[Phys-L] Re: [SPAM-4.000] ultrametricity +- evolution

[James E Mackey <jmackey@HARDING.EDU>]

John Denker wrote
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As various people have mentioned, there is overwhelming evidence of this,
including macroscopic evidence as well as DNA evidence.

The DNA evidence leads to, among other things, nice diagrams of the "tree
of life" ... such as
   http://tolweb.org/tree?group=Terrestrial_Vertebrates
   http://tolweb.org/tree?group=Eutheria

The point I would like to make is that the very existence of such diagrams
is evidence for evolution.  That is, the fact that it is possible to make
such diagrams is consistent with the idea of molecular evolution, and would
be a spectacularly implausible coincidence in the absence of evolution.
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Such diagrams are constructed assuming evolution occurs, so how their existence be considered proof for evolution? Is there some circular reasoning here?
James Mackey
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