Tag Archives: Reason

Polemics

The origin of life, part 1 of 2: the building blocks of life

7 Comments

The origin of life

There are two problems related to the origin of the first living cell, on atheism:

  1. The problem of getting the building blocks needed to create life – i.e. the amino acids
  2. The problem of creating the functional sequences of amino acids and proteins that can support the minimal operations of a simple living cell

Normally, I concede the first problem and grant the atheist all the building blocks he needs. This is because step 2 is impossible. There is no way, on atheism, to form the sequences of amino acids that will fold up into proteins, and then to form the sequences of proteins that can be used to form everything else in the cell, including the DNA itself. But that’s tomorrow’s topic.

Today, let’s take a look at the problems with step 1.

The problem of getting the building blocks of life

Now you may have heard that some scientists managed to spark some gasses to generate most of the 20 amino acids found in living systems. These experiments are called the “Miller-Urey” experiments.

The IDEA center has a nice summary of origin-of-life research that explains a few of the main problems with step 1.

Miler and Urey used the wrong gasses:

Miller’s experiment requires a reducing methane and ammonia atmosphere,11, 12 however geochemical evidence says the atmosphere was hydrogen, water, and carbon dioxide (non-reducing).15, 16 The only amino acid produced in a such an atmosphere is glycine (and only when the hydrogen content is unreasonably high), and could not form the necessary building blocks of life.11

Miller and Urey didn’t account for UV of molecular instability:

Not only would UV radiation destroy any molecules that were made, but their own short lifespans would also greatly limit their numbers. For example, at 100ºC (boiling point of water), the half lives of the nucleic acids Adenine and Guanine are 1 year, uracil is 12 years, and cytozine is 19 days20 (nucleic acids and other important proteins such as chlorophyll and hemoglobin have never been synthesized in origin-of-life type experiments19).

Miller and Urey didn’t account for molecular oxygen:

We all have know ozone in the upper atmosphere protects life from harmful UV radiation. However, ozone is composed of oxygen which is the very gas that Stanley Miller-type experiments avoided, for it prevents the synthesis of organic molecules like the ones obtained from the experiments! Pre-biotic synthesis is in a “damned if you do, damned if you don’t” scenario. The chemistry does not work if there is oxygen because the atmosphere would be non-reducing, but if there is no UV-light-blocking oxygen (i.e. ozone – O3) in the atmosphere, the amino acids would be quickly destroyed by extremely high amounts of UV light (which would have been 100 times stronger than today on the early earth).20, 21, 22 This radiation could destroy methane within a few tens of years,23 and atmospheric ammonia within 30,000 years.15

And there were three other problems too:

At best the processes would likely create a dilute “thin soup,”24 destroyed by meteorite impacts every 10 million years.20, 25 This severely limits the time available to create pre-biotic chemicals and allow for the OOL.

Chemically speaking, life uses only “left-handed” (“L”) amino acids and “right-handed” (“R)” genetic molecules. This is called “chirality,” and any account of the origin of life must somehow explain the origin of chirality. Nearly all chemical reactions produce “racemic” mixtures–mixtures with products that are 50% L and 50% R.

Two more problems are not mentioned in the article. A non-peptide bond anywhere in the chain will ruin the chain. You need around 200 amino acids to make a protein. If any of the bonds is not a peptide bond, the chain will not work in a living system. Additionally, the article does not mention the need for the experimenter to intervene in order to prevent interfering cross-reactions that would prevent the amino acids from forming.

The progress of science

As science has progressed, the discoveries have proved out the need for a Creator and Designer in every area – the big bang, cosmic, galactic and stellar fine-tuning, the Cambrian explosion, etc…. and even the origin of life.

“More than 30 years of experimentation on the origin of life in the fields of chemical and molecular evolution have led to a better perception of the immensity of the problem of the origin of life on Earth rather than to its solution. At present all discussions on principal theories and experiments in the field either end in stalemate or in a confession of ignorance. New lines of thinking and experimentation must be tried.”

(Dose, Klaus, “The Origin of Life: More Questions Than Answers,” Interdisciplinary Science Reviews, Vol. 13, No. 4, 1988, p.348.)

Meanwhile, atheists are left to have blind faith that the progress scientists have made during decades of research will be miraculously overturned by new evidence that their beloved unobservable Flying Spaghetti Monster, (peas be upon him), did it. Hey! Don’t blaspheme against the non-supernatural powers of his noodly appendage! (Two Ph.Ds in biology will not save you from the wrath of the Darwoid cultists!)

To see how bad this gets for atheists, watch this video where Dawkins says that unobservable aliens evolved somewhere else and then seeded the Earth with life. He has no evidence that these aliens did evolve (no fossil record), and even worse, he does not know whether they even exist. Nevertheless, that is the state of atheism today – an unobservable Flying Spaghetti Monster evolved somewhere else and seeded the Earth with life.

What else could have happened?

Further study

One of my favorite resources on the origin of life is this interview from the University of California with former atheist and origin of life researcher Dean Kenyon. Kenyon, a professor of Biology at San Francisco State University, wrote the textbook on “chemical evolution”, which is the view that chemicals can arrange themselves in order to create the first living cell, without intervention.

This interview from the University of California with another origin of life researcher, Charles Thaxton, is also one of my favorites.

You’ll need Quicktime to see the videos, or buy the videos from ARN. (Kenyon, Thaxton) I have both of them – they rock!

Mentoring

What got me started on apologetics? William Lane Craig debate transcripts

1 Comment

Yes, William Lane Craig debate transcripts. In fact, I still read them from time to time to keep up my skills.

Here’s one of my favorites, the Craig-Nielsen debate on grounding morality without God

Summary:

THE CRAIG-NIELSEN DEBATE: GOD, MORALITY, AND EVIL
William Lane Craig and Kai Nielsen
with annotations by William Lane Craig
February 1991, University of Western Ontario

Best part:

Finally, he raises the issue of immortality and says, “Death doesn’t undermine moral values. In fact, things that we value become all the more precious.” Well, in one sense he’s right. It’s the absence of God that undermines the objectivity of moral values, not death. But let’s suppose that there are objective moral values. What would be undermined by the lack of immortality? I think two things.

First, I think there would be no reason to adopt the moral point of view. Since you’re going to die, everyone ends up the same. It doesn’t make any difference whether you live as a Hitler or a Mother Teresa. There is no relationship between your moral living and your ultimate fate. And so in that sense, death undermines the reason for adopting the moral point of view rather that just being an egoist and living for self.

Second, there’s no basis for self-sacrifice on this point of view. Why should an atheist, who knows everything is going to end in death, do things that are morally right that go against self-interest? For example, a few years ago there was a terrible mid-winter air disaster in Washington, DC, as a plane crashed into a bridge spanning the Potomac River, spilling its passengers into the icy waters. And as the helicopters came to rescue these people, attention focused on one man who again and again passed by the rope ladder rather than be pulled to safety himself. Seven times he did this, and when they came again, he was gone. The whole nation turned its eyes to this man in respect and admiration for the noble act of self-sacrifice that he did. And yet on the atheistic view, that man wasn’t noble. He did the stupidest thing possible. He should have gone for the rope ladder first, pushed others away, if necessary, in order to survive! But to give up all the brief existence he will ever have for others he didn’t even know? Why? It seems to me, then, that it’s not simply the absence of God that undermines objective moral values, but ethical living is also undermined by the atheistic point of view because you then have no reason to adopt the moral point of view and you have no basis for acts of self-sacrifice.

By contrast, on the Christian view, where you have both God and immortality, you have the necessary presuppositions for the affirmation of objective moral values and for consistent living of the ethical life.

And another of my favorites, the Craig-Taylor debate on the ontological grounding of morality.

Summary:

Is The Basis Of Morality Natural Or Supernatural?
Richard Taylor and William Lane Craig
October 1993, Union College, Schenectady, New York

Sample Craig:

(2) I argued that moral accountability also exists under the supernaturalist view, and Professor Taylor didn’t deny the point.

(II) What about my critique, then, of naturalism? I said that naturalism doesn’t provide a sound foundation for morality, and here I made two points:

(1) On the naturalist view, objective right and wrong do not exist. Again, Professor Taylor doesn’t deny this point; he just says, “Well, to say that they’re conventional doesn’t mean they’re contemptible.” Well, granted; but it does mean they’re arbitrary, they’re non–objective. There’s no more difference between moral right and wrong than driving on the right–hand side of the road versus the left–hand side of the road. It’s simply a societal convention. And the modern evolutionist thinks these conventions are just based in socio–biological evolution. According to Michael Ruse, a professor of the philosophy of science,

The position of the modern evolutionist…is that humans have an awareness of morality…because such an awareness is of biological worth. Morality is a biological adaptation, no less than are hands and feet and teeth…. Considered as a rationally justifiable set of claims about an objective something, [ethics] is illusory. I appreciate that when somebody says, ‘Love thy neighbor as thyself,’ they think they are referring above and beyond themselves…. Nevertheless…such reference is truly without foundation. Morality is just an aid to survival and reproduction and…any deeper meaning is illusory….{26}

This is essentially the same view as Professor Taylor’s. Moral values are simply rooted in socio–biological evolution, that have passed down as certain taboos and certain commands, but they have no objective validity in terms of their moral rightness or wrongness. Professor Taylor says, “But I have a high regard for people who are truly moral and decent.” I don’t deny that. Of course he does! But the point is that in his ethics, in his philosophy, he has no basis for that affirmation. What I bring is not a new set of values—I think we pretty much hold those in common—but I’m offering a secure foundation for those values that we all want to hold dear.

You see, on Professor Taylor’s view, there really isn’t any objective morality. I think every one of us here tonight would agree that it’s wrong to kill babies and that the holocaust was morally wrong. But in his book Professor Taylor says, “The infanticide practiced by the Greeks of antiquity did not violate their customs. If we say it was nevertheless wrong, we are only saying that it is forbidden by our ethical and legal rules. And the abominations practiced by the Nazis…are forbidden by our rules, and not, obviously, by theirs.”{27} I submit that that is simply a patently false view of moral values and that naturalism, therefore, can’t provide any objective basis for right and wrong.

And another of my favorites, the Craig-Tooley debate on the problem of evil.

Summary:

A Classic Debate on the Existence of God
Dr. William Lane Craig & Dr. Michael Tooley
November 1994, University of Colorado at Boulder

Sample Craig:

(2) Christian doctrines increase the probability of the coexistence of God and the evils in the world. Let me just mention a couple of these.

(i) On the Christian view, the purpose of life is not happiness as such in this life. Rather it is the knowledge of God—which will ultimately produce true and everlasting happiness. What that means is that many evils occur in this life which might be utterly pointless with respect to producing human happiness. But they might not be pointless with respect to producing the knowledge of God. Dr. Tooley assumes when he talks about changes that would make this world a better place, that the purpose of life is basically to be happy in this life. And I certainly admit that you could make changes that might appear to make this life a better place, make it happier. But that’s not God’s purpose. So if you understand that the purpose of life is not happiness as such, I think that you can see that the existence of evil doesn’t necessarily cast any improbability upon God’s existence.

(ii) It’s also the Christian view that God’s purpose spills over into eternal life. In the afterlife God will bestow a glory and happiness upon us that is incomparable to what we’ve suffered here on earth. And the longer we spend in eternity with Him, the more the sufferings in this life shrink by comparison to an infinitesimal instant. Dr. Tooley admits in his article that it is possible that immortality could justify such evils. But, he says, it’s “very unlikely” that there is life after death. Well, I have two comments. First, I’d like him to prove that it’s unlikely that there is life after death.{26} Second, I suggest that the resurrection of Jesus gives us grounds for hoping in life after death, and I’ve attempted to justify that historically. So given these Christian doctrines, I think you can see that the existence of God and evil is not so improbable after all.

[…]

(4) Finally, I think that there is actually an argument for God from evil. It would go like this:

(i) If God does not exist, objective moral values do not exist. If there is no God, moral values are either socio-biological by-products or just expressions of personal preference.

(ii) Evil exists. That’s the premise of the atheist. There is real evil in the world.

(iii) Therefore, objective values do exist. Some things are really wrong.

(iv) Therefore, God exists.

Thus the presence of evil in the world actually demonstrates God’s existence because in the absence of God, there wouldn’t be any distinction objectively between good and evil, between right and wrong. So although evil in one sense calls into question God’s existence, in a much deeper sense, I think, it actually requires God’s existence.

So in the light of these four responses, I think that the argument from evil, as difficult and emotionally pressing as it might be, in the end doesn’t constitute a good argument against the existence of God. So I think the four arguments given against the existence of God by Dr. Tooley are inconclusive. You’ve still got my six arguments for God’s existence, and therefore I still think that on balance the evidence favors theism as the more rational worldview.

You can find more debates here.

Commentary

Scientific American assesses naturalistic explanations for the origin of life

Leave a comment

From Scientific American. (H/T Letitia via Mary)

Excerpt:

As recently as the middle of the 20th century, many scientists thought that the first organisms were made of self-replicating proteins. After Francis Crick and James Watson showed that DNA is the basis for genetic transmission in the 1950s, many researchers began to favor nucleic acids over proteins as the ur-molecules. But there was a major hitch in this scenario. DNA can make neither proteins nor copies of itself without the help of catalytic proteins called enzymes. This fact turned the origin of life into a classic chicken-or-egg puzzle: Which came first, proteins or DNA?

RNA, DNA’s helpmate, remains the most popular answer to this conundrum, just as it was when I wrote “In the Beginning…” Certain forms of RNA can act as their own enzymes, snipping themselves in two and splicing themselves back together again. If RNA could act as an enzyme, then it might be able to replicate itself without help from proteins. RNA could serve as gene and catalyst, egg and chicken.

But the “RNA-world” hypothesis remains problematic. RNA and its components are difficult to synthesize under the best of circumstances, in a laboratory, let alone under plausible prebiotic conditions. Once RNA is synthesized, it can make new copies of itself only with a great deal of chemical coaxing from the scientist. Overbye notes that “even if RNA did appear naturally, the odds that it would happen in the right sequence to drive Darwinian evolution seem small.”

The RNA world is so dissatisfying that some frustrated scientists are resorting to much more far out—literally—speculation. The most startling revelation in Overbye’s article is that scientists have resuscitated a proposal once floated by Crick. Dissatisfied with conventional theories of life’s beginning, Crick conjectured that aliens came to Earth in a spaceship and planted the seeds of life here billions of years ago. This notion is called directed panspermia. In less dramatic versions of panspermia, microbes arrived on our planet via asteroids, comets or meteorites, or drifted down like confetti.

John Horgan is not a Christian, nor even a theist. This is the state of the art if you are a naturalist.

Basically, you have at most a couple hundred million years from the time the Earth cools to the appearance of first life. You are unlikely to get one measly protein without an intelligence arranging the amino acids. This is assuming we spot you a favorable environment for creating amino acids without intervention. And then there would still be the problem of sequencing the proteins.

Atheists oppose science and evidence

Theists support science and evidence