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Posts tagged: evolution

The Tornado in the Junkyard – Aish HaTorah Employees Should Read This

By Martin Goldstein, February 2, 2010 7:07 am

This is all from Ebonmusing. It is a addressed to Creationists but essentially Aish HaTorah and Chabad, Kiruv.com and all the other outreach manufacturing plants practice a form of sophisticated Creationist voodoo.

In his 1983 book The Intelligent Universe, astronomer Fred Hoyle wrote the following infamous passage:

“A junkyard contains all the bits and pieces of a Boeing 747, dismembered and in disarray. A whirlwind happens to blow through the yard. What is the chance that after its passage a fully assembled 747, ready to fly, will be found standing there? So small as to be negligible, even if a tornado were to blow through enough junkyards to fill the whole Universe.” (p.19)

Though Hoyle actually intended this as an argument against abiogenesis, the creationists have since assimilated it and used it against evolution. In creationist literature, this argument has mutated into a diversity of forms: setting off an explosion in a print shop to produce a dictionary, disassembling a watch and shaking up the pieces in a box to reassemble it, and so on, building a bicycle by applying a blowtorch to a pile of bicycle parts, and so on. No matter what form the analogy takes, however, creationists have promoted it as a common-sense proof of the impossibility of evolution producing complex, highly ordered forms. There is even a creationist book titled Tornado in a Junkyard.

This essay will show that this analogy is not an accurate representation of how evolution (or, for that matter, abiogenesis) works. In fact, it is a straw man, a ridiculous caricature that bears no resemblance to what the theory actually says. However, it is first helpful to establish a few things about the credentials of its author. Fred Hoyle was an astronomer, and whatever the validity of his professional opinions on astronomy, he was not trained in biology, paleontology, genetics, or any other field having to do with evolution. He was no more qualified to make pronouncements about evolution than any layman, and indeed his comments demonstrate a profound misunderstanding of the theory. Nevertheless, whatever he was, he was certainly not a creationist.

“The creationist is a sham religious person who, curiously, has no true sense of religion. In the language of religion, it is the facts we observe in the world around us that must be seen to constitute the words of God. Documents, whether the Bible, Qur’an or those writings that held such force for Velikovsky, are only the words of men. To prefer the words of men to those of God is what one can mean by blasphemy. This, we think, is the instinctive point of view of most scientists who, curiously again, have a deeper understanding of the real nature of religion than have the many who delude themselves into a frenzied belief in the words, often the meaningless words, of men. Indeed, the lesser the meaning, the greater the frenzy, in something like inverse proportion.”
–Fred Hoyle and Chandra Wickramasinghe, Our Place in the Cosmos (1993), p.14

“We are inescapably the result of a long heritage of learning, adaptation, mutation and evolution, the product of a history which predates our birth as a biological species and stretches back over many thousand millennia…. Going further back, we share a common ancestry with our fellow primates; and going still further back, we share a common ancestry with all other living creatures and plants down to the simplest microbe. The further back we go, the greater the difference from external appearances and behavior patterns which we observe today…. Darwin’s theory, which is now accepted without dissent, is the cornerstone of modern biology. Our own links with the simplest forms of microbial life are well-nigh proven.”
–Fred Hoyle and Chandra Wickramasinghe, Lifecloud: The Origin of Life in the Universe (1978), p.15-16

We turn now to the tornado in the junkyard. This analogy says nothing about the validity of evolution, or for that matter abiogenesis, because it fails to represent them in four crucial ways.

1. It operates purely according to random chance.
2. It is an example of single-step, rather than cumulative, selection.
3. It is a saltationary jump – an end product entirely unlike the beginning product.
4. It has a target specified ahead of time.

The first point is the most important. The tornado in the junkyard is an example of an intricate, complex and highly organized form being produced by nothing more than random chance. But evolution is not chance. (See this article for more on this.) Rather, it operates according to a fixed law – the law of natural selection – which favors some assemblages over others; it preferentially selects for those adaptations which improve fitness and selects against those that do not. The tornado, by contrast, slams parts together and tears them apart with no preference whatsoever, thus completely failing to represent natural selection, the central force which drives evolution. To more accurately represent evolution, one would have to grant the tornado some power to recognize assemblages of parts which could serve as part of a 747 and prevent it from tearing them apart.

Second, the tornado analogy is an example of single-step selection – in one step, it goes from a random pile of parts to a fully assembled airliner. This is completely unlike evolution, which operates according to a process of cumulative selection – complex results that are built up gradually, in a repetitive process guided at each step by selective forces. To more accurately represent evolution, the tornado could be sent through the junkyard not once, but thousands or millions of times, at each step preserving chance assemblages of parts that could make up a jumbo jet.

Third, in relation to the point above, the tornado in the junkyard is an example of saltation – a sudden leap in which the end product is completely different from the beginning product. Evolution does not work this way; birds do not hatch out of dinosaur eggs and monkeys do not give birth to humans. Rather, species grow different over time through a process of slow change in which each new creature is only slightly different from its ancestor. Evolution forms a gradually shading continuum in which any two steps are almost identical, though the creatures at the beginning and end of the continuum may be very different indeed. If we sent a tornado through a junkyard once, we would not expect to see a complete airplane; but if we repeated the process thousands or millions of times, at each step preserving useful assemblages, we might see a jumbo jet gradually taking shape out of slowly accreting collections of parts. The idea is the same with living things. We do not see complex new creatures appearing suddenly in the fossil record; rather, we see them gradually forming by a process of modification from a line of increasingly dissimilar ancestors.

Finally, the tornado analogy fails to represent evolution in one more significant way: it has a target specified ahead of time. Evolution does not. Natural selection is not a forward-looking process; it cannot select for what may become useful in the future, only what is immediately useful in the present. To more accurately represent evolution, we might add the additional stipulation that the tornado be allowed to assemble, not just a jumbo jet, but any functional piece of machinery.

A tornado racing through a junkyard hundreds of thousands of times, at each step somehow preserving rather than tearing apart functional assemblages of parts, with the aim of ultimately producing some sort of working machine, be it a 747, a station wagon or a personal computer – this is still not a very good analogy to describe evolution, but it is far better than the implausible caricature of random, single-step saltation with a predetermined target the creationists put forth. This analogy completely fails to represent evolution in every significant way.

window horse

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Bombardier Beetles and the Argument from Design

By Martin Goldstein, January 13, 2010 11:25 am

Creationism and the Bombardier Beetle

bombardier beetle design argumentCreationism believes that all life looks designed, and an often used example of this intelligent design is a creature known as the Bombardier Beetle. Defending this claim requires a careful examination of the bombardier beetle and of the definition of the word “design”. Under scrutiny, however, the bombardier beetle can be a proof of evolution and seriously challenges the design argument.

What Makes Bombardier Beetles Special?

Bombardier beetles are so-called ground beetles in the four groups Brachinini, Paussini, Ozaenini, and Metriini and comprise over 500 species. The group Brachinus is the most common group.

Bombardier beetles are amazing creatures. They are so called due to their ferocious ability to defend themselves against predators by shooting a mixture of scalding hot and toxic chemicals from glands in their behinds.

This is how their defensive squirting action works. Secreting cells produce hydroquinones and hydrogen peroxide which collect in a bladderlike vessel. This vessel is opened through a muscle-controlled sphincter onto a thick-walled reaction chamber. This chamber is lined with cells secreting catalases and peroxidases. As the contents of the bladder are forced into the reaction chamber, the catalases and peroxidases quickly break the hydrogen peroxide down and catalyze the oxidation of the hydroquinones into p-quinones. This releases free oxygen and generates sufficient heat to bring the mixture to the level of boiling which vaporizes a fifth of it. Under pressure of the released gasses, the sphincter is automatically shut which forces the chemicals through openings found in the abdomen.

Unfortunately, and making real debate and communication almost impossible, creationists offer an un faithful account of the process. The creationist Duane Gish made the claim that hydrogen peroxide and hydroquinones would explode spontaneously when mixed without a chemical inhibitor, and that the beetle starts with a mix of all three and adds an anti-inhibitor when he wants the explosion.

In reality, the two simply do not explode when mixed, as has been frequently demonstrated. Gish stubbornly still used the mistaken scenario after being corrected by Kofahl in 1978. Why let the truth get in the way of a good story? The same mistake is also repeated in books by Hitching in 1981, Huse in 1983 and 1993, and twice in a creationist magazine in 1990.

How strong is an argument of design if the people making it don’t know what the design looks like?

Irreducible Complexity: The Design Argument’s Best Buddy that Never Calls Back

Just knowing what something looks like doesn’t reveal whether it is designed; for that, we must define “design”.

Although it’s rarely defined, the most important aspect of design as it relates to creationism appears to be complexity. Richard Lumsden says,

Systems that are of high complexity, that is functionally integrated multicomponent systems, systems that are of high specificity where only one or very few of many possible arrangements of these components works, and systems which are of low probability, at least spontaneous occurrence . . . these are the hallmarks of purposefully designed engineered systems. [Lumsden, 1995]

The problem for proponents of intelligent design and the design argument is that the theory of evolution already allows that complex, functionally integrated, low-probability systems can arise via gradual variation and selection. Darwin’sntheory explains how a few photosensitive cells might evolve gradually into human eyes. In order for complexity to be a problem for the concept of evolution, it must demonstrate some property that rules out gradual development. Michael Behe proposes such a property with the concept he calls “irreducible complexity,” which he defines as “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.” Although Behe leaves open the questions of whether bombardier beetles are irreducibly complex, Gish expresses the concept with reference to them when he says, “How are you going to explain that step-by-step by evolution by natural selection? It cannot be done!”.

Gish is obviously not as right as he believes himself to be; a step-by-step evolution of the bombardier system is not hard to imagine.

In a future post I will show a potential step-by-step evolution of the bombardier beetle mechanism all the way from a primitive arthropod.

The Bombardier Beetles – Nothing is Real

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