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- Newsgroups: talk.origins
- Path: sparky!uunet!enterpoop.mit.edu!galois!riesz!tycchow
- From: tycchow@riesz.mit.edu (Timothy Y. Chow)
- Subject: Re: Topic for Discussion?
- Message-ID: <1993Jan24.023652.8439@galois.mit.edu>
- Sender: news@galois.mit.edu
- Nntp-Posting-Host: riesz
- Organization: None. This saves me from writing a disclaimer.
- References: <1jo29o$srt@agate.berkeley.edu> <106254@netnews.upenn.edu> <1jq3p3INNa89@fido.asd.sgi.com>
- Date: Sun, 24 Jan 93 02:36:52 GMT
- Lines: 25
-
- In article <1jq3p3INNa89@fido.asd.sgi.com> livesey@solntze.wpd.sgi.com (Jon Livesey) writes:
- <Secondly, the obvious "escape" here is to say "Well, micro-
- <evolution doesn't actually consult a species representation,
- <it's just that eventually cumulative micro-evolution produces
- <non-functional organisms. In fact, that's not an escape,
- <because now you're saying that the representation "valid species"
- <is a function of the species+environment, and micro-evolution
- <can continue to produce cumulatively differing changes as long
- <as it stays within this representation. But the information
- <in "species+environment" certainly changes over time. In fact,
- <that's the point, isn't it.
-
- I don't understand your argument. Imagine a "genotype graph" where each
- node is a genotype and the edges represent microevolutionary steps. Why
- can't there be a set of nodes that is "isolated" in the sense that it is
- bordered by genotypes which code seriously dysfunctional organisms that
- can't exist in any environment short of an intensive care unit? I think
- you need to appeal to what we actually know about extant genotypes; I don't
- think you can argue your case purely on extremely general considerations,
- as you seem to be trying to do.
- --
- Tim Chow tycchow@math.mit.edu
- Where a calculator on the ENIAC is equipped with 18,000 vacuum tubes and weighs
- 30 tons, computers in the future may have only 1,000 vacuum tubes and weigh
- only 1 1/2 tons. ---Popular Mechanics, March 1949
-