Category: Evolution, Science

To be decided

2011-11-12

Monkeys, Typewriters and Evolution

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Evolution, Science
Tags:

Probably most people curious enough to read a blog like this will know well enough already Richard Dawkins’ answer to the creationists’ analogy of the probability of monkeys typing the works of Shakespeare being used to debunk the idea of evolution.

But for the benefit of the random reader (as remotely likely and also possible as 2 monkeys with two typewriters typing two 2 character words — don’t forget punctuation keys, spaces, capitalization, numbers, etc) who has not encountered what is probably the simplest rebuttal of all of this “works-of-Shakespeare-typed-by-a-million-monkeys-at-typewriters” analogy, here is evolutionist Richard Dawkins’ rebuttal. He kind of substitutes weasels for monkeys as the main focus of attention, and then switches their roles from actants to objects, but no matter. The point is to demonstrate something real by means of a real (i.e. legitimate) analogy, and monkeys can still be kept in there as the behind-the-scenes typists.

So if we postulate that the primary mechanism of evolution is natural selection, then we will understand that natural selection favours certain genetic configurations over others. Those particular configurations that it favours for survival will be more likely to survive than the others. This is the classical model of the theory of evolution.

So with a nod to rationalwiki here is Dawkin’s monkey (sorry, WEASEL) analogy:

So much for single-step selection of random variation. What about cumulative selection; how much more effective should this be? Very very much more effective, perhaps more so than we at first realize, although it is almost obvious when we reflect further. We again use our computer monkey, but with a crucial difference in its program. It again begins by choosing a random sequence of 28 letters, just as before:

WDLTMNLT DTJBKWIRZREZLMQCO P

It now ‘breeds from’ this random phrase. It duplicates it repeatedly, but with a certain chance of random error – ‘mutation’ – in the copying. The computer examines the mutant nonsense phrases, the ‘progeny’ of the original phrase, and chooses the one which, however slightly, most resembles the target phrase, METHINKS IT IS LIKE A WEASEL. In this instance the winning phrase of the next ‘generation’ happened to be:

WDLTMNLT DTJBSWIRZREZLMQCO P

Not an obvious improvement! But the procedure is repeated, again mutant ‘progeny’ are ‘bred from’ the phrase, and a new ‘winner’ is chosen. This goes on, generation after generation. After 10 generations, the phrase chosen for ‘breeding’ was:

MDLDMNLS ITpSWHRZREZ MECS P

After 20 generations it was:

MELDINLS IT ISWPRKE Z WECSEL

By now, the eye of faith fancies that it can see a resemblance to the target phrase. By 30 generations there can be no doubt:

METHINGS IT ISWLIKE B WECSEL

Generation 40 takes us to within one letter of the target:

METHINKS IT IS LIKE I WEASEL

And the target was finally reached in generation 43. A second run of the computer began with the phrase:

Y YVMQKZPFfXWVHGLAWFVCHQXYOPY,

passed through (again reporting only every tenth generation):

Y YVMQKSPFTXWSHLIKEFV HQYSPY

YETHINKSPITXISHLIKEFA WQYSEY

METHINKS IT ISSLIKE A WEFSEY

METHINKS IT ISBLIKE A WEASES

METHINKS IT ISJLIKE A WEASEO

METHINKS IT IS LIKE A WEASEP

and reached the target phrase in generation 64. m a third run the computer started with:

GEWRGZRPBCTPGQMCKHFDBGW ZCCF

and reached METHINKS IT IS LIKE A WEASEL in 41 generations of selective ‘breeding’.

There is a little macro or whatever at http://rationalwiki.org/wiki/Dawkins_weasel#cite_ref-1 where you can see this evolutionary process in action for yourself. One time I tried it I almost thought I saw only 7 iterations (i.e. generations) to complete the process. But obviously that is the sort of “luck” that defies anything we might expect in the real world. So try it again and see how many times it takes more than 70 iterations to achieve the goal!

I think this scientific response to the creationist analogy has more persuasive power than any efforts by befuddled theologians (e.g. James McGrath on Exploring Our Matrix) who are offended enough to modify the analogy to have monkeys use mere 4 key typewriters!

The Dawkins’ explanation is from his book The Blind Watchmaker

2010-12-14

Let Christian ID’ers join forces with their Moslem counterparts and prove BOTH the Bible and the Qur’an

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Evolution, Science, Religion and Atheism
Tags: ,

In following up why there has been a sudden strange peak of hits on my post about Adam’s rib really being a penis bone I find that the post was linked in the course of a creationist or ID discussion. However, the focus was not on the usual Christian fundamentalists, but on a Moslem scientist having articles arguing that the failure of geneticists to resurrect dead cells or create life proves that the Qur’an (why don’t we spell it Koran anymore?) is inspired by God or Allah.

The first post, the one worth reading, is Genomics is All Wrong. At least here in the post and additionally in the comments one learns what the actual arguments of geneticists are.

The second post (and the one including a link to my Adam’s rib post) is less savory in its tone (Wahid is Back).

I wonder what Christian fundamentalists think of Moslem fundamentalists using much the same pseudo-scientific arguments to prove their respective holy books.

2010-11-01

Evolution and God go together like Newtonian physics and Hobgoblins

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Evolution, Science
Tags: ,

I tried to explain a technical computer fix to someone once over the phone. I ended up saying something like, “Press the X and Y keys, and a little man inside the computer will do ABC for you.”

Isn’t that the sort of fantasy nonsense that is required to reconcile evolution with a belief in a personal God who has a special thing for humans?

How does evolution work?

The combined effects of mutation, natural selection and the random processes of genetic drift cause changes in the composition of a population. Over a sufficiently long period of time, these cumulative effects alter the population’s genetic make-up, and can thus greatly change the species’ characteristics from those of its ancestors.

That’s from Evolution: A Very Short Introduction by Brian and Deborah Charlesworth. The back cover blurb contains a panegyric by Richard Dawkins.

Now that makes humans no more unique, or pre-ordained, than sponges. There is no room for supernatural intervention in the terms “natural selection” or “random processes.”

If we like to think we can believe in evolution BUT God somehow guided it to make sure it produced us for Jesus Christ or Jehovah or Allah, then aren’t we kind of copping out, kidding ourselves, and really no different from the person who believes a computer works because there is a little man inside the thing making it work just right?

Stained glass at St John the Baptist's Anglica...
Image via Wikipedia

2010-10-14

Evolution, creationism, civil discourse and “you know what”

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Ethics & Human Nature, Evolution, Science
Tags: ,

Yesterday I was browsing in a bookshop the many shelves of books about evolution (or “life sciences” — but most books were about evolution). I was slightly amazed how many of those books were scholarly publications that their cover blurbs explained were addressing Creationists or Intelligent Design proponents. Every one of those that I opened up was a serious, respectful, direct and fact-based book explaining the evidence for evolution and addressing Creationist’s objections and arguments. All were written by scientists.

Not one was a ridiculing or derisively putting down Creationists or their arguments.

Now I believe that Creationist arguments should not be taught in public schools. I am sure most of those scientist authors would believe the same. But it was obvious that they also believed that those arguments “deserved to be heard”. Why else would they write respectful books about them?

It is one thing to exclude certain arguments and speech from forums marked off for certain purposes that exclude that form of speech for justifiable reasons. It is quite another to say someone who is not inciting harm or invading privacy and such does not deserve to be heard. (It is also obviously legitimate to speak out strongly against ideas that we do believe to be harmful.)

Having just caught up with McGrath’s recent post, I should be clear and let it be known that I am very sure that not all scientists are always so tolerant and civil in their approach to Creationism. But fortunately in the “free market of books and ideas”, the jerks were not published and on the shelf for sale. At least not in Borders’ Singapore’s Orchard Road branch.

At the same time I have no reason to think that even those who publish respectful books are always the model of decorum, even in private company, when the topic is raised. But that’s fine. Farting is always best kept private.

I can’t speak for others, but one reason I think that even arguments, for example, about alien abductions and Atlantis and even Christianity “deserve to be heard” is because they are very often sincerely entertained by my brothers and sisters, fellow humans. It’s about respect and simply trying to be a decent human getting along with others as vulnerable as myself. I was introduced to Enlightenment literature when quite young and I still feel attached to the idea of hearing people out and sharing what I can with them and respecting them enough to continue with their own journey. And always — literally always — in the back of my mind is how wrong I have been before when I was so sure I was right, and how tentative human knowledge and understanding have always been.

Thus when people bring up the topic of alien abductions I am able to share with them my experience with sleep paralysis, and how during those years, being religious, I then understood the experience described today by some “alien abductees” to be demonic. In the case of the talk of Atlantis, I am able to share my knowledge of the history of the idea itself and origin as a myth.

Probably most of us who have had the benefit of more education than others, or some experiences that have enabled insights from uncommon perspectives, feel our lives are more worthwhile if we can give back to the community, to others, something of what we have gained. It’s all about sharing experiences and ideas and trusting enough people to make the more justifiable choices and responses.

I tend to think of creationists as being the ones who do the ridiculing and play the avoidance games and latch on to side-irrelevancies (sophistry), and of the scientists being the ones who engage in a serious, direct, respectful, evidence-based argument.

Street sign for Orchard Road in Singapore.
Image via Wikipedia

2010-10-04

What sort of God is compatible with evolution?

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Evolution, Science
Tags: ,

Phylogenetic Tree of Life
Image via Wikipedia

The fact of evolution means that humans are not some sort of distinctive “end product” any more than elephant grass or grasshoppers or lichen are “end products”. The fact that we have evolved language makes us no more unique in the grand evolutionary scheme of things than elephants that have evolved trunks. Humans have not been here very long, and given the nature of evolution, there is no reason to assume they will be around forever. Self-conscious life with our level of intelligence may even prove not to be such a good idea in evolutionary terms if it ends up wiping out most other species and even ends up extinct through destroying its own environment or through advanced technological warfare. Or if it does survive, it may find it does so in something no longer human as we understand human — in another species yet again. Evolutionary history surely guarantees it.

Yet most religions as I understand them, at least those big 3 “of the Book”, Judaism, Christianity and Islam, give a special place to humans above all other species. The more enlightened adherents of these religions claim to believe in evolution, but I try not to think too much about how they can do that. If they are thinking that there is nothing really random about the mutations or anything truly natural about the conditions that affect survival, that God somehow did pull a few strings here and there along the way, or started it in a way so that it would turn out just so, then they are no longer evolutionists but closet supernaturalists, creationists, or Intelligent Designers — only trying to be less “in your face” about it.

Or if they say that mankind is made in the image of God then they are declaring evolution has somehow come to an end with us, and they are not evolutionists at all. They are creationists who try to keep the little angels tinkering with things along the way hidden from view. Will Abraham or Jesus be relevant once a new species replaces humans as the dominant one on the planet?

The problem of evil multiplies, too. The unspeakable evil inflicted by some humans on their own kind and other animals is bad enough. But evolution has bred evils of terror and suffering too painful to contemplate among so many species, not only humans. What sort of God is opting to tinker this but not that along the way?

I can understand the need for God. Religion is one of those “human universals” I think humans by nature will always have to live with. Some religions had a hard time adjusting to relocating the Earth to a lower place in the heavens, and today the “religions of the book” are continuing to be challenged by new understandings in genetics and human nature.

If human cultures by nature are destined to always have religion of some kind, a religion that is genuinely compatible with the facts of evolution, and what we know of genetics today, will have to discard any holy book that implies homo sapiens is somehow the ‘end’ (in both the sense of finality and goal) of evolution.

2010-09-27

The Myth of the Flat Earth Myth

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Evolution, Science
Tags: ,

The idea that the earth was flat was never part of medieval Christian doctrine.

Men and women of any education around AD1000 were perfectly well aware that the earth was a sphere.

I never knew that till I read God’s Philosophers: How the Medieval World Laid the Foundations of Modern Science by James Hannam. The only thing I know about James Hannam is from the dust jacket blurb that says he is a graduate of both Oxford and Cambridge where he gained a PhD in the history of science, and that he has written a very interesting book.

So where did the idea that medieval folk believed the earth was flat come from?

James Hannan attributes this understanding to Sir Francis Bacon:

The myth that a flat earth was part of Christian doctrine in the Middle Ages appears to have arisen with Sir Francis Bacon (1562-1626), who wrongly claimed that geographers had been put on trial for impiety after asserting the contrary. (Hannam’s citation for this is John Henry, Knowledge is Power: How Magic, the Government and an Apocalyptic Vision Inspired Francis Bacon to Create Modern Science, 2003. p.85)

Hannan does add that “there were a few authentic flat-earthers in antiquity, but none among the scholars of the Middle Ages proper.”

So why have some historians fallen for the idea of the flat earth idea?

One of the main reasons that some historians have previously fallen for the flat earth idea is because of the existence of mappae mundi (Latin for ‘maps of the world’) like the famous example at Hereford Cathedral.

Hannan illustrates with the map depicted here. Known as the T-O map, the O represents the ocean that encircles the inhabitable landmass, while the T represents the Mediterranean Sea, the River Nile and either the River Volga or Don. This T sea/river pattern split the landmass into the continents of Europe, Africa and Asia. Jerusalem was usually placed near the centre.

It is easy to assume from such a map that those who drew it thought the earth was flat. But in fact the map was only intended to show the area of the earth that is inhabited.

Francis Bacon, From a Painting
Image via Wikipedia

2010-09-17

Why Evolution Is True: And Reflections on Historical Jesus Scholars

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Biblical Scholars, Biblical Studies, Evolution, Science, New Testament
Tags: ,

Cover of "Why Evolution Is True"
Cover of Why Evolution Is True

Someone posted a link to a post on my blog on Jerry Coyne’s blog “Why Evolution Is True” (See his post: I get Christian email: more irreducible complexity)  — and wonderful, wonderful! I like reading books like his (I have referenced Coyne’s book twice here but never knew he also had a blog) — and I loved reading his summary explanation for the evolution of sex. He was giving a clearly reasoned, evidence-based response to a Creationist. I have read more detailed accounts of this topic, but what was refreshing was to see how real science, real argument, real logic, real evidence, really works. You don’t find arguments like that — or you certainly very rarely find them — when historical Jesus scholars respond to Jesus mythicist arguments. Actually that is misleading. Historical Jesus scholars very rarely in my experience ever respond to Christ myth arguments. They mostly pretend to, usually with a snicker or sneer, and demonstrate their ignorance or incomprehension of

  1. basic historical methodological ideals in nonbiblical studies,
  2. the arguments they think they are addressing,
  3. and the difference between logical fallacies and logical rigour. Continue reading “Why Evolution Is True: And Reflections on Historical Jesus Scholars”

2010-09-09

A Creationist Method of Argument (and exposing the lie of those who compare mythicism to creationism)

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Biblical Scholars, Biblical Studies, Evolution, Science
Tags: , , ,

A dome-shelled Galápagos giant tortoise, Geoch...
Image via Wikipedia

A good friend who is a creationist recently offered me a creationist article to read (“or refute”). The article’s arguments against evolution are based on:

  1. a misstatement of, or failure to understand, the arguments for evolution itself
  2. a glossing over of arguments for evolution by misleading oversimplifications
  3. a failure to address the counter-evidence for evolution cited by evolutionary scientists
  4. “bait and switch” — “sloppy language leading to sloppy thinking”

The article my friend gave me is Tortoises of the Galapagos by Lita Cosner and Jonathan Sarfati, apparently found in creation.com.

Here is the critical passage:

Evolution from goo to you via the zoo would require new genes encoding encyclopedic amounts of new information. But the tortoises’ adaptation to various island environments can be explained by the sorting out of already existing genes with some of these then eliminated by natural selection. . . .

The two sentences here do not logically follow one another. The authors have created a false argument against evolution by juxtaposing two sentences that in fact address different questions: by placing them together they confuse the question and lead the uninformed reader to think the authors have cleverly rebutted the foundation of evolution’s case. Continue reading “A Creationist Method of Argument (and exposing the lie of those who compare mythicism to creationism)”

2010-06-26

What the science says about fetal awareness and pain

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Evolution, Science
Tags: ,

It’s in the various news sites, but I like to get as close to the source as possible to see what it says: Here’s the link to The Royal College of Obstetricians and Gynaecologists website and its own news release.

2010-05-06

Free Will and the Value of Self-Deception

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Ethics & Human Nature, Evolution, Science
Tags: , ,

The paper of the day: “The Value of Believing in Free Will.” A scientific study that shows why many scientists and philosophers are reluctant to tell people they don’t have free will.

This is from the commonsenseatheism site, which many readers of this blog will already have seen, but for the others, it’s interesting reading. I think I can relate to its conclusions.

For those who don’t want to read the whole thing or want to test the water, some extracts:

The belief that one determines one’s own outcomes is strong and pervasive. In a massive survey of people in 36 countries, more than 70% agreed with the statement that their fate is in their own hands (International Social Survey Programme, 1998).

Yet the view from the scientific community is that behavior is caused by genes underlying personality dispositions, brain mechanisms, or features of the environment (e.g., Bargh, in press; Crick, 1994; Pinker, 2002). There is reason to think that scientists’ sentiment is spreading to nonscientists. For example, the news magazine The Economist recently ran the headline, ‘‘Free to Choose? Modern Neuroscience Is Eroding the Idea of Free Will’’ (‘‘Free to Choose?’’ 2006). What would happen if people came to believe that their behavior is the inexorable product of a causal chain set into motion without their own volition? Would people carry on, selves and behavior unperturbed, or, as Sartre suggested, might the adoption of a deterministic worldview serve as an excuse for untoward behaviors?

That’s the opener. The conclusion . . . . Continue reading “Free Will and the Value of Self-Deception”

2009-12-21

Latest interview with Richard Dawkins

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Ethics & Human Nature, Evolution, Science, Religion and Atheism
Tags:

A lovely interview with Richard Dawkins on the Australian ABC TV program Elders was aired this evening — interviewer Andrew Denton. Check out video excerpt and transcript here.

2009-11-07

Appealing to Faith in a Search for Truth, Playing Tennis Without a Net

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Biblical Scholars, Biblical Studies, Evolution, Science, Religion and Atheism
Tags: , , , , ,

Before you appeal to faith when reason has backed you into a corner, think about whether you really want to abandon reason when reason is on your side.

(This quote and the following post are largely taken from page 154 of Darwin’s Dangerous Idea by Dennett.)

Many believers in God claim that their faith is something beyond reason and cannot validly be tested by the standards of science and rational thought. This is fine on a personal comfort level, but many believers also insist that it must apply just as meaningfully when they bring their faith into arguments about evolution, origins of life and the universe, and other pursuits for truth.

Philosopher Daniel C. Dennett has a beautiful response to this faith claim. He begins by referring to philosopher Ronald de Sousa who described philosophical theology as “intellectual tennis without a net“, with the net being a metaphor for rational judgment.

Let the believer who insists that the rigour of scientific method or rational argument not be allowed to touch his faith have the first serve, Dennett begins. Whatever the believer serves, suppose the nonbeliever replies:

What you say implies that God is a ham sandwich wrapped in tinfoil. That’s not much of a God to worship!

The believer volleys back demanding to know how the nonbeliever can logically make such a claim that his (the believer’s) opening serve has such a preposterous implication. So the nonbeliever replies:

Oh, do you want the net up for my returns, but not for your serves? Either the net stays up, or it stays down. If the net is down, there are no rules and anybody can say anything, a mug’s game if there ever was one. I have been giving you the benefit of the assumption that you would not waste your time or mine by playing with the net down.

Not that Dennett is opposed to faith per se. What he wants to see “is a reasoned ground for taking faith seriously as a way of getting to the truth . . .”

Before you appeal to faith when reason has backed you into a corner, think about whether you really want to abandon reason when reason is on your side.

Dennett assists the reader in answering this question with a few thought experiments:

1. You and your loved one are touring a foreign land when your loved one is brutally murdered before you eyes. Now in this land the legal system allows friends of the accused to testify their faith in his innocence. The judge listens to friend after friend tearfully, sincerely, movingly testify to their complete faith in the accused’s innocence, and by the end of the hearing this judge is far more swayed by their faith claims than the evidence of the prosecution. Would you be willing to live in such a place?

2. You are about to be operated on by a surgeon who tells you that whenever he hears a little voice telling him to disregard his medical training and do something different, he listens to and follows that still small voice. . . . .

Dennett concludes:

I know it passes in polite company to let people have it both ways, and under most circumstances I wholeheartedly cooperate with this benign arrangement. But we’re seriously trying to get at the truth here, and if you think that this common but unspoken understanding about faith is anything better than socially useful obfuscation to avoid mutual embarrassment and loss of face, you have either seen much more deeply into this issue than any philosopher ever has (for none has ever come up with a good defense of this) or you are kidding yourself. (The ball is now in your court.)

From http://gssq.blogspot.com/2008_02_01_archive.html

2009-10-23

Response to creationist Jonathan Sarfati

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Evolution, Science
Tags:

I will not be accepting an invitation I recently received to attend a lecture by creationist Jonathan Sarfati. I looked at Creation Ministries website and found an online book of his there, and dashed off my responses to it chapter by chapter and pasted it in Google Docs: http://tinyurl.com/jsarfati. Will respond to my invitation by directing my inviter to this page.

I’m sure someone more knowledgeable could write a better response, and I’m willing to take suggestions for improvement on board. But I had to start somewhere.

2009-10-18

The Greatest Show On Earth: The Evidence for Evolution

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.

by Neil Godfrey

Filed under: Evolution, Science
Tags: ,

I have just completed Richard Dawkins’ latest book, The Greatest Show on Earth: the Evidence for Evolution. Loved just about all of it, but a few particular themes have left their mark in my mind more than others.

1. The idea of essentialism. We think of dogs and pigs and fish as having an essential character of dogs and pigs and fish. This is, after all, at the very heart of basic concept building from our earliest years that equips us with the tools we need to get by in the world. (Dawkins traces the notion back to Plato — who was of course the arch essentialist with his theory of Ideas (Essences?) — but I see the idea as having a more immediate necessity for our mental makeup.)

But we are like a mayfly trying to make sense of the world in its short 30 minute to 24 hour lifespan. While we can see changes in dog shapes we cannot expand our faculties far enough to see how what appears to be essentially a dog now was a million years earlier something we would not call a dog at all. Yet in the meantime, the chain from that earlier non-dog to our “essential” dog is smooth and we could never find a spot where one animal was a dog and the preceding one wasn’t. Every animal next in line would be classified as a natural offspring of its parent. The differences from one generation to the next would never be so great as to prove otherwise. It is only when we look back through incomprehenible millions of years that we can see that there have been such dramatic changes. Slightest changes (that would never be so great as to enable us to say a parent gave birth to a different species) accumulated over millions of years really can lead to the appearance of something quite different from what was in the family tree at the beginning.

The corollary of this concept is that change does not occur at the outward level of appearance, but at the embryological level. So a lizard like thing 50 million years ago might have two offspring, and each one of those another offspring, and no-one would have been able to see anything about them that made any of them a different species. But one of those final offspring would be the progenitor of what was to become a new species. But for this to occur there would have to be a geographical separation of some of that offspring’s descendants in order to narrow the range of genetic mix — either by being swept on a log to another land mass, or changes from earthquake etc.

But getting around our presumptions that each species has a certain “essential” character to it that sets it within the boundaries of that species is something that one can understand makes the idea of evolution difficult for anyone not familiar with the evidence.

2. Dating the rocks and fossils. I once was led to believe that evolutionists were so dumb that they failed to acknowledge that their methods of dating were circular. Rocks were dated by the fossils in them and fossils were dated by the rocks that housed them. Dawkins trashes this nonsense completely by discussing lucidly the wide range of dating techniques used by archaeologists and paleontologists, and how they are used for cross checking and correcting each other. For God to have somehow changed so many laws of nature after the flood to make the whole gammut of these different clocks all get out of whack to mislead us to thinking that the earth’s age is in billions of years is a bit much to swallow.

  1. I had not fully appreciated the UNimportance of the fossil record for establishing the fact of evolution. Not that there isn’t an abundance of fossil evidence, especially for humans. But even if there were no fossils surviving we would be compelled to believe in evolution nonetheless. By comparing the structures of species around the world, and examining their geographical locations, it is clear that the evidence points to common ancestors of species (and a common ancestor of all life) and non-random natural selection. (Fossils are still important, of course, for understanding the pathways of evolution.)

  2. One creationist in the film, Voyage that Shook the World (link is to my earlier blogpost), argued that because some finches on Galapagos Islands changed very rapidly, we ought to see them as evidence for a young earth and recent creation. Yet Dawkins cites several examples of rapid evolution alongside more common glacial changes.