Re: [asa] homology and analogy

From: Douglas Hayworth <>
Date: Sat Oct 10 2009 - 20:58:50 EDT

On Fri, Oct 9, 2009 at 10:51 PM, wjp <> wrote:

> Perhaps both you and Doug are correct.
> But, as far as I can tell, you have provided no reasons for me to see why.
> If you follow my argument, you ought to see that TE is one of those
> alternatives
> that are contrary to the Darwinian position I have outlined.
> The argument for common descent appears probabilistic, but it still seems
> to
> me that there is no logical way to eliminate from the argument for
> homologous structures other possibilities than Darwinian evolution,
> including
> TE and ID.
> If you see the logical argument differently, you will have to outline the
> argument, and demonstrate that it is not a tautology.

Of course, anything is possible (designed appearance of age and designed
appearance of phylogenetic relationship), but do you really want to hold out
for those unlikely possibilities when a completely sufficient and
demonstrably scientifically fruitful alternative mechanism is available?

The nested hierarchy of homology is not a tautology. The Linnaean taxonomic
system is a recognition of this nested structure, and it predates notions of
descent with modification and multiplication of species (i.e., evolution).
Together, the known mechanisms of heredity and the genotype-phenotype
relationship are exactly the sort of system that will produce this pattern
of variation. Evolution, which in its genetic basis was only a "hypothesis"
for Darwin, can now be regarded as "fact" because it is the only mechanism
that is completely specified by the complexity of information that is known
about biology.


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Received on Sat Oct 10 21:00:03 2009

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