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Author Topic:   Pre-Evolution Evolution....
cavediver
Member (Idle past 3663 days)
Posts: 4129
From: UK
Joined: 06-16-2005


Message 16 of 19 (275117)
01-02-2006 7:14 PM
Reply to: Message 15 by RAZD
01-02-2006 4:18 PM


Re: First, what is "life" eh?
The question is, though: how would it reproduce?
Oh, that's easy! Surely you've seen Demon Seed?

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Ben!
Member (Idle past 1418 days)
Posts: 1161
From: Hayward, CA
Joined: 10-14-2004


Message 17 of 19 (275133)
01-02-2006 8:29 PM
Reply to: Message 4 by ohnhai
12-29-2005 11:36 PM


Re: First, what is "life" eh?
Gee guys, hate to be the buzz-kill party-pooper and actually make an on-topic comment...
...in all honesty the line that we describe as the beginning of evolution and by inference ”life’ is almost totally arbitrary.
I take it by implication that you find this surprising or not well recognized. I might remind you at this point that you're using a very specific, scientific definition of "life".
But I agree. The line between "life" and "not-life", in the terms that you're using, is not so great.
...it would be virtually impossible to pin the exact point between life and non-life, and thus the difference between evolution and evolution like processes.
Evolution, in it's more general sense (not mutation / natural selection, but reproductive change and environmental pressure / selection), could be said to operate on non-life. I think it's an unnecessary distinction.
Ben

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cavediver
Member (Idle past 3663 days)
Posts: 4129
From: UK
Joined: 06-16-2005


Message 18 of 19 (275259)
01-03-2006 6:13 AM
Reply to: Message 7 by RAZD
01-01-2006 9:42 AM


Re: First, what is "life" eh?
This kind of leaves stars in the fuzzy "pre-life structures" category, although they would qualify as replicators.
I think that is fair. What is ironic is that ID chose Evolution rather than stellar evolution as their target for divine design. Stellar evolution stinks of it where-as Evolution is just a soggy biological mess

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Omnivorous
Member
Posts: 3983
From: Adirondackia
Joined: 07-21-2005
Member Rating: 7.0


Message 19 of 19 (278561)
01-12-2006 11:04 PM
Reply to: Message 4 by ohnhai
12-29-2005 11:36 PM


Abiotic Parents
ohnhai writes:
Expecting self-replicators to appear in a single bound is not how we know the natural world to work. What we expect is lots of small improvements over a long period of time, but how can that happen if the things we expect to see an improvement in can’t themselves replicate (with error)? If they cant duplicate them selves how do they preserve any incremental change?
Perhaps the first set of incremental changes occurred in the progenitor non-life reactions, a second set in non-replicating products, and a third by replicating life.
It seems reasonable to suggest that as the earth aged, the surface became more chemically complex. Over the abiotic ages, both the possible number of chemical interactions and the complexity of the environment in which they occurred increased. Energy poured into that thin planetary skin where life would be concentrated.
In time, products arose that facilitated the process which created them; that process might then "out-compete" other resource-consuming processes.
Then a membrane, bubble, or pocket that contained both the progenitor process and its useful product would be another step closer to life.
The step to full self-replication could be asexual, "accidental" reproduction via mechanical splitting, spilling; perhaps budding would be the next step.
An internal, "genetic" means of reproduction wouldn't be necessary to allow selection to operate: the "soggy" nature of the necessary environment would assure many slight differences (impurities) between similar processes/products.
So, yeah, I guess it seems fair to say that non-life must have evolved before life could, in some sense, though I'd call it the natural history of increasing complexity, rather than evolution--at least until some reproducers were outcompeting others.

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What I refuse to accept is your insistence that your beliefs about your beliefs constitute evidence in support of your beliefs.

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