DrTorch Wrote:While no flaws with the experiments are obvious, what is this person trying to conclude?
That's where the vigorous debates usually occur.
You rightly point to a good question, what is "fit". One issue is that term is often presented tautologically.
The experiment has published dozens of papers, so I don't think there is any one thing that can be pointed to as the intended conclusion. However, it seemed that they wanted to be able to see what they call microevolution in action. They concluded that chance has an enormous impact on evolution, based on the fact that the 12 populations that they started with (which were all clones of the each other originally) evolved to different sizes and fitness levels, and the fact that they saw periods of rapid evolutionary change and stasis.
The above conclusions are what I tried to get out of the paper here:
http://myxo.css.msu.edu/lenski/pdf/1994,...visano.pdf but it is very possible that I had misinterpreted it.
As far as I can tell, fitness is measured by taking part of the latest generation, mixing it with the starting generation and figuring out the populations' growth rates.
My conclusion from the above paper is that evolution and natural selection do exist. The gradual increase in fitness and cell size meshes really well with what is predicted by evolutionary theory. I will admit that it is not rock solid proof, but when combined with knowledge of breeding practices and evolutionary algorithms, it helps create a compelling case that life evolves and adapts to its environment through a process in which genes that allow an organism to have more offspring eventually become prevalent in the population.
I would like to apologize for derailing the topic. To get back on topic, I feel that the creator of an idea is irrelevant to the truth of the idea. One of the first steps in the scientific method is to create a hypothesis. I would be surprised if Darwin
wasn't looking for evidence of evolution and just approached the question without any biases as to the likely answer. However, I don't believe in evolution because Darwin did; I believe in it because the vast majority of the scientific community, representing all biases, political persuasions, and fields, believe in it, and for many, it is essential to their research. Additionally, I find evidence of evolution in many things in the world around me and generally believe that the idea is a fairly logical conclusion from what we know about hereditary.
Of course, if we really want to talk about the creator the idea of evolution, we should be talking about Anaximander. He preceded Darwin by a couple thousand years.