Register | Sign In


Understanding through Discussion


EvC Forum active members: 65 (9164 total)
4 online now:
Newest Member: ChatGPT
Post Volume: Total: 916,914 Year: 4,171/9,624 Month: 1,042/974 Week: 1/368 Day: 1/11 Hour: 0/0


Thread  Details

Email This Thread
Newer Topic | Older Topic
  
Author Topic:   What IS evidence of design? (CLOSING STATEMENTS ONLY)
Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 9.2


Message 281 of 377 (608495)
03-10-2011 4:57 PM
Reply to: Message 277 by Taq
03-10-2011 4:03 PM


So why is that particular amino acid charged onto that particular tRNA? I think that's what he's getting at. And that IS arbitrary, at least to some degree.

This message is a reply to:
 Message 277 by Taq, posted 03-10-2011 4:03 PM Taq has replied

Replies to this message:
 Message 282 by Taq, posted 03-10-2011 5:10 PM Dr Jack has replied

Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 9.2


Message 283 of 377 (608500)
03-10-2011 5:53 PM
Reply to: Message 282 by Taq
03-10-2011 5:10 PM


No. If you read the last post you responded to he's saying that the codon-amino acid link is arbitrary. Which is it. The process is physical, yes, but you can't explain the coding itself in such simple terms.

This message is a reply to:
 Message 282 by Taq, posted 03-10-2011 5:10 PM Taq has replied

Replies to this message:
 Message 294 by Taq, posted 03-11-2011 11:38 AM Dr Jack has replied

Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 9.2


Message 295 of 377 (608570)
03-11-2011 12:09 PM
Reply to: Message 294 by Taq
03-11-2011 11:38 AM


I agree that genetic processes work by chemistry, and the functioning of genes is intimately bound to their chemical properties; if you recoded genes into some other media they flat wouldn't work because a great many of the products bind DNA or rely on properties of the RNA intermediate to correctly splice, etc. But the actual amino acid codings? They're arbitrary.
Okay, so C binds to G and A to T, right? Why? Because of a physical interaction between the two. You couldn't have a DNA system in which C binds to T instead.
But the sequence AUA doesn't have a direct physical relationship to Isoleucine. In order to associate the two you need a tRNA with the right anti-codon; but that tRNA association could be different. It could be Methionine. That's not a theoretical assertion, btw, we know it to be true because that's one of the differences in nuclear/mitochondrial gene coding.
So the coding itself is not a physical certainty; it's a convention.

This message is a reply to:
 Message 294 by Taq, posted 03-11-2011 11:38 AM Taq has replied

Replies to this message:
 Message 296 by Taq, posted 03-11-2011 12:50 PM Dr Jack has not replied

Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 9.2


Message 326 of 377 (608650)
03-12-2011 7:24 AM
Reply to: Message 299 by slevesque
03-11-2011 3:49 PM


It's just like ink on paper. Sure there are physical itneractions between the ink and the paper, and this is why the molecules stay there etc. But the disposition of the molecules were arbitrary, and if a given disposition (a letter) carries any more information then another (a scribble) is strictly because we have all established an arbitrary code in which we decide that such a pattern means such and such, and that other pattern means nothing.
It's not like ink on paper. You could - at a push - perhaps argue it's like electrons in a processor. Ink on paper produces no direct effects anywhere; photons bounce off it and we, eventually, decode those into meaning. DNA interacts chemically and physically with proteins and RNA.
Coded information only exists if their is a semantic aspect to it, without any code it has no information at all.
Thinking of genetics as information, especially information without a strict formal definition, is rarely useful.
It is the same thing with DNA. Somewhere along the line from none-life to life, a code was established either via randomness, via an as-of-yet-unknown natural process, or via an intelligent being. But it wasn't because of any particular physical interaction.
With the proteins it seems to be different. It has information strictly because 'the key physically fits the hole', and this information comes from a real physical basis.
No, it's not different. The DNA interacts with other molecules. That interaction produces changes in the surrounding environment. It's physical all the way down. The encoding in DNA is semantically flexible, as we analyse it, but in the cell the exact same chemical processes that drive protein-protein, protein-lipid or protein-ion interactions are involved in protein-DNA interactions.
No special explanation is required for DNA interactions that is not required for protein-protein interactions.

This message is a reply to:
 Message 299 by slevesque, posted 03-11-2011 3:49 PM slevesque has not replied

Replies to this message:
 Message 330 by havoc, posted 03-12-2011 11:20 AM Dr Jack has replied

Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 9.2


Message 340 of 377 (608668)
03-12-2011 12:41 PM
Reply to: Message 330 by havoc
03-12-2011 11:20 AM


So are you saying that the nucleotides have an affinity to each other or Condons to each other or the amino acids to each other.
No that's not what I'm saying. What I'm saying is that the process by which proteins are produced from DNA sequences is entirely a physical/chemical process. There is nothing special about it.
How do you explain that different condons code for the same amino acid?
It's mostly explained by "wobble" in the third base. You realise there are less tRNA types than amino acids, right?
Or in other words it is the code that gives them meaning not chemical properties of the DNA.
I'm very dubious of the notion that DNA has "meaning" outside of our interpretation of it. DNA certainly encodes proteins and when interacting with the correct cellular setup will produce proteins but does that mean it has "meaning"? I'm not so sure. And, if it does, that meaning is certainly not something extra on top of the physical interactions that needs explaining.

This message is a reply to:
 Message 330 by havoc, posted 03-12-2011 11:20 AM havoc has not replied

Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 9.2


Message 342 of 377 (608670)
03-12-2011 12:44 PM
Reply to: Message 334 by havoc
03-12-2011 11:33 AM


havoc writes:
Are you aware that many (most) secular scientists think that genetics is best understood in the terms of information?
Funny that in all the time I've spent studying and reading books on genetics; the only time I've come across anyone saying anything of the sort is when talking to Creationists.
I assure you, while Information Theory - which is categorically not the same thing as the layman's idea of what information is - is relevant to some areas of genetics, it is not viewed by scientists as the best was to understand genetics. Or, if it is, they're doing a damn good job of hiding it.

This message is a reply to:
 Message 334 by havoc, posted 03-12-2011 11:33 AM havoc has not replied

Replies to this message:
 Message 348 by Wounded King, posted 03-12-2011 1:27 PM Dr Jack has seen this message but not replied

Dr Jack
Member
Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 9.2


(1)
Message 362 of 377 (608735)
03-13-2011 7:04 AM


Summary
After 360 posts, and a fair amount of diversion, we're left pretty much where we started: without knowing the designer and their methods we are unable to distinguish design.
ID proponents seek to use design to evidence God but their method fails because without showing God they are unable to provide credible evidence for design.

Newer Topic | Older Topic
Jump to:


Copyright 2001-2023 by EvC Forum, All Rights Reserved

™ Version 4.2
Innovative software from Qwixotic © 2024