@prothero,
prothero;86973 wrote:Pathfinder and Richrf
Exactly what is it about the general scientific theory of evolution that you are objecting too?
-that higher organisms have evolved from lower organisms over time?
-that there are genetic variations between generations?
-that some variations are more able to survive and reproduce than others?
the details are debatable and still being debated, the exact origins of and ancestors to humans and other species are not known but what about the general theory do you object to?
Quantum mechanics and discussions of determinism or purpose are not part of the general theory.
Professor Dawkins assertions about the blind watchmaker and God delusion are not part of the general theory.
What is your detailed or even general objection to evolution as a concept for the origins of life and biological diversity?
This is my problem:
Here is your formulation of the theory:
-that higher organisms have evolved from lower organisms over time?
-that there are genetic variations between generations?
-that some variations are more able to survive and reproduce than others?
Here is a previous formulation:
1) Living things reproduce themselves.
2) The reproductions are not perfect - there is always variation.
3) Some variations are better at surviving in the organisms environment than others.
Here is another definition:
The Questions | The BioLogos Foundation
Specifically, biological evolution refers to the development of ancestral species into current diverse species.1 The slow process of evolutionary development comes about through changes in DNA, or mutations, which fundamentally change the biology of the organism. When those changes are favorable to survival, they are preserved. If a population of some species undergoes a substantial number of such changes - and is geographically isolated from other related populations - a new species may appear.
And yet another, more expansive:
Modern evolutionary synthesis - Wikipedia, the free encyclopedia
The modern synthesis bridged the gap between experimental geneticists and naturalists, and between both and palaeontologists. It stated that:
[20][21][22]
- All evolutionary phenomena can be explained in a way consistent with known genetic mechanisms and the observational evidence of naturalists.
- Evolution is gradual: small genetic changes, recombination ordered by natural selection. Discontinuities amongst species (or other taxa) are explained as originating gradually through geographical separation and extinction (not saltation).
- Selection is overwhelmingly the main mechanism of change; even slight advantages are important when continued. The object of selection is the phenotype in its surrounding environment. The role of genetic drift is equivocal; though strongly supported initially by Dobzhansky, it was downgraded later as results from ecological genetics were obtained.
- The primacy of population thinking: the genetic diversity carried in natural populations is a key factor in evolution. The strength of natural selection in the wild was greater than expected; the effect of ecological factors such as niche occupation and the significance of barriers to gene flow are all important.
- In palaeontology, the ability to explain historical observations by extrapolation from micro to macro-evolution is proposed. Historical contingency means explanations at different levels may exist. Gradualism does not mean constant rate of change.
The idea that
speciation occurs after populations are reproductively isolated has been much debated. In plants, polyploidy must be included in any view of speciation. Formulations such as 'evolution consists primarily of changes in the
frequencies of alleles between one generation and another' were proposed rather later. The traditional view is that developmental biology ('
evo-devo') played little part in the synthesis, but an account of
Gavin de Beer's work by
Stephen J. Gould suggests he may be an exception.
[23]
And then there yet another expansive definition, here which I will not paste in this thread:
Evolution. Who is Evolution? What is Evolution? Where is Evolution? Definition of Evolution. Meaning of Evolution.
And as I keep looking for a clear definition, the more I am convinced there isn't any. There seems to be a clear consensus that this is the most important theory - but about what?
With this kind of mushiness, I cannot describe, research, discuss, challenge assertions, or discern any practical
benefit from the theory. It seems to be a general umbrella under which ideas, observations, speculations, etc. can hide under as
being part of a theory. In some cases, these speculations are declared to be facts. In some cases, I find them to be very nice stories with no way to prove, disprove, or even understand how they fit into any theory.
I would compare the situation to that of the Ptolemaic model of the universe, which was just getting more and more complicated, and needed a general house cleaning as provided by the Copernican model.
For me, Evolutionary Theory it is a mess and all kinds of claims can be made underneath the umbrella without any way to agree or refute. It seem like anything goes.
I realize that scientists try hard to defend the basis for all of their work, but for the life of me, I don't even know what they are defending. It is like a water. It takes the shape of the vessel, however one wishes to formulate the vessel.
Rich
---------- Post added 08-30-2009 at 09:55 PM ----------
Aedes;87008 wrote: But man it's interesting, complex, endlessly nuanced, and it's sure worth more than a dismissive wave of your hand -- whatever you believe.
I agree it is all of the above. And I said I find it fascinating. However, there are practical everyday issues that evolve when someone takes some idea, sticks it underneath the umbrella of Evolutionary Theory, then pulls it out from the other end as a fact, and then seeks to use these
facts in order to impose some newfangled idea on the rest of the population.
There is too much black-box magic going on here for my taste and not necessarily with the best of intentions.
Rich