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Re: correct this "definition"

On Wed, Apr 16, 2008 at 3:37 PM, T. Michael Keesey <keesey@gmail.com> wrote:
>  To sum up: the diagnosis may fluctuate as new data comes to light, but
>  the definition remains the same.

*Any* definition could remain the same (stem, node, apomorphy, taxon-list).

What a phylogenetic systematics could do is to guarantee that a name
based in some definitions (stem, node, apomorphy) will always reffer
to a *monophyletic* taxon.

But, as far as the scientific endeavor is a never-ending one, any
phylogenetics analysis is a tentative one (it is in principle
falsifiable - or by definition, if one has in mind the popperian
system) - so the *meaning* of a phylogenetic systematics name with a
given definition will be always changing.


Roberto Takata