Posted on 02/12/2006 10:32:27 AM PST by PatrickHenry
MORE THAN A CENTURY and a half since Charles Darwin wrote "On the Origin of Species," evolution remains a controversial concept among much of the population. The situation is quite different in the scientific community, where evolution is almost universally accepted. Still, attacks on the teaching of evolution continue.
The more recent criticism of evolution comes from proponents of intelligent design, a new label for creation "science." They claim ID is a valid scientific alternative to explaining life on Earth and demand it be taught in science classes in our schools along with evolution.
Although intelligent design is cloaked in the language of science and may appear at first glance to be a viable theory, it clearly is not. In fact, intelligent design is neither a theory nor even a testable hypothesis. It is a nonscientific philosophical conjecture that does not belong in any science curriculum in any school.
A theory in the scientific sense is quite different from how the word is often used in conversation.
Theories are structures of ideas that explain and interpret facts. They are based on extensive data and their predictions are tested and verified time and again.
Biological evolution -- genetic change over time -- is both a theory and a fact, according to paleontologist Stephen Gould. Virtually all biologists consider the existence of evolution to be a fact. It can be demonstrated in the lab and in nature today, and the historical evidence for its occurrence in the past is overwhelming.
However, biologists readily admit that they are less certain of the exact mechanism of evolution; there are several theories of the mechanics of evolution, which are supported by data and are constantly being refined by researchers whose work is subject to peer review.
But there are many established facts concerning evolution, according to R.C. Lewontin, Alexander Agassiz Professor Emeritus of Zoology at Harvard University. He, as do virtually all biological scientists, agree that it is a fact that the Earth with liquid water has been around for more than 3.6 billion years and that cellular life has been around for at least half of that period.
We know for a fact that organized multicellular life is at least 800 million years old and that major life forms now on Earth did not exist in the past.
It is considered a fact by biologists that all living forms today come from previous living forms.
A fact is not the same as absolute certitude, which exists only in defined systems such as mathematics. Scientists consider a "fact" to be something that has been confirmed to such a degree of reliability and logic that it would be absurd to think otherwise.
Denying the facts of evolution is akin to denying that gravity exists. What is debatable, with both evolution and gravity, are the theories of the mechanics of how each operates.
Supporters of intelligent design vehemently disagree, but they do not offer alternative theories or verifiable data. Instead, intelligent design proponents attack evolution with misinformation, half-truths and outright falsehoods.
Intelligent design does not develop hypotheses nor does it test anything. As such, intelligent design is simply a conjecture that does not hold up to scrutiny.
False arguments
Unfortunately, intelligent design has considerable credibility outside the scientific community by making specious claims about evolution. Below are some of the leading charges made by intelligent design and creationist proponents in the past several years.
• Evolution has never been observed: But it has. Biologists define evolution as a change in the gene pool of a population of living organisms over time.
For example, insects develop resistance to pesticides. Bacteria mutate and become resistant to antibiotics. The origin of new species by evolution (speciation) has been observed both in the laboratory and in the wild.
Some intelligent design supporters admit this is true, but falsely say that such changes are not enough to account for the diversity of all living things. Logic and observation show that these small incremental changes are enough to account for evolution.
Even without direct observation, there is a mountain of evidence that confirms the existence of evolution.
Biologists make predictions based on evolution about the fossil record, anatomy, genetic sequences and geographical distribution of species. Such predictions have been verified many times, and the number of observations supporting evolution is overwhelming and growing, especially in the field of genetics.
Biologists have not observed one species of animal or plant changing quickly into a far different one. If they did, it would be evidence against evolution.
• Evolution violates the second law of thermodynamics: It clearly does not. This law of physics states essentially that disorder increases in a closed system. Some intelligent design and creationist proponents say this means that the order required in the evolution of simple life forms to more complex ones cannot take place, at least not on a long-term basis.
What critics of evolution don't say is that the Earth's environment is not a closed system. It absorbs enormous heat energy from the sun, which is all that is required to supply fuel for the evolution of plants and animals.
Order arises from disorder in the physical world as well, in the formation of crystals and weather systems, for example. It is even more prevalent in dynamic living things.
• There are no transitional fossils: This argument is a flat-out falsehood. Transitional fossils are ones that lie between two lineages with characteristics of both a former and latter lineage. Even though transitional fossils are relatively rare, thousands of them have been found.
There are fossils showing transitions from reptile to mammal, from land animal to whale, the progression of animals leading to the modern horse, and from early apes to humans.
• Theory says that evolution proceeds by random chance: This is an example of a half-truth perpetuated by intelligent design and creation supporters.
Chance is an important element of evolution, but it is not the only thing involved.
This argument ignores other forces such as natural selection, which weeds out dysfunctional species, and is the opposite of chance.
Chance takes place in genetic mutations, which provide the raw material of evolutionary change, which is then modified and refined by natural selection. But even at the genetic level, mutations occur within the framework of the laws of physics and chemistry.
Opponents of evolution argue that chance, even enhanced by natural selection and the laws of physics, is not enough to account for the complexity of DNA, the basic building blocks of almost all life forms. (RNA is the foundation of some microbes). However, there literally were oceans of organic molecules that had hundreds of millions of years to interact to form the first self-replicating molecules that make life possible.
Irreducible complexity
The attack on evolution that intelligent design proponents use most often today is one based on "irreducible complexity." This has become the foundation of their attempts to cast doubt on evolution.
They argue that certain components of living organisms are so complex that they could not have evolved through natural processes without the direct intervention of an intelligent designer.
Michael Behe, a leading proponent of intelligent design, defined irreducibly complex as "a 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."
In other words, irreducible complexity refers to an organism that does something (a function) in such a way that a portion of the organism that performs the function (a system) has no more parts than are absolutely necessary.
The argument made is that the entire system with all its parts, such as an enzyme used in digestion or a flagellum used to propel a bacterium (an example Behe favors in his defense of irreducible complexity), would have to come into being at one time -- a virtual impossibility.
If one of the parts were missing, Behe argues, the system would not be able to function, and thus a simpler, earlier evolving system could not exist.
It is not as easy as it may appear at first glance to define irreducible complexity because there is not a good definition of what a part is. Is it a particular type of tissue, a cell, or segment of DNA? Behe is not clear. But even if he were able to define a true IC system, his argument would fail.
There are several ways an irreducible complexity system could evolve. An early version could have more parts than necessary for a particular function. The individual parts could evolve. Most likely, an earlier version of the system could have had a different function.
This is observed in nature. For example, take the tail-like flagellum of a bacteria, which Behe says supports irreducible complexity. It is used for functions other than motion. A flagellum can be used to attach a bacteria to a cell or to detect a food source.
Thus, a precursor to a more complex flagellum could have had a useful, but different, function with fewer parts. Its function would have changed as the system evolved.
Simply put, the irreducibly complex system argument doesn't work. Most, if not all, of the irreducible complexity systems mentioned by intelligent design adherents are not truly IC. Even if they were, they clearly could have evolved. That is the consensus of almost all biological scientists.
Intelligent design is not science
The theory of evolution and common descent were once controversial in scientific circles. This is no longer the case.
Debates continue about how various aspects of evolution work. However, evolution and common descent are considered fact by the scientific community.
Scientific creationism, or intelligent design, is not science. Believers of intelligent design do not base their objections on scientific reasoning or data.
Instead, it appears that their ideas are based on religious dogma. They create straw men like irreducible complexity or lack of transitional fossils, and shoot them down. They fabricate data, quote scientists out of context and appeal to emotions.
Intelligent design disciples do not conduct scientific experiments, nor do they seek publication in peer-reviewed scientific journals.
Still, they have had an impact far beyond the merits of their arguments.
One of their most persuasive arguments is an appeal to fair play, pleading to present both sides of the argument. The answer is no. They do not present a valid scientific argument.
Within the scientific community, there is virtually no acceptance of intelligent design. It has no more place in a biology class than astrology in an astronomy class or alchemy in a chemistry class.
ah.
once again you engage in ad hominem, strawmen, fantasy, hyperbole, and libel rather than attempt to rebut any concrete issue I have raised.
typical.
You said "Yet we're to believe that corn somehow might produce a stork tomorrow.". The theory of evolution makes no such claims. You are a liar. You are dishonestly misrepresenting the theory of evolution and then tearing down your misrepresentation. Why should I believe you when you're so transparently dishonest?
Yep, and an FR poll is scientific representative of All America... An internet poll. BTW, given the term "freeping" which we all are aware of, used normally to scuttle knowingly misleading nonscientific internet based polls as it were.. I would not be surprised if either side "freeped" an FR poll.
Nor would I be surprised to find that a poll didn't come out as expected and one side or the other needed to concoct a story. Sorry. Nice try though.
The minute you raise a concrete issue, I'll absolutely faint.
I promise.
If you believe all life on earth is an accident you are a moron.
Science can't even answer the question of what came first, the chicken or the egg?
Once again, lets put *your* brain in neutral so you can get it around a notion. *You* have never witnessed speciation. The theory for the moment is irrelevant. If you've never seen it, the theory is a guess at it no matter how smart the people guessing are. Care to go back and look at the gag reals over what "experts" thought flight would look like before two bicycle builders actually did it...
Evolution, to the extent that it exists at all, hasn't read your theory. So, who cares what your theory claims. Really. If you had ever seen speciation actually happen, your theory might have relevance to what one should expect speciation to look like. We've seen everything from p.e. to changes over millions of years. So I pick something on one end for sake of absurdity. Evolution doesn't care how absurd it looks to you or makes you look. It really doesn't. So why should evolution be bound by your theorizing when you've never seen it work. Actually, more than any other question right now, that's one I'd really love to have answered.
I believe Earth is an experiment of a far advanced form of intelligence than anything that is found on earth. It's too complex to have come from some big bang theory.
Shameless liar response - nah, I posted CBS's poll, hardly the dominion of the Christian populace in this country and arguably more objective. They've got every reason to dilute the christian influence and still show 55% against evolution altogether with - 27% adopting evolution + God. The best numbers you get are via bastardization of your own belief system. The worst numbers you get are people believing you without modifications. 13 percent. Even worst for you and your own poll, only 6 percent of Bush voters - those in power - believe it unadultered and unmodified..
Now, you can dress them numbers up however you want to try. No amount of base, lipstick and garters is gonna make that pig a prom queen.
The brianiacs can't even answer the chicken or the egg question. Get back to me when they do.
Ok, excuse me while I go laugh uncontrollably at what you just offered as speciation. When I get back, I'll hope you're prepared to be serious.
concrete issue:
despite your silly post concerning seeds and their products, that corn kernels produce corn adults is not surprising, as the kernels are already fixed in genotype. what is relevant to molecular evolution is that sometimes the adult corn plant produces genetically different corn kernels.
your response thus far:
crickets chirping, receding footfalls of dishonest debater.
That is not unique to the evolution theory. The only thing you're expressing is variation of corn, not corn becoming something else. Fixed genotype or no. The only concrete thing you've offered is that you can spin something. Period. Your problem is that you're unable to recognize your own spin.
Thus the crickets chirping. Thus Fred chirping.
Obviously it must have been a lobster first. Evolution 101. It's elementary. Don't you realize you're ignorant for not knowing that and you should be grateful I'm condescending to answer you at all.. lol
mutation, troll: mutation. not "variation"
So you don't actually have any evidence to support your claims. Your cop-out is noted.
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