In my previous post on this topic, I covered roughly the first half of Michael Behe's lecture on ID at Penn State. In what follows, I will finish summarizing his lecture, intersperse questions that relate to his points, and end with a final reaction and fun picture.
We ended last time by addressing the "structural obstacles" that Behe notes exist that might block, in principle, Darwinian evolution. (I'll get to this Darwinian business later.) He used the poster child of the ID movement, the bacterial flagellum, to explore "irreducible complexity" (IC). This concept is simple enough. Any IC system is defined in Darwin's Black Box as follows:
"By irreducibly complex I mean a single system composed of several well-matched, interacting parts that contribute to the basic function, wherein the removal of any one of the parts causes the system to effectively cease functioning. An irreducibly complex system cannot be produced directly (that is, by continuously improving the initial function, which continues to work by the same mechanism) by slight, successive modifications of a precursor system, because any precursor to an irreducibly complex system that is missing a part is by definition nonfunctional. An irreducibly complex biological system, if there is such a thing, would be a powerful challenge to Darwinian evolution."Behe notes that we use IC machines all the time. Look at the mouse trap for example. It has five parts that work together to catch mice: a platform, a catch, a spring, a hammer, and a hold-down bar. This looks reasonable enough. Remove one part and you lose the mouse-traps function. Behe used the mousetrap in both parts of his lecture so we'll go with it.
There is a lot wrong with this definition and the analogy to the mousetrap. Mostly what's wrong with them are the facts that they aren't true. If you want a good first go at what's wrong with IC then take a look at Ken Miller's "The Flagellum Unspun," at some of the chapters in Why Intelligent Design Fails like David Ussery's "Darwin's Transparent Box," or numerous essays over at Talk Origins. I'll just very briefly note two things. First, in the years since Behe wrote Darwin's Black Box and testified at the Dover trial, there has been a fair amount of work that shows the possible evolutionary pathways that led to the bacterial flagellum including the Type Three Secretory System injectisome (TTSS) aptly shown by Nick Matzke. Three people asked questions about this and he tried to talk his way out of them but he couldn't say why, based on the definition he has written, the TTSS couldn't have been exapted and become a flagellum.
This is point two: exaptation follows from the discussion of the TTSS. Behe's definition does not take into account that structures are exapted or reappropriated for another purpose. For example, feathers may have started as a way to stay warm but now serve as flight mechanisms and for sexual displays. In the case of a bacteria's flagellum, you can remove lots of parts from the flagellum and you have a working injector like the one we find in the Bubonic plague. It has a fully functioning nano-pump that could serve as the basic driver for a flagellum. If Behe was right, the removal of all of those parts should be, by definition, non-functional. They aren't and Behe really has no response for it despite the fact that he's been promising for years that he would answer these criticisms. Last night he still didn't.
He did respond quite thoroughly to critiques of his mousetrap argument. John McDonald has purported to show that you can make a mousetrap with fewer parts, whittling them down from five to four to three to two and eventually one. If you want to read more about it check out McDonald's take here and then Behe's reply here. It's fun to read and think about. But there is a huge problem with the analogy.
Mouse traps do not reproduce sexually or asexually. They have no analogue for self-producing mutations that would or could generate a novel mechanism. We know that human beings design, fashion, and select mouse traps. There is no empirically verified external intelligent agent to the bacteria designing, fashioning, and selecting the flagellum. We do know that the bacteria mutates, giving rise to slight changes in genotype and phenotype, and that nature selects those things that make the bacteria fit. Simply stated, the mouse trap analogy is so laden with subjectivity that it ends up kind of begging the question of design about any seeming IC system. Behe was questioned about this and admitted that the issue of replication is an important distinction but he doesn't really think it's problematic. I disagree.
Behe also said that there is a lot of evidence for design and little for Darwinian evolution. Once again, he quoted Dawkins' The Blind Watchmaker, "Yet the living results of natural selection overwhelmingly impress us with the appearance of design as if by a master watchmaker." And as he did elsewhere, he provided no discussion of what the blind watchmaker thesis is at all or how evolution through mutation, natural selection, gene flow, and genetic drift could result in the biological structures around us. The Blind Watchmaker is a 400+ page book with a breathtaking explanation of how complexity emerges from such simple processes. Behe paid it no mind at all. Really, it was a shameful caricature.
To this end, I'd like to note that he never defined intelligent design. He referred a great deal to "Darwinian evolution by mutation and natural selection" but didn't care to define those terms either. He assumed that people knew what he was talking about. Maybe they did.
After this, he responded to his critics. I collapsed the mouse trap discussion into the IC section above so I won't rehash. The bulk of his response dealt with Judge Jones 139-page decision in Kitzmiller v. Dover. Honestly, it was just a bunch of sour grapes because Jones derived most of his decision directly from Eric Rothschild's final submission for the prosecution. Behe, like Casey Luskin and others, complained that Jones had basically plagiarized his decision. This seems like it might be reasonable. It's not.
A judge might not want to say things differently than they were argued to her/him because s/he needs to represent the arguments as they were. To this end, we should expect that judges will be as accurate as possible. Accomplishing that goal might entail very extensive quotations. His decision represents the logic of the winning case. So it goes.
Jones listened to many dozens of hours of testimony and read hundreds and thousands of pages of submissions and depositions and selected the arguments that won. We hear complaints, particularly from conservative Christians, that there are too many activist judges interpreting things and legislating from the bench. I don't think that we want them getting too much into interpretation and reinterpretation. Jones kept his hands off of the arguments themselves, let them quite literally speak for themselves, and used them to form a well-reasoned argument that concluded that ID is repackaged creationism, that it is therefore religion, and that it is also not science. Behe would have loved to have had his side quoted extensively and had his argument lead the way to ID's inclusion in science classrooms. He didn't.
Additionally, Behe did not substantively deal with the arguments that Judge Jones included. Instead, he went after Jones himself. He picked out some of Jones's statements from well after the trial. Jones said that some of the presentations at the trial were "mind-numbingly technical" and that "the highly technical scientific testimony [was] rapidly disappearing" from his memory. Of course it was. In the nine months following Kitzmiller Jones was listening to other cases and ruling on them. It requires a lot of work and all of that information gets overwritten with other stuff. That's what happens to active federal judges. I don't remember a lot of my students' papers from last year. I don't think that I am of low intelligence for this. It's part of being an active thinker and learner that the transient stuff is transient. Why should we expect that Jones would be able to recall the "highly technical" information later? We shouldn't. Instead we expect that he should be able to sift through a lot of information, evaluate it, and rule accordingly. He did that.
Behe didn't like it. And just to show his persecution complex, Behe compared himself to the main character in Franz Kafka's The Trial. Once again: sour grapes.
During Q & A a few questions came up worth noting. Some people asked how IC can be tested. He said two things: 1. ID is not opposed to evolution and that he in fact accepts common descent and the age of the earth and universe as currently measured by physicists. 2. The claim is falsifiable if someone were to get some bacteria to develop a novel IC structure. He talked a great deal about Richard Lenski who has been running the E. coli Long-term Experimental Evolution Project for about twenty years. Behe thinks that perhaps we should see a novel structure evolve. He notes that genes get dropped and other mutations emerge but nothing IC comes about.
I would have loved to ask, "Why aren't those intelligently designed? How do you know?" He doesn't and can't. You can't tell if there is actually some invisible superbeing tinkering with the bacterial genome while all of this is happening. Maybe all of nature is being constantly tinkered with by the intelligent designer but we just can't tell. That's why it is parsimonious to conclude that there is a blind watchmaker at work all the time - natural selection.
Anyway, Behe doesn't say why nor what conditions we should set up to create selective pressures that would effect these changes in E. coli. Another questioner responded to this saying that an organism as simple and ancient and well-adapted as the current E. coli would not be the ideal candidate for such an experiment but something more complex and prone to large morphological changes. This and three other exchanges on approximately the same topic went on for some time.
Someone asked who the intelligent designer is? He said that ID can't answer that question because it is outside of the scope of the inferences we can make. All we can do is say that if something looks designed then it was. What does he think? He thinks the intelligent designer is God but that it could be an angel, angels, demons, or aliens. Hey! Even Francis Crick floated the idea that we could be the result of aliens seeding the earth through a process called directed panspermia. Not many people actually believe that though.
Who designed the designer? How would we know. Once again, Behe doesn't know. Maybe that's for philosophers and theologians to figure out.
These two questions should raise some flags for us. The reason we infer design in human artifacts is because we know who designed them: us! We have no such empirical knowledge about flagella, cilia, or anything else. Dogs make dogs. Ciclids make ciclids. We observe them subtly change generation to generation. Where's the designer? We have to ask who it is. Saying otherwise is disingenuous. Everyone knows that he's talking about God.
I got the last question of the night. Cool. He said that this is all about scientific inferences. Religion does not guide this. But his colleagues at the Disco 'Tute are overtly religious in much of their writing. Johnathan Wells has admitted that he got a Ph.D. in evolutionary developmental biology to dismantle evolution. William Dembski has called ID the "logos theology of John stated in the idiom of information theory." Phillip Johnson sees ID as part of "theistic realism." How do you you not conclude that this isn't religious? It's full of God and Jesus.
He said that you can make a scientific inference that can have philosophical aspects. Wells and
Dembski both have degrees in theology and so it's important to them. They are going to find those connections and make them and that's their business to do. But Behe is just a scientist.Thus ended the presentation. Afterward, I got my picture taken with him and got his autograph. On Darwin's Black Box you might ask? No sir. On the David Ussery's chapter I alluded to earlier titled "Darwin's Transparent Box." Check it out! I thought he was quite a sport for doing it.
Having now seen Behe talk in person I want to wrap up some of my thinking on him for the time being. None of this talk in any way persuaded me that he is remotely credible as a critic of evolution. If he were, I think that we would see him performing the kinds of experiments that Lenski is doing only doing so to create the selective pressures that might generate the kinds of IC systems he thinks can't happen. He could also generate a whole bunch of other ID predictions and test those too and get a lab going and work it out. The Disco 'Tute has a $4 million annual budget. Let's get some research going.
But he hasn't and I don't guess that he will based on the utter lack of ID research out there. Their one peer-reviewed paper was thrashed for its faulty reasoning and there is no research to speak of. Search PubMed or Web of Science and you'll find 80-some articles that include the words "intelligent design" in them. Most of those are engineering articles and the remainder are scathing critiques of ID. No research. So what is this?
Just look at who invited Behe to talk. The Science and the Bible club. Not the Biology Club or the Anthropology Graduate Student Association. A club about the Bible whose purpose is religious. That's a fine club to have. I appreciate that they are seeking to understand something about their faiths and hoping to accord science to it. We are people seeking meaning and part of the modern condition of educated people is trying to figure out how our beliefs can and do align with science. So it is no surprise that they invited Behe because he has been so celebrated by leading evangelists and Christian publications like Christianity Today. Behe is a guy in a labcoat that Christians can use to prop up parts of their faith.
But we have to note that Behe's arguments have been thoroughly dismantled and discarded by scientists. There is no ID research program working on ID hypotheses. Why not? Because it can't generate testable predictions and it uses dressed-up ideas like "irreducible complexity" that are essentially an argument from personal incredulity. "I can't think of how X could have evolved so it must have been designed." Well, what's the designing mechanism?
Silence.
The designer's mechanisms, sans evolutionary mechanisms, are still the same that they were in 1802 when Paley wrote Natural Theology, when Hume dismantled the argument from design in Dialogues Concerning Natural Theology, when Augustine wrote, or when the ancient Greeks argued about design. God did it. Obviously, that's not a mechanism.
So most of what Behe and ID proponents do is argue against evolution. They have nothing positive to offer in the scientific literature of their own so they cherry pick and quote mine and decontextualize guys like Richard Dawkins or Richard Lenski. Instead of taking on any of Dawkins specific points or dealing with the substantive points of how Lenski has shown the power of natural selection, they make straw men and knock them down. Even their arguments against evolution don't engage evolution responsibly or cogently. So the support that Behe gives to the Science and Bible Club members is poorly done and has been and continues to be thoroughly refuted.
But even if all of this were thoroughly shown to the Science and the Bible Club, most of them would still believe what they believe because they believe that believing matters and that somehow their belief is true. It's not really about science at all. It's about faith and meaning. Behe tells them they're right. Sigh.
To close this out, I was glad to have seen Behe. It was interesting to be in a room of people eager to hear him, most of whom are believers. And I was glad to see science faculty, staff, and students there trying to disabuse people of their belief that Behe's arguments are scientifically legitimate. Most of all, I was glad to see people actively engaging their beliefs in a quite open forum. It pays to be thoughtful.
For a really different take on the talk go to the SENtinel.




















