RES:Positivism vs Realism Now: The metaphysics of time
termites at USP.BR
Sat Dec 13 13:33:13 CST 1997
Thomas Schlemmermeyer - Universidade de S=E3o Paulo
Caixa Postal 276
14001-970 Ribeir=E3o Preto, SP, Brasil
favourite links: http://www.usp.br/sibi
Hello out there, these discussions are all very amazing and fascinating. =
like it very much to participate in this selected, exclusive circle.
As I already mentioned in one of my previous messages, I am a beginner =
seriously interested to understand it all;
I am now on the point to make the jump from Hennig to cladistics,=20
I already understood somehow that, while Hennigists look for =
synapomorphies, cladists look a little bit more for homologies.
And there comes in Richard=B4s statement:
To the extent
that your assumption that metaphysics HAS a place in science, you are
handicapping yourself with a burdensom circularity.
I am indeed very busy to avoid all burdensome circularities!
All these concepts of Hennig with rooted trees, monophyletic groups and =
synapomorphies are closely linked to separation events that ocurred =
The trees grow from the bottom to the top passing through the magic wall =
I think the first scientist who made a phylogenetic tree of this type =
was the german
Ernst Haeckel in the 19th century.
However as cladists mix it alltogether (ingroup and outgroup) and make =
afterwards (by paleontological or ontological criteria), I wonder a =
little bit, wether it
is still all right to travel with Hennig=B4s baggage (monophyletic =
groups, synapomorphies and the magic wall of time).
Could my baggage maybe far more light without this stuff? And is it =
someday we will abandon this rooting procedures alltogether and work =
with unrooted trees only?
(The magic wall of time than may transform into a magic floor of time)
OK, these are my modest questions of a learning new-comer,
Yours Thomas =20
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