On 26/01/2009, at 7:38 AM, [email protected] wrote:
>
>> Empirical observations of patterns occurring within a limited scope  
>> can
>> shed no light on the state of things outside that scope.
>
> If you really believe that, then you would throw most of evolutionary
> theory out, beause we've only been making good scientific  
> measurements over
> a very limited scope of time, say the last 150-200 years.

Given that it's the 150th anniversary of the publication of The Origin  
this year, and that built on a couple of decades of research by  
Darwin... Most of evolutionary theory was built in the last 100 years,  
once the mechanism of heredity was worked out and the statistical  
tools were developed to actually test Darwin's ideas. You would not  
throw out "most of evolutionary theory" at all, by your criterion.

Really, it's amazing how much of what most people think they know  
about biological science, particularly evolutionary biology, is  
completely wrong.

Fossil record, for example. It's nice that the fossil record is there  
and is so detailed, but it's entirely superfluous to evolutionary  
theory. There are nice overlaps, but evolutionary theory explains the  
fossil record, not the other way round. (Most of the great discoveries  
of dinosaurs, marine reptiles etc were in the late 1800s, again after  
the publication of Origin). If we had no fossil record at all, it  
would have made virtually no difference to the development of  
evolutionary theory, and yet evolution by natural selection is one of  
the best supported scientific theories - if it was going to have  
serious weaknesses it would have failed long before now.

Evolution underpins the whole of biology. Nothing makes sense without  
it, and every single time we ask "what would this looks like if  
evolution were true", that's what we find. And Natural Selection is  
the one of the most elegant ideas in science, right up there with  
elliptical orbits and laws of motion. But despite that, it's viewed as  
a soft science, or worse, a trivially easy one. Being able to recite  
the soundbyte "survival of the fittest" and mumble something about  
variation of hereditary characters doesn't mean that one understands  
the implications. That's why it's a degree level subject, it's why I  
spent 4 years doing very little else (British degrees being much more  
focused than US ones, f'rex). One simply can't get to the same level  
of understanding if you're not living and breathing it.

This is why I tend to stay out of physics discussions, 'cause I know  
how little I know, and reading A Brief History Of Time doesn't make me  
an expert.

Charlie.
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