GaryGaulin
Posts: 5385 Joined: Oct. 2012
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Quote (N.Wells @ April 26 2014,22:21) | Quote (GaryGaulin @ April 26 2014,20:39) | In case anyone is interested in a prediction from the Theory of Intelligent Design: This paragraph from the Spark of life: Metabolism appears in lab without cells article needs to change from Quote | "I think this paper has really interesting connotations for the origins of life," says Matthew Powner at University College London. It hints at how more complex enzymes could have evolved, he says, because substances that made these early processes more efficient would have been selected for. |
to Quote | It hints at how sustainable metabolic pathways could have developed, [he says,] because of this complimenting existing evidence for a corresponding producer in a reciprocal producer/consumer relationship that is required for long-term perpetuation of metabolic systems. |
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Why should that be changed from what Powner said to the version that you wrote? |
For Darwinian theory: It's fine the way it is.
For the more predictive Theory of Intelligent Design: The word "evolved" becomes a banal and misleading generalization (Do molecules have genes that control their atomic structure?) and needs to be replaced with "developed" as well as include the detail "sustainable metabolic pathways". The phrase "selected for" suggests that "substances that made these early processes more efficient" are superior to "long-term perpetuation of metabolic systems" that is necessary or else the cycle ends after the available carbohydrate/food has been consumed. Being more efficient only consumes even faster.
Quote (N.Wells @ April 26 2014,22:21) | First, the version that Powner said makes eminent sense, while your version is not readily decipherable. |
At least what I wrote far more complete, and predictive.
Quote (N.Wells @ April 26 2014,22:21) | What does "this" refer to? |
This = The information in the paper explaining how sustainable metabolic pathways could have developed
Quote (N.Wells @ April 26 2014,22:21) | I presume you meant "complementing" rather that complimenting (although I'm getting distracted by a vision of an ATP telling an RNA, "Oh sugar, I just love what you did with pyruvate. Could you help me redo my pentose next?"). |
Yes, complement would be the proper spelling. You got me that time!
Quote (N.Wells @ April 26 2014,22:21) | And is "because this complements existing evidence" what you meant by the more awkward "because of this complimenting existing evidence"? It's unclear what the existing evidence is or why whatever "this" is is complementary to it. |
And yes "because this complements existing evidence" would be another way of saying the same thing.
Quote (N.Wells @ April 26 2014,22:21) | You don't appear to be using "consumer / producer" in their normal biological senses, so I'm guessing that you mean products and reactants in chemical reactions, but that still doesn't clarify the rest of the sentence. By the last part, I presume that you mean that bidirectional reactions are needed if metabolic systems are going to be sustained over the long term, but how does that offer hints about how metabolic pathways could have developed? - the 'because' comes across as a non sequitur. |
I did my best to keep the sentence worded like it was in the article, which used the word "because". I was able to leave that word where it was.
The metabolic producer/consumer relationship is now grade school science. In this case it's much more specific than "bidirectional reactions".
My way of wording the sentence shows what else to look for, which is easily missed by using "evolved" and "selected" generalizations. The article also mentioned "A related issue is that the reactions observed so far only go in one direction; from complex sugars to simpler molecules like pyruvate." What that source of complex sugars could be was immediately on my mind, because of theory that made an excellent answer somewhat obvious.
-------------- The theory of intelligent design holds that certain features of the universe and of living things are best explained by an intelligent cause, not an undirected process such as natural selection.
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