Cutland, Computability. Cambridge University Press, 1980. p. 238.

Everything that can be invented has been invented. - Charles H. Duell, US Commissioner of Patents, in 1899.

Update: I've found several papers on the subject including Is the NP problem solved?. Haven't had a chance to read through them yet, but they look interesting.

Update 2: A short introduction to quantum computation


Comment on Re: Re: Artificial Intelligence Programming in Perl
Re: Artificial Intelligence Programming in Perl
by Abigail-II (Bishop) on Jul 01, 2002 at 14:01 UTC
    Declared dead by who?
    The academic world? The Computing Science community? In the 80s and the 90s, AI was defocussed on. It of course never disappeared, but it certainly wasn't as prominent as in the late 70s and early 80s.
    What were they referring to by AI?
    Eh, "Artificial Intelligence"? ;-) Making complex decisions as fast and in a similar way as humans can?

    I just read through the paper you referred to, and it looks a bit bullshit to me. P and NP problems are defined for Turing machines, quantum machines are a fundamentally different class of machines. There are other machines possible where it hardly makes sense to talk about P and NP (take for instance an oracle and each time your algorithm has to guess, you ask the oracle instead).

    I do however have serious doubts about the feasability of quantum computers. Perhaps when the NSA starts decrypting 4096 bit GPG messages almost instantly I'll become a believer.

    Abigail

      Generally I agree with this and your other post. AI has all the hallmarks of a degenerate research programme. But I did want to raise one point... ;-)

      Eh, "Artificial Intelligence"? ;-) Making complex decisions as fast and in a similar way as humans can?

      This combines what I would consider the two primary objectives of AI in a way that makes them sound like one.

      1. AI as an investigative tool for a plausable model of cognition. Much work was invested into AI as a method to explain how we think we think. This research tended to be very domain specific and scaled poorly. It also had fundamental philosophical problems that put to lie many of the grandisoe claims that were made by it.
      2. AI as an approach to solve problems that computers are typically bad at and humans are typically good at. This was a slighly more fruitful avenue. Usually the models bore little if any relationship to how we think we think. Examples of this are the AL work done in emergent phenomenon, GA's, neural networks.
      The former appears to be almost totally abandonded. (Although high quality chess programs are perhaps one of its successes.) The latter is being used in a small number of unlikely areas with considerable success. (Chip design is a notable example)

      Yves / DeMerphq
      ---
      Writing a good benchmark isnt as easy as it might look.

Re: Re: Re: Artificial Intelligence Programming in Perl
by grantm (Parson) on Jul 01, 2002 at 14:16 UTC
    Everything that can be invented has been invented

    The Charles Duell Rumour:

    While that statement makes good fun of predictions that do not come to pass, it is none the less just a myth.

      Hmm, well that's okay, I've got more where that came from:

      • Heavier-than-air flying machines are impossible. - Lord Kelvin, president, Royal Society, 1895
      • I think there is a world market for maybe five computers. - Thomas Watson, chairman of IBM, 1943
      • There is no reason for any individual to have a computer in their home. - Ken Olsen, president, chairman and founder of Digital Equipment Corp., 1977
      • The telephone has too many shortcomings to be seriously considered as a means of communication. The device is inherently of no value to us. - Western Union internal memo, 1876
      • Airplanes are interesting toys but of no military value. - Marshal Ferdinand Foch, French commander of Allied forces during the closing months of World War I, 1918
      • The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular? - David Sarnoff's associates, in response to his urgings for investment in radio in the 1920's
      • Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react. He seems to lack the basic knowledge ladled out daily in high schools. - New York Times editorial about Robert Goddard's revolutionary rocket work, 1921
      • Who the hell wants to hear actors talk? - Harry M. Warner, Warner Brothers, 1927

      Strike them down and others will take their place! ;-)

        Me too!
        • Ether exists.
        • Phlogiston exists.
        • Maggots on rotting food are spontaneously generated.
        • The earth is flat.
        • It is impossible to write structured Perl.
        • Perl is only useful for text-processing.
        • ESP is possible.
        • Crop circles must be of extraterrestrial origin.
        • Perl is a write-once language.
        • The tooth fairy took your old tooth and left you some money.
        • Computers can do anything.
        • It is possible to trisect any angle using only compass and straightedge.
        • The Internet has created a New Economy which is not bound by the rules of the old economy.
        We happen to know (I hope) all of them are flat-out wrong. And each has been stated in the past as true. For some of them there is very little empirical evidence; for the rest, there is none.

        The only question is: into which category are you putting AI? That people have been wrong is no argument, either way. So why repeat the point that people have incorrectly claimed that possible things are impossible? People have also correctly claimed that impossible things are impossible!

        Don't forget:
        • "640K ought to be enough for anybody." - Bill Gates, 1981

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