Re: [asa] Definition of evolution

From: Murray Hogg <>
Date: Sun Nov 01 2009 - 16:33:43 EST

Hi Bill,

Just on the below;

Bill Powers wrote:
> It seems, however, that biological evolution, in order to encompass the
> salient features of the data, ought to prescribe that the change takes
> place over a "long" period of time.

I understand the point you're making here, but I think it needs nuance. In particular, it doesn't account for the fact that very small changes can happen (indeed, at the DNA level, must and do happen) very quickly.

So rather than speaking of "change over a 'long' period of time" one ought to speak of "accumulation of successive small changes over a 'long' period of time"?



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Received on Sun Nov 1 16:34:01 2009

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