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To: DittoJed2
Noli Illegitimi Carborundum.
Mechanisms exist within cells that correct various mutations. This can be demonstrated by a stretch of DNA associated with Vitamin C and used as an argument for the common descent of humans and other primates. The peculiar thing about this DNA stretch is that there are regions within it that have absolutely no mutations amongst animals that have been separated by over 50 million years(or 100 million both way years). That range of time is nearly 10 percent of the time since "complex" animals first appeared on the earth. This indicates that whatever causes the fidelity of those regions is a reliable process. The point being there is a reliable process that limits change.
1,798 posted on 08/21/2003 6:47:53 AM PDT by AndrewC
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To: AndrewC; All
Darwinists Fumble on the Evolution of Complex Structures 08/20/2003

If Ronald Reagan had said, “communism isn’t working,” it would not be news. But when Gorbachev said, “communism isn’t working,” it was history book material. Similarly, when Darwinists writing in a Darwinist-friendly scientific journal say that evolutionary theory isn’t working to explain one of the most important problems that had stumped Darwin, it is an occasion that should arouse the world news media for a press conference, replete with anxious reporters asking hard-hitting questions. Yet you probably will not hear about it except right here; the admission is hidden away in a Dispatch in the Aug. 19 issue of Current Biology (emphasis added in all quotes):

"A central goal of evolutionary biology is to explain the origin of complex organs – the ribosomal machinery that translates the genetic code, the immune system that accurately distinguishes self from non-self, eyes that can resolve precise images, and so on. Although we understand [sic] in broad outline how such extraordinary systems can evolve by natural selection, we know very little about the actual steps involved, and can hardly begin to answer general questions about the evolution of complexity. For example, how much time is required for some particular structure to evolve?"

In their article, Nick Barton and Willem Zuidema (Univ. of Edinburgh, where Darwin attended for awhile), admit that traditional biological approaches (like population genetics) for explaining the evolution of complex structures have not worked:

"Complex systems – systems whose function requires many interdependent parts are vanishingly unlikely to arise purely by chance. Darwin’s explanation of their origin is that natural selection establishes a series of variants, each of which increases fitness. This is an efficient way of sifting through an enormous number of possibilities, provided there is a sequence of ever-increasing fitness that leads to the desired feature. To use Sewall Wright’s metaphor, there must be a path uphill on the ‘adaptive landscape.’"

"The crucial issue, then, is to know [sic] what variants are available – what can be reached from where – and what is the fitness of these variants. Is there a route by which fitness can keep increasing? Population genetics is not much help here. Given the geometry defined by mutation and recombination, and given the fitnesses, we can work out how a population will change, simply by following the proportion of different types through time. But understanding [sic] how complex features evolve requires plausible models for the geometry of the adaptive landscape, which population genetics by itself does not provide."

The authors point to artificial life models like those of Lenski and Adami to provide some hope for a solution to the evolution of complex structures. They describe some of the apparently complex functions that “digital organisms“ arrived at, when set free to evolve in simulations according to simple rules designed into the program. Though encouraged by these, Barton and Zuidema are not entirely impressed:

"Artificial Life models such as Lenski et al.’s are perhaps interesting in themselves, but as biologists we are concerned here with the question of what Artificial Life can tell us about real organisms. The difficulty in answering this is that much work in this field is rather isolated from traditional evolutionary biology."

While hopeful that synergy between biologists and computer programmers might provide mutual insights, they have doubts that the computer organisms have any connection to the real world.

"In population genetics and evolutionary game theory, we design models to study the success and failure of a predefined set of traits or strategies in the struggle for life. But what are the possible traits? And how well do they succeed in particular environments with particular competitors? These questions are ignored in traditional models – they come in as parameters to be provided by developmental biology and ecology. For understanding the evolution of complex traits this is not satisfactory, because these parameters are themselves shaped by evolution [sic]. Evolutionary processes constantly shift the targets of evolutionary optimization [sic], create spatial patterns, turn competitors into mutualists and create new levels of selection. Artificial Life models of such phenomena ... promise to be useful for developing the concepts and techniques to deal with that challenge, but only if they are combined with the insights from almost a century of population genetics."

The Dispatch is entitled, “Evolution: the erratic path towards complexity,” by Nick Barton and Willem Zuidema. If you have sifted these statements for any evidence for evolution, or realistic explanations for the evolution of any single complex system, you have undoubtedly found all chaff and no grain. It’s all emptiness and futility, wishful thinking, models that are too complex to relate to the real world, leaning on broken reeds, trusting in others’ work that never gets delivered, and vaporware on back order. Yet this is the theory that is so obviously a fact that anything else is pseudoscience that must be shielded from students? This is the greatest idea anyone ever had, so intuitively obvious that it has taken over the world as the encapsulation of all that is certain about nature? This is the theory that should no longer be called a theory, but a fact like gravity?

We hasten to make clear that Barton and Zuidema are evolutionists, and did not write this article to in any way claim that they doubt Darwinian evolution. But that is what makes their admissions so damaging. If Henry Morris had said this, no one would pay attention, because he (presumably) has an axe to grind and an ulterior motive. But these guys just gave away the store. They admitted that after all these years, the Darwinists are no nearer to explaining the origin of an eye, or dolphin sonar, or butterfly wings, or immune systems, than Charlie himself was in 1859.

Notice how they look yearningly, hopefully to the computer programmers to provide some relief to the befuddled population geneticists (with their crude models built partly on the personification fallacy of game theory), but then turn right around and criticize the programmers for not being realistic, and ignoring the “insights from almost a century of population genetics.” It’s like a cartoon character in quicksand calling another guy in the same quicksand for help. Does anyone see anything solid that any evolutionist is standing on, that should give Eugenie Scott of the NCSE confidence in the righteousness of her crusade to keep evolution the sole contender in the public schools? The arrogance of the Darwin Party, given admissions like this one, is astounding.

Barton and Zuidema claim that biologists understand evolution in broad terms, just not in the details. But they cannot even begin to point to any plausible series of steps on the fitness landscape that would allow a mindless organism to climb uphill to an adaptive peak – to evolve an eye, or a brain, an immune system, or any other complex feature, when every step in the imaginary sequence (for which there is no fossil evidence) would have had to provide enough survival value to make it triumph over all competitors, such that every organism without the lucky trait would have died out (this is called the “cost of selection”). They admit these complex systems are extraordinary. They admit they are irreducibly complex (in their words, “systems whose function requires many interdependent parts”). They admit that the probability of getting any complex system by chance is vanishingly small. They admit Darwin’s explanation, to be efficient at sifting through the enormous possibilities, is provisional on the requirement for a sequence of plausible intermediates each one increasing the fitness of the organism (but how efficient can that be when there is slippage on the treadmill due to indirect genetic effects?) They are utterly clueless how long it would be expected to take for the “slight, successive modifications” to add up to a complex system. And yet complex systems are the rule in biology, not the exception! (See today’s headline on sponges for an interesting example.) They claim they understand the broad outline of how such “extraordinary systems could evolve by natural selection,” then two phrases later, they admit “we can hardly begin to answer general questions about the evolution of complexity.” About face! (Speaking about faces, they are pretty complex systems, too.)

We joke about car engines held together with glue, rubber bands and popsicle sticks. Darwinism is like a shiny sports car advertised to the world as the hottest thing since religion went out of style. Just don’t lift up the hood.

From here: Darwinists Fumble on the Evolution of Complex Structures

Enjoy! ~MM

1,808 posted on 08/21/2003 8:14:51 AM PDT by Michael_Michaelangelo
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