Re: (non-flame post) in silico evolution (FPGAs)

From: Richard Wein (rwein@lineone.net)
Date: Tue Oct 10 2000 - 07:35:55 EDT

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    From: DNAunion@aol.com <DNAunion@aol.com>

    [...]
    >>Face it. The in silico circuit evolution experiment absolutely required
    >both the hardware and the software, and they both absolutely required
    >intelligence for their design and creation, and the selection does not
    model
    >nature &#8211; it incorporates the external teleological process of
    >comparing each output along the way with a desired, predetermined, fixed,
    >goal and retaining the one that is the closest match.

    No. You are confusing the overall goal with the fitness function.

    The fact that there was an overall goal (to evolve a circuit to discriminate
    between square waves of 1kHz and 10kHz ) is irrelevant, because this goal
    was not built into the experiment. This is analogous to biological
    evolution, where some people (based on religious or anthropic principles)
    might claim that biological evolution had the overall goal of producing
    intelligent life. But such an overall goal (if it exists) is irrelevant to
    the performance of biological evolution.

    There was indeed a fitness function built into the experiment (maximising
    the difference between the average output voltage when a 1kHz input is
    present and the average output voltage when the 10kHz input is present), but
    this again is analogous to biological evolution. The fitness function of
    biological evolution, roughly speaking, is maximising the reproduction rate
    of the individual.

    So the experiment *is* analogous to biological evolution. It demonstrates
    that random variation plus a suitable fitness function can lead to new and
    complex results.

    Richard Wein (Tich)
    --------------------------------
    "Do the calculation. Take the numbers seriously. See if the underlying
    probabilities really are small enough to yield design."
      -- W. A. Dembski, who has never presented any calculation to back up his
    claim to have detected Intelligent Design in life.



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