Defending Evolution from ID Distortions

Posts tagged “Bias

Darwin’s Dilemma: My Take on the Discovery Institute’s Claims

I know it’s several months late, but I just got through watching a film done by the Discovery institute, on the Cambrian “explosion,” called “Darwin’s Dilemma: The Mystery of the Cambrian Explosion.” There are a few details that should be addressed about it. But, before I go into any kind of detail, yes, it should be pointed out that this is mostly the same kind of Creationist bull that I thought it would be, just a bit more sophisticated than the usual Creationist arguments made about the Cambrian radiation.

At first, typical of Creationist claims, Jonathan Wells makes the well-worn claim about life forms before and during the Cambrian. He compares the entire 3.8 to 4 billion years of life to a twenty-four hour day saying that for the first 21 hours, there were only unicellular life forms, and then the Cambrian life forms came into existence on the scale of a two minutes. This is an attempt to make the Cambrian radiation appear “sudden” A few minutes later, Wells then says something on the lines of that it could have happened over night which is complete bogus because it lasted at least 10 to 25 million years. Though there are higher estimates that go as high as 35 million years or more. The film says that fossil evidence shows that those estimates are too high, but it doesn’t give convincing details.

The film, however does mention the existence of other life forms, like the Ediacaran fauna which existed before the Cambrian, as well as fossil embryos. . . . Oh, about the fossil embryos, the film uses them to address the idea that pre-Cambrian fossils are not preserved because they were too soft. It is pointed out that these embryos were from soft-bodied organisms, and that they existed tens of millions of years before the Cambrian. From that, it is reasoned that if the appeal to pre-Cambrian organisms being too soft for preservation cannot be used. As the film argues this, the Discovery Institute seems to have missed a major implication of fossil embryos several millions of years before the Cambrian “explosion.” Think about it: Those embryos had to have come from precursor ancestors, and that would therefore show that the Darwinian prediction of the existence of simpler pre-Cambrian life. It shows, therefore, that such organisms did in fact exist, but that they were rarely ever fossilized. Fossilization is already a rare enough occurence without the organisms being much softer than is accustomed. But, another detail the DI seems to have missed: I do not remember any scientist ever saying that soft-bodied, pre-Cambrian fossils could never be preserved. They can be, it’s just much more of a novelty. Correct me if I am wrong, but I think the Discovery Institute is attacking a strawman.

Something I find exceptionally interesting is the interest that the film takes in fossils from southern China. All along, citing these fossils as evidence for their conclusion, I’m left to wonder why other fossils from China are ignored. In pre-Cambrian deposits dating from the Doushantou Formation, evidence of animal life in the form of adult Cnidirians was found. Among the finds were fossilized embryos and larvae tat resembled Anthrozoans. Not to mention, there s also evidence of cnidirian body plans with anthozoan affinity. An implication of this find is that  stem groups of bilaterians were also present between 25 to 45 million years before the Cambrian “explosion.” — Then, also there is more recent evidence from the same formation that complex, bilatarians existed between 40 to 55 million years before the Cambrian. — These fossil finds I cited were made in the first half of the last decade, between 2002, and 2005. These finds alone would show that the Cambrian “explosion” was likely less explosive. In contrast, the film Darwin’s Dilemma was released in September, 2009. Why didn’t the Discovery Institute include these fossil finds? Because of ignorance or bias? You make the call. — I go into more detail in my previous post entitled “The Truth on the Cambrian ‘explosion.’

Between scenes, the Discovery Institute indulges in the usual Creationist quote mining from well-known scientists about the appearance of the Cambrian fauna in the fossil record, but prominently Stephen Gould. Personally, I found that somewhat disrespectful since he is dead with his statements still being hijacked. Then also, they use a very selective quote from Richard Dawkins about the Cambrian’s abruptness in which he says, “It’s as though they were just planted there, without any evolutionary history.” You just have to realize that Dawkins is an Atheist and a major anti-Creationist to realize that he ultimately was not endorsing that view.  Besides, as he proposes a little later that “it might be that many of these animals had only soft parts to their bodies: no shells or bones to fossilize,” a view which the film goes out of its way to attempt refuting.  — The Quotes from Charles Darwin can be dismissed since they are 151 years out of date, and do not reflect the research accomplished since he published his theory.

A final claim made is on genetic information, and questioning whether or not Darwinian mechanisms can produce it. After deciding that it cannot, they resort to their typical “designer did it” cop-out. They try to rationalize their logic by saying that information is the product of intelligence, yada, yada . . . .  I’m not going to even bother to refute the typical argument from ignorance.

Basically, the film really doesn’t address anything that hasn’t been debunked before, it just seems to be a bit more sophisticated, and a bit more informative than other pieces of Creationist propaganda, but that’s probably because it admits to the existence of some fossils from before the Cambrian. I guess from that, it is the “best” Intelligent Design film I’ve ever seen, but that isn’t saying much. Mostly, the only real thing this film has going for it is its graphics, though I have seen better. I guess one of its goals is to dazzle the uninformed layperson with its computer graphics?  Who can tell? The Discovery Institute may accept the scientific age of the earth, but other than that, they aren’t much better than ICR.

References:
Precambrian Animal Life: Probable Developmental and Adult Cnidarian Forms from Southwest China, by Jun-Yuan Chena, Paola , Feng Gaoa, Stephen Q. Dornbos, Chia-Wei Lid, David J. Bottjer and Eric H. Davidson. From Science Direct, and Developmental Biology.
The Early Evolution of Animals by David J. Bottjer, from Scientific American.

Recommended Reading:
Transitional Forms and the Evolution of Phyla, by Glenn R. Morton, from American Scientific Affiliation. Published in Perspectives on Science and Christian Faith.
Cambrian Explosion, from SkepticWiki

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A New Challenge to a Creationist

Lately, I have been commenting on  a Creationist blog, defending Evolutionary theory from Creationist distortions. Of course, one may wonder why I would take the time, and endure the headache of defending the fact of Evolution when arguing with Creationists is often a futile crusade. Well, I guess my reasons are that 1) somebody has to do it, and 2) I’m a glutton for punishment. I like to argue my case.

For the last few months, Eelco, who often comments on the Creationist blog has been issuing a few questions to Michael (the Creationist blogger) who has completely ignored them. In fact, Michael rarely ever — if even ever — engages in discussion with anyone who disagrees with him. The questions Eelco asks Michael on every post are,

(1) Blog readership numbers ?

(2) Your qualifications to discuss any scientific subject, in response to the challenge to Olorin.

(3) A substantive review of Signature in the Cell, promised for August 2009.

(4) outstanding question from Upson Downes on mitochondrial Eve.

Sounds fair enough, no? — Olorin, who Eelco mentions in number two was another frequent commenter who always took Michael to task, and who seems to now been blocked from posting comments anymore.  Personally, I am waiting for Michael to answer Eelco, but I’m not holding my breath.

UPDATE: Olorin was banned from posting on the blog temporarily. He now has been unblocked, I imagine because of preasure that Michael has been feeling about banning him in the first place.

But now I have my own separate challenge to Michael. I refuted Irreducible complexity in my comments on his blog, and I never have gotten him to respond to me. All he did was respond to a fellow Creationist by quoting the long-refuted Michael Behe, and then he attacked the Science Talk.Origins website saying,

Talking origins is out dated piece of bias and will continue to be outdated while we learn more about nature like the FLAGELLUM.

Just pointing out, Michael couldn’t even get the name of the website right — He called it “Talking origins.” It’s Talk Origins. But I digress…

Realizing that he completely ignored EVERYTHING I said, and every argument made against Irreducible Complexity, all he does is attack a science website, and then pull out the obvious “We’re learning more about the flagellum!!” — Well, no dip!! And for some reason, he wants to treat any new discovery about the flagellum as bad for Evolution, and therefore good for Creationism, which he has no basis for.

Well, anyway, I responded to him saying,

The only bias Talk.Origins has is in favor of real scientific research.

I already showed in an earlier comment that flagellum is NOT irreducible. . . Earlier, I pointed out,

An Important fact that ANYONE here has yet to mention is that the flagellum IS NOT EVEN IRREDUCIBLE. — In 1988, G. Kuwajima was able to remove ONE-THIRD of the 497 amino acids from the flagellum, AND IT STILL WORKED PERFECTLY!!!!! . . . Also, we know that the L and the P-rings can be taken away from the flagellum, and it will STILL work. . . .

Michael, if you want to cry “BIAS!!!” then you should do so ONLY AFTER refute this fact that I pointed out.

From now on, i will be issuing a similar challenge to you that Eelco has issued to you, and one you have FAILED to take on. . . except it will be awaiting your refutation of the facts I pointed out about the REDUCIBILITY of the flagellum.

That’s my challenge to him. Will he take me up on it? I’m not holding my breath. Probably like a good Creationist, he will just pretend that it isn’t there, like he does with Eelco’s challenge.