Uncommon Descent Serving The Intelligent Design Community

Deconstructing Avida

Share
Facebook
Twitter
LinkedIn
Flipboard
Print
Email

Back in 2003 NATURE (vol 423, pp 139-144) published an article by Richard Lenski, Charles Ofria, Robert Pennock, and Christoph Adami titled “The Evolutionary Origin of Complex Features.” The abstract reads:

A long-standing challenge to evolutionary theory has been whether it can explain the origin of complex organismal features. We examined this issue using digital organisms—computer programs that self-replicate, mutate, compete and evolve. Populations of digital organisms often evolved the ability to perform complex logic functions requiring the coordinated execution of many genomic instructions. Complex functions evolved by building on simpler functions that had evolved earlier, provided that these were also selectively favoured. However, no particular intermediate stage was essential for evolving complex functions. The first genotypes able to perform complex functions differed from their non-performing parents by only one or two mutations, but differed from the ancestor by many mutations that were also crucial to the new functions. In some cases, mutations that were deleterious when they appeared served as stepping-stones in the evolution of complex features. These findings show how complex functions can originate by random mutation and natural selection.

At no point in the paper is ID or any proponent of ID cited. Yet, when co-author Christoph Adami gave a PowerPoint presentation on Avida at a AAAS meeting some time back in Washington DC, his concluding slide showed Behe and his book DARWIN’S BLACK BOX. Moreover, Adami indicated that the whole point of this work on Avida was to refute Behe. Likewise, when co-author Rob Pennock wrote his expert witness report for the Kitzmiller v. Dover case, he claimed that his work on this NATURE article constituted a refutation of Behe.

The hypocrisy here is breathtaking. On the one hand, we are told that ID is not science. On the other hand, articles in places like NATURE appear that are clearly motivated by ID. And yet, the articles themselves are scrupulous to avoid referencing ID, its proponents, or published writings lest we gain an entry in the Science Citation Index and thus can further strengthen the case that ID is indeed science.

It was clear to the authors of the NATURE article that the shrill, illogical reviews of Behe that appeared early on would not silence him. But it was also clear to them that addressing him forthrightly in a prominent scientific venue could backfire, indicating that Behe was on to something important even if he was ultimately wrong. Some scientific mistakes are illuminating. If Behe were charged with committing an illuminating scientific mistake, then he would still be doing science (rather than pseudoscience or religion). Hence the subterfuge of not citing him at all the in NATURE article.

In any case, a thorough deconstruction of Lenski et al.’s article and of Adami’s Avida program has been long overdue. That deconstruction is now available:

Winston Ewert, William A. Dembski and R.J. Marks II, “Evolutionary Synthesis of Nand Logic: Dissecting a Digital Organism,” Proceedings of the 2009 IEEE International Conference on Systems, Man, and Cybernetics. San Antonio, TX, USA – October 2009, pp. 3047-3053.

Abstract: According to conservation of information theorems, performance of an arbitrarily chosen search, on average, does no better than blind search. Domain expertise and prior knowledge about search space structure or target location is therefore essential in crafting the search algorithm. The effectiveness of a given algorithm can be measured by the active information introduced to the search. We illustrate this by identifying sources of active information in Avida, a software program designed to search for logic functions using nand gates. Avida uses stair step active information by rewarding logic functions using a smaller number of nands to construct functions requiring more. Removing stair steps deteriorates Avida’s performance while removing deleterious instructions improves it. Some search algorithms use prior knowledge better than others. For the Avida digital organism, a simple evolutionary strategy generates the Avida target in far fewer instructions using only the prior knowledge available to Avida.

[ IEEE | pdf ]

Comments
In my prior post it is not immediately apparent that the quoted paragraph is from Uri Alon's website.
By the way, want to see Design Theory in action? Check out Uri Alon’s work. Our lab also studies topics in evolution, experimentally and theoretically. We have measured the cost and benefit of gene expression in E. coli, and demonstrated in evolutionary experiments that protein levels evolve to maximize fitness within a few hundred generations. Other studies are on the origin of modularity in biological systems based on evolution in changing environments, and on the plasticity of the input functions of genes.
hrun0815
December 11, 2009
December
12
Dec
11
11
2009
08:54 PM
8
08
54
PM
PDT
By the way, want to see Design Theory in action? Check out Uri Alon’s work.
Our lab also studies topics in evolution, experimentally and theoretically. We have measured the cost and benefit of gene expression in E. coli, and demonstrated in evolutionary experiments that protein levels evolve to maximize fitness within a few hundred generations. Other studies are on the origin of modularity in biological systems based on evolution in changing environments, and on the plasticity of the input functions of genes.
Another case of 'Design Theory' in action performed by one of those 'evolutionists'.hrun0815
December 11, 2009
December
12
Dec
11
11
2009
08:52 PM
8
08
52
PM
PDT
Nakashima, Where do Dembski and Marks say that Behe was wrong, and about what?tragic mishap
December 11, 2009
December
12
Dec
11
11
2009
08:23 PM
8
08
23
PM
PDT
It is important that no active information was smuggled into the experiment while it was running from an intelligent source, but that the rules and structure of the experimental Universe were identified as sources of active information.
This is just bizarre. If the information didn't enter the program while it was running, how on earth did the program make use of it? Have we just refuted the D&M paper?Mung
December 11, 2009
December
12
Dec
11
11
2009
05:15 PM
5
05
15
PM
PDT
Perhaps I’m being simplistic, but don’t people write computer programs to get them to do what they want them to do?
Computer simulations are a great way to demonstrate the capabilities of unguided, unintelligent, processes, such as random changes and "natural" selection. So while they may do an excellent job of showing how evolution itself is teleological, the evolutionary processes themselves, the "strategies" of evolution, quite obviously are not.
I think the problem is that ID doesn’t make any positive predictions that can be tested.
Really. So this D&M paper doesn't advance any prior ID prediction? Astounding. Why then, did they write it?Mung
December 11, 2009
December
12
Dec
11
11
2009
05:12 PM
5
05
12
PM
PDT
Dr. Dembski, thank you for your work. Please pass on our thanks to your co-authors. Now, when are we going to see that "Complete Idiots Guide to D&M Papers"? I mean, c'mon, help the critics out. By the way, want to see Design Theory in action? Check out Uri Alon's work.Mung
December 11, 2009
December
12
Dec
11
11
2009
05:02 PM
5
05
02
PM
PDT
I think the problem is that ID doesn’t make any positive predictions that can be tested. Sure it does. It claims everything with CSI is designed. Show something that has CSI and is known not to be designed and you falsify ID.tribune7
December 11, 2009
December
12
Dec
11
11
2009
04:47 PM
4
04
47
PM
PDT
"...provided that these were also selectively favoured." If I'm not mistaken, we've already extensively covered the inadequacy of computer programs to demonstrate natural selection, with the "Weasel" posts and the like. Also, Dr. Meyer covers this area in a chapter in his book, with the observation that all of the computer models have a common component - the prior inputing of information, which render them irrelevant to Darwinian selection's ability to develop and/or originate complex systems. They clearly beg the question - can complex systems develop without the prior input of specified complex information? "These findings show how complex functions can originate by random mutation and natural selection." Hardly, they demonstrate how a randomized computer program can develop pseudo-selection once the information and goal are programmed into the system by an inteligent programmer with a mind. Natural selection has the unique quality of not purposely needing to demonstrate itself. However, Darwinists have the unique quality of purposely needing to demonstrate natural selection - with a 0% success rate. The reason? If natural selection is a random process without plan or purpose, one cannot demnostrate it through a planned purposeful process. I also look forward to reading the article.CannuckianYankee
December 11, 2009
December
12
Dec
11
11
2009
04:45 PM
4
04
45
PM
PDT
Omedeto, Dr Dembski! I agree that scientific papers should be written straightforwardly to present evidence that supports or criticises specific intellectual positions, positions clearly identified by the authors. I look forward to papers from your group that actually cite Behe, even if he was ultimately wrong, as you say. I think it is important that you were able to locate active information in the choice of instruction set and the reward schedule of Avida, since these function similarly to the physics and chemistry, and the initialization - the experiment's "Big Bang" so to speak. It is important that no active information was smuggled into the experiment while it was running from an intelligent source, but that the rules and structure of the experimental Universe were identified as sources of active information. It would certainly make me cautious about drawing analogies between Avida experiments and the real world if you had found an "online" source of active information.Nakashima
December 11, 2009
December
12
Dec
11
11
2009
04:40 PM
4
04
40
PM
PDT
Science Citation Index and thus can further strengthen the case that ID is indeed science. ID is obviously science and global warming -- excuse me "climate change" and Darwinism are obviously politics and/or religion. Well done, WD.tribune7
December 11, 2009
December
12
Dec
11
11
2009
04:37 PM
4
04
37
PM
PDT
Dr Dembski:
The hypocrisy here is breathtaking. On the one hand, we are told that ID is not science. On the other hand, articles in places like NATURE appear that are clearly motivated by ID. And yet, the articles themselves are scrupulous to avoid referencing ID, its proponents, or published writings lest we gain an entry in the Science Citation Index and thus can further strengthen the case that ID is indeed science.
I think the problem is that ID doesn't make any positive predictions that can be tested. It only says that evolution can't account for A, B and C. And then it turns out that evolution actually can account for A, B and C. And then ID says, but it can't account for D, E and F. And so on. Until ID makes some useful predictions, it's no wonder that scientists treat ID as a joke.IrynaB
December 11, 2009
December
12
Dec
11
11
2009
04:16 PM
4
04
16
PM
PDT
Congratulations again, Dr Dembski, et alUpright BiPed
December 11, 2009
December
12
Dec
11
11
2009
04:00 PM
4
04
00
PM
PDT
Dear Dr. Dembski, congrats on your new paper. Just two quick annotations to your references: This is the fourth paper in a row in which the title of S. Christensen's and F. Oppacher's paper What can we learn from No Free Lunch? A First Attempt to Characterize the Concept of a Searchable Function got mutilated (by dropping the word function). And you are referencing your paper The Search for a Search: Measuring the Information Cost of Higher Level Search. Now, I understand some of your troubles with the delayed publication of this paper, as the Vol. 3, No. 4, 2008 of International Journal of Information Technology and Intelligent Computing (infact the whole years) seemingly hasn't appeared yet...DiEb
December 11, 2009
December
12
Dec
11
11
2009
03:53 PM
3
03
53
PM
PDT
Eric Anderson has written an excellent essay on Avida: Bits, Bytes and Biology: What Evolutionary Algorithms (Don’t) Teach Us About BiologyGilDodgen
December 11, 2009
December
12
Dec
11
11
2009
03:44 PM
3
03
44
PM
PDT
Dr. Dembski, congratulations on yet another published paper. You and Dr. Marks are on a roll. I look forward to reading it. kibitzer:
Perhaps I’m being simplistic, but don’t people write computer programs to get them to do what they want them to do?
Not always. There are several branches of experimental science in which people write programs to see what they'll do. The degree to which Avida fits this description is disputed.R0b
December 11, 2009
December
12
Dec
11
11
2009
03:28 PM
3
03
28
PM
PDT
Mark Frank,
An article on astronomy might well be motivated by a desire to refute the claims of astrologers. It does not follow that astrology is science or that it would be appropriate to refer to astrology in the article.
It would be perfectly appropriate to refer to astrology and astrologers in an article, if that was what indeed motivated the article. But, really, your analogy begs the question. You have to assume from the outset that ID is not scientific, and then make this kind of analogy. But clearly, since the article referred to here does attempt to falsify or refute ID, then the dismissal of ID as being unscientific on the grounds that it cannot be refuted or falsified cannot stand. We have to actually get into the "gasp!" merits of the argument itself. But within those merits, to scrupulously avoid your real intention, lest your opponent be credited, is underhanded, and in my humble opinion, rather weasely.Clive Hayden
December 11, 2009
December
12
Dec
11
11
2009
03:01 PM
3
03
01
PM
PDT
Congratulations guys! Good to see this available!Atom
December 11, 2009
December
12
Dec
11
11
2009
02:49 PM
2
02
49
PM
PDT
Let's be frank... Hey. Wait a minute...Uvula Presley
December 11, 2009
December
12
Dec
11
11
2009
02:38 PM
2
02
38
PM
PDT
Mark Frank: How many articles in NATURE or SCIENCE have you seen lately (like the in last 100 years) that refute astrology in the name of astronomy? And did any of them beat around the bush by not naming "astrology" explicitly even though that was their target? Your analogy strikes me as ludicrous.William Dembski
December 11, 2009
December
12
Dec
11
11
2009
02:38 PM
2
02
38
PM
PDT
The hypocrisy here is breathtaking. On the one hand, we are told that ID is not science. On the other hand, articles in places like NATURE appear that are clearly motivated by ID. And yet, the articles themselves are scrupulous to avoid referencing ID, its proponents, or published writings lest we gain an entry in the Science Citation Index and thus can further strengthen the case that ID is indeed science. An article on astronomy might well be motivated by a desire to refute the claims of astrologers. It does not follow that astrology is science or that it would be appropriate to refer to astrology in the article.Mark Frank
December 11, 2009
December
12
Dec
11
11
2009
02:27 PM
2
02
27
PM
PDT
Congratulations on this paper Dr. Dembski and I also look forward to reading it. Its worth noting that Michael Behe publish Darwin's Black Box in 1996. One of the claims he made in the book was that there was not one, single research research study in any peer reviewed scientific journal that provided a detailed, testable model of how evolution constructed any of the IC systems he discusses in the book. Lo these 13 years later and that is still the case. However, I have seen the Avida study cited quite often when I asked for such a citation, as the only such study. How ironic!DonaldM
December 11, 2009
December
12
Dec
11
11
2009
02:15 PM
2
02
15
PM
PDT
Right now, there are "grumble grumble" mouse-potato back benchers pouring over this article seeking ways to spin it negatively. What a strange and curious world they live in. Congratulations Dr. Dembski et al. I look forward to reading this in detail.Uvula Presley
December 11, 2009
December
12
Dec
11
11
2009
01:32 PM
1
01
32
PM
PDT
Perhaps I'm being simplistic, but don't people write computer programs to get them to do what they want them to do? Avida is an example of design. It's a sad commentary on the state of learning that we need detailed refutations of this nonsense.kibitzer
December 11, 2009
December
12
Dec
11
11
2009
01:28 PM
1
01
28
PM
PDT
1 2

Leave a Reply