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- From: John Wilkins <john@publications.ccc.monash.edu.au>
- Subject: Re: Popper and Abian and other matters
- Message-ID: <1992Nov17.022553.18928@monu6.cc.monash.edu.au>
- X-Xxmessage-Id: <A72EA37066012434@manager.ccc.monash.edu.au>
- X-Xxdate: Tue, 17 Nov 92 21:26:08 GMT
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- Organization: Monash University, Melbourne Australia
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- References: <1992Nov10.004237.50028@Cookie.secapl.com>
- Date: Tue, 17 Nov 1992 02:25:53 GMT
- Lines: 44
-
- In article <1992Nov10.004237.50028@Cookie.secapl.com> Frank Adams,
- frank@Cookie.secapl.com writes:
- >The main content of evolutionary theory is that *random* mutation is the
- >only input to this process. So another sense of "survival of the
- fittest"
- >is a negative one: survival of the fittest is the only thing driving
- >evolution. This would not be true, for example, of Lamarckian evolution.
-
- A point of clarification:
-
- "Recent" evolutionary biology (post-synthetic) admits of several
- different inputs to evolution: drift, non-genetic heredity, and so forth.
- I think the point is that the variation that results has to be random
- with respect to the selection pressures active on a population (is that
- the point of your scare quotes?)
-
- My $1/50th worth: Sober has argued that fitness is a supervenient
- property that sums the total vector propensity of a trait (or gene) in a
- given selective environment. It is, in other words, a statistical,
- stochastic and probabilistic measure. It neither requires nor allows
- non-natural selection in a purely Darwinian evolutionary process, and to
- that extent, Darwinism *is* tautological -- it is definitionally true
- that if a process of populational hereditable change over time has only
- fitness as a relevant proprty contributing to the continuation of traits
- (genes, etc), it is Darwinian. If not, it isn't. [A Lamarckian process
- could be partly Darwinian, for example.]
-
- A terminological suggestion (to avoid emotive displays): a process that
- results in the (qualified as above) survival of the most fit is a
- "D-process". One that results in the survival of the most desired (ie, an
- intentionally driven process) is an "L-process"; one attracted to a goal
- of excellence is a "T-process" (Teilhardian, see Rescher's 1990 book _A
- Useful Inheritance_); and one driven by an entelechical unfolding of
- pre-existing form, a "B-process" (Bergsonian -- if you don't follow this
- last, don't worry about it). So far as I can ascertain, this exhausts the
- evolutionary process spectrum.
-
- John Wilkins
- Manager, Publishing & Advertising
- Monash University, Melbourne Australia
- Internet: john@publications.ccc.monash.edu.au
- Tel: (+613) 573 2099
- --Monash and I agree on several matters: this may, or may not, be one of
- them
-