Archive for the ‘anti-science’ Category

Friendly take on alt-med

2010/04/02

The latest issue of Humanitie is now out, and with it the twin columns of the Friendly Humanist and the Not-Quite-So-Friendly Humanist.  Note to readers who have the magazine itself:  a slight editorial hiccup this issue has our columns switched – Mike’s article is attributed to me, and mine to him.  The following is my contribution.  You can read Mike’s here.

Having complementary and alternative medicine (“CAM”) as the topic of this column puts me in a dilemma.  How can I put a friendly spin on a collection of beliefs and practices that go against science and reason?  These are cornerstones of the humanist ethic.

Let’s take a very quick look at what we’re talking about.  First, the proposed mechanisms are ridiculous:  “like cures like”, chakras, chi, etc.  Second, the denigration of real medicine – of real science – that seems to inevitably accompany promotion of CAM is ignorant and dangerous.  It causes people to waste time on CAM treatments before seeking real medical advice, and makes room for even more dangerous nonsense, such as the deadly anti-vaccination paranoia.  Instead of being friendly, maybe I should be recommending that we ban all CAM practitioners from hawking their snake oil to a vulnerable public.

The only real advantage to most CAM treatments is that clients get very detailed and personal consultations.  If you’ve read about the placebo effect, you understand that our social mammal-brains are positively affected by that sort of one-on-one attention, whether or not it’s accompanied by real medicine.  It gives an air of gravitas to the water (or hand-waving or needles in the skin or whatever magical elixir is being peddled).  This encourages the brain to do its thing:  for example, reducing the sensation of pain, or soothing an inflammation.

And there lies something promising.  You see, these actual, real benefits of CAM have nothing to do with the magical beliefs of the practitioners (and clients).  In fact, even real doctors could harness this capacity for self-improvement.  If only they weren’t run ragged by overstretched health budgets, they might have time to give the same sort of deep, personal consultations.

So here’s what I’ve come up with:  the friendliest proposal I can honestly support.

Since alternatives to medicine act to erode public confidence in real science and medicine, and since this is already hurting the public health through (for example) the resurgence of vaccine-preventable diseases, let’s tax them.  The high tax on cigarettes helps pay for the damage they do to the public’s health.  Similarly, a hefty tax on CAM treatments could help pay for the damage they do to the public’s health.  We could use that money to train and hire more people to practice real medicine.

The more front-line medical staff we have, the more time each can dedicate to personalised consultations, maximising the placebo benefit of simply having the attention of an expert.  And because people would have more satisfying and effective interactions with real medicine, this would reinforce rather than erode people’s confidence in a scientific approach to knowledge and healing.

How about that!  I found something positive in that pool of intellectual chaff that is euphemistically called “complementary and alternative medicine”, and I’ve managed to lay out a plan for incorporating it into a real medicine.  All without asserting that CAM practitioners should all be tossed in the sea for polluting the arena of public discourse with misinformation and ignorance.  That was pretty friendly of me, don’t you think?

Archaeologists versus believers

2010/02/04

A friend of mine pointed out this (Dutch) story to me (an English translation is given here).  In the Netherlands – which many consider a bastion of reason and liberalism – there is a town council objecting to a scientific report because it contradicts their religious beliefs.

Staphorst is a community of very religious people (mostly Calvinists, according to Wikipedia).  Like all Dutch towns, they are required to produce a survey of archaeological sites in their jurisdiction (for a comprehensive nation-wide map of such sites).

Naturally, the survey was conducted by actual archaeologists.  It contained references to settlements 12000 years old.  That’s what the scientific evidence suggests, and I think that’s pretty cool.  Imagine learning that there are twelve thousand years of human heritage in your hometown!

But the council members (and most of the people in the town) are young-earth creationists.  That’s their right, of course.  But they want the report amended to acknowledge their beliefs – that the countryside, the planet, and the whole universe are less than ten thousand years old.

They want a report based on demonstrable, objective, scientific evidence to acknowledge beliefs that are based on religious faith.

This is repugnant to me, but rather than start flinging emotion-laden abuse around, I invite them (and any who sympathize with their actions) to consider this:

How would they feel if someone asked them to post a notice at their church pointing out that the physical evidence for a 4-billion-year-old Earth is far more comprehensive than the physical evidence for any of the amazing claims in the Bible?

I’m guessing they’d say “no”.  And that’s their right – a church is a place for building and maintaining a community  of common belief, and they should not be obliged to confront opposing beliefs within its confines (however well-grounded those opposing beliefs might be).

If they want to reject science and seek truth some other way, that’s their right.  But they have no right to insist that their unscientific beliefs be given voice in a scientific venue.

In the company of woo

2009/12/29

I find myself in the company of woo, and as a skeptic it is bringing me some grief.

It’s all about homebirth – planning to deliver a baby at home, attended by a midwife, rather than in a hospital.

Deena and I came to homebirth through an examination of the evidence. (Here’s a discussion I participated in on the Bad Science forums before Kaia’s birth.) We were convinced, by scientific studies and analyses, that planning a home birth here in the UK was at least as safe as planning a hospital birth, given a competent attendant and a handy hospital in the event of complications. So we went for it.

However, many people choose homebirth for less evidence-based reasons. They cite personal intuition, or the “naturalness” of it. Not just as reasons to prefer homebirth, but as evidence of its safety.

At Edinburgh’s Pregnancy and Parents Centre (a haven for various types of woo, as well as useful support groups and great toddler activities), when we went to the “home birth support group” to relate our experiences and our evidence-based approach, it was alongside others promoting woo of various flavours as part of their support of homebirth.

A recent post on homebirth at Science-Based Medicine has stirred up an epic-length discussion, with passionate defenders on both sides. I’ve participated, but fear that just being on the homebirth side has made me, in some people’s eyes, an advocate of woo.

This is the problem: I agree with the woo-birthers that homebirth can be safe, but I disagree (passionately, vigorously) about why this is a legitimate position. And the disagreement isn’t immaterial. At the homebirth meeting, someone recommended homeopathy to treat post-partem haemorrhage. One of the most serious and potentially life-threatening complications of pregnancy, and she advised drinking high-priced water. That is dangerous advice, and I wish I’d been quick-thinking enough to respond persuasively (rather than sitting like a lump and grinding my teeth).

What is a skeptic to do? On the one hand, having someone agree with me in one breath, and back me up with an appeal to intuition in the next, makes me want to revisit and question my beliefs that much more carefully. (That’s something a skeptic should be doing anyway, for all their beliefs, but who has the time?) On the other hand, to adapt Niven’s 16th law, “There is no belief so true that one cannot find a fool believing it.” Just because someone agrees with you for bad reasons doesn’t mean you’re wrong. I came to my belief about homebirth on the basis of the science, and I’m determined that only science will dissuade me.

But there’s also the whole social side. Just as many of my fellow atheists wrinkle their brows at me when I say I go to church, many skeptics seem to do the same when I talk about homebirth. Atheists often assume that the word “church” is synonymous with supernatural beliefs and submission to a holy text, things that would feel alien in our Unitarian church. Similarly, many skeptics assume that, because it’s associated with modern medicine, hospital-based birth is inherently safer.

I’m tempted to close by declaring, evangelist-style, that skeptics must beware of this tendency to take association as evidence. Its association with woo-birthers says nothing about the safety of homebirth; nor does its association with high-tech hospitals demonstrate the superiority of hospital birth.

But perhaps a more humble conclusion is in order. Here goes:

I promise to keep vigilant for evidence that might contradict my current beliefs.
I promise to honestly communicate any changes of position that such evidence might lead me to.
I promise to avoid being swayed by other people’s assumptions (whether or not they are skeptics).
I promise to make every effort to pin my beliefs to the evidence, and nothing else.

Homeopathy at Boots: an open letter

2009/12/02

In a move reminiscent of the very successful Australian Skeptics open letter to pharmacists, the Merseyside Skeptics Society has issued an open letter to Boots pharmacies.

This is in the wake of a parliamentary subcommittee meeting on the status and labelling of homeopathic remedies sold in pharmacies (“chemists” in this country). If you have time, check out the transcript here – a long but interesting read. (Thanks to Mike for the heads-up.) Here’s Ben Goldacre’s summary, as one of the people who gave evidence at the meeting.Link
Boots sells homeopathic products. By association, it lends medical authority to these products – which have been demonstrated, so far as good research is able to demonstrate, to be medically indistinguishable from placebos. That is, they are not real medicine, and do not replace real medicine. The will not protect you from malaria; they will not protect you from H1N1. They won’t even cure your headache. If your headache does get better after homeopathy, there are three much more likely explanations: (1) it was a random coincidence (unsatisfying, but sometimes the world works that way), (2) it was going to get better anyway (you can’t tell this from a single case, but a large study of many people could), or (3) your belief in the treatment had a real effect on your malady (a very cool possibility – see Ben Goldacre’s book Bad Science for more, or go read his blog).

Though they sell them, the Boots representative who spoke to the committee admitted that homeopathic treatments have no good evidence supporting their effectiveness in dealing with any health complaint. His best argument for selling homeopathy comes out in this excerpt from the start of the transcript:

Mr Bennett: We do indeed sell them and there is certainly a consumer demand for those products.

Q4 Chairman: I did not ask you that question. I said do they work beyond the placebo effect?

Mr Bennett: I have no evidence before me to suggest that they are efficacious, and we look very much for the evidence to support that, and so I am unable to give you a yes or no answer to that question.

Q5 Chairman: You sell them but you do not believe they are efficacious?

Mr Bennett: It is about consumer choice for us. A large number of our consumers actually do believe they are efficacious, but they are licensed medicinal products and, therefore, we believe it is right to make them available.

Q6 Chairman: But as a company you do not believe that they necessarily are?

Mr Bennett: We do not disbelieve either. It is an evidence issue.

They don’t have good evidence that they work, but people want to spend money on them. This is a disgustingly cynical attitude toward the public, and toward Boots pharmacists’ own responsibility as front-line dispensers of medicine.

I include the open letter below. I will also be contacting Boots. If you are interested in this issue, I encourage you to do the same.

An Open Letter to Alliance Boots

The Boots brand is synonymous with health care in the United Kingdom. Your website speaks proudly about your role as a health care provider and your commitment to deliver exceptional patient care. For many people, you are their first resource for medical advice; and their chosen dispensary for prescription and non-prescription medicines. The British public trusts Boots.

However, in evidence given recently to the Commons Science and Technology Committee, you admitted that you do not believe homeopathy to be efficacious. Despite this, homeopathic products are offered for sale in Boots pharmacies – many of them bearing the trusted Boots brand.

Not only is this two-hundred-year-old pseudo-therapy implausible, it is scientifically absurd. The purported mechanisms of action fly in the face of our understanding of chemistry, physics, pharmacology and physiology. As you are aware, the best and most rigorous scientific research concludes that homeopathy offers no therapeutic effect beyond placebo, but you continue to sell these products regardless because “customers believe they work”. Is this the standard you set for yourselves?

The majority of people do not have the time or inclination to check whether the scientific literature supports the claims of efficacy made by products such as homeopathy. We trust brands such as Boots to check the facts for us, to provide sound medical advice that is in our interest and supply only those products with a demonstrable medical benefit.

We don’t expect to find products on the shelf at our local pharmacy which do not work.

Not only are these products ineffective, they can also be dangerous. Patients may delay seeking proper medical assistance because they believe homeopathy can treat their condition. Until recently, the Boots website even went so far as to tell patients that “after taking a homeopathic medicine your symptoms may become slightly worse,” and that this is “a sign that the body’s natural energies have started to counteract the illness”. Advice such as this directly encourages patients to wait before seeking real medical attention, even when their condition deteriorates.

We call upon Boots to withdraw all homeopathic products from your shelves. You should not be involved in the sale of ineffective products, because your customers trust you to do what is right for their health. Surely you agree that your commitment to excellent patient care is better served by supplying only those products whose claims can be substantiated by rigorous scientific research? Or do you really believe that Boots should be in the business of selling placebos to the sick and the injured?

The support lent by Boots to this quack therapy contributes directly to its acceptance as a valid medical treatment by the British public, acceptance it does not warrant and support it does not deserve. Please do the right thing, and remove this bogus therapy from your shelves.

Yours sincerely,
Merseyside Skeptics Society

—–

Other blogs and websites have noted this, including Skepchick, The Not Quite So Friendly Humanist, Bruce Hood, Bad Science, A Glasgow Skeptic, RichardDawkins.net, Bad Homeopathy, and New Humanist.

Also, various newspapers have picked up on Boots’ strange position: The Telegraph, Daily Express, Daily Mail, Guardian (and Ben Goldacre again, and their liveblog of the meeting), Times, and Mirror.

Feel free to comment and link to any I’ve missed.

Defending Dawkins

2009/09/25

I recently came across Bettynoirbettyblanc’s blog, and this post in particular, where she discusses her problem with Richard Dawkins. I was composing a response to post in the discussion, but it grew into something a little long for a comment. Here it is, with relevant excerpts from her post.

In the post, Betty discusses her take on Richard Dawkins – a man who, for good or ill, is the first person people think of when atheism is mentioned in Britain, especially in connection with evolution. I encourage you to read what she writes before continuing here, as I will not cover all of what she says, nor present her thoughts in the order she does.

Why do I find him interesting? I just wonder about his dogged obsession with religion and with those that practice it. He is a scientist and yet he seems to spend [much] of his time trying to argue that following a religion is at best ridiculous and at worst positively harmful. I just don’t understand why.

I’ve read several of Dawkins’ books, and I think that this misrepresents him. While I think his tone regarding religion is not particularly helpful, it’s worth noting that of the ten popular books he has written, only one is about religion (yes, it’s The God Delusion).* Not exactly a dogged obsession. More of an unavoidable side-note for someone in his field who wishes to engage the public.

A whopping 40% of Americans are creationists and Dawkins compares them to holocaust deniers. This is highly offensive. A holocaust denier is someone who twists the facts of the historical record in order to bolster a racist agenda. These people are motivated by their hatred of Jews. The facts do not matter. For a creationist, evolution has not been proven beyond reasonable doubt. There are questions about the theory that they believe have not been adequately answered. They believe the story of creation not in order to further a hate campaign, but as part of a belief system.

While I wouldn’t personally choose to compare evolution-deniers to Holocaust-deniers, I understand Dawkins’ choice of such an analogy. First, it is accurate inasmuch as both holocaust-deniers and evolution-deniers reject the overwhelming preponderance of evidence in favour of a position that is based entirely on ideology. As Betty says, they “twist the facts of the historical record in order to bolster an agenda. … The facts do not matter.” At least that part applies equally well to both sorts of deniers.

For someone in Dawkins’ position – someone who has spent his life working to learn more about our biological origins – it is certainly understandable that he will view creationists as the enemy. He feels passionately about his work. Every one of his books that I have read (even, at times, The God Delusion) bursts with enthusiasm about what we, as a species, have learned about our origins through dogged scientific effort. He has committed his life to this pursuit. He has submitted himself to the scientific community, which tends to be ruthless in its attempts to disprove new ideas, and which only accepts them after repeated failures to disprove them. (One prominent example is the idea introduced in the mid-19th-century that the diversity of species is due to the accumulation of small changes accumulated over time and channelled by natural selection.)

Not only that, but for much of Dawkins’ career he has also engaged in the admirable task of sharing this wonder and these discoveries with the public, in his very readable and accessible books of science.

Creationists belittle not only Dawkins’ work, but the careful work of hundreds (thousands?) of scientists leading back to Darwin. They belittle it without any good arguments, without any good evidence, and usually with a complete failure to grasp the evidence they’re trying to refute.

They are not interested in submitting themselves to the rigours of science. They are not interested in letting the evidence rule on which answer is right. Their actions suggest that they are only interested in convincing everyone that the scientists are wrong (and/or evil) and that we should set science aside in favour of their ideological commitment to a disproven belief. (I’m referring there to young-earth creationism and ID, not religion in general.)

Either he wants people to know about evolution and to ‘convert’ the creationists or he just wants a nice argument to bolster his book sales. I think if it was the former then he would be wise to act in a more conciliatory manner, and watch his language (ie the use of the word ‘ignorant’, I would also like to point out at this point that some of the people I know who are most knowledgeable about evolution are in fact creationists).

While it may not be nice of him to call evolution-deniers “ignorant”, it is difficult to see how the term is wrong. The only way to confidently proclaim evolution false is to set aside (deliberately or in ignorance) the entire geological, molecular, geographical, and experimental bodies of evidence that support evolution. Though I’m sure most creationists’ motivation for this is simply to carry on believing what they wish to believe, not to promote hate (has Dawkins or anyone else ever claimed that?), that doesn’t change the facts. One has to remain ignorant (ie, not knowing of or understanding the evidence) to honestly deny evolution. (I can’t say much about the claim that “some of the people [Betty knows] who are most knowledgeable about evolution are in fact creationists”. Would they seem knowledgeable to a biologist, or only to someone like Betty who confesses little understanding of or interest in the science behind this “debate”?)

I can’t verify much of what he says because I don’t have access to the research or fully understand the terms and the processes involved. It’s been a long time since I did higher biology and chemistry! I suspect that for most of his vociferous cheerleaders on websites and forums across the globe, this is also the case. Perhaps they don’t wish to seem stupid for questioning?

In this respect, I find his followers similar to those of religious faiths. They are taking what he says at face value because they believe in him. They may well be correct – I don’t know. The argument seems reasonable, but who knows?

Is that a rhetorical question, “who knows?” Because there’s an obvious answer. The actual biologists (ie, people who dedicate their lives to understanding this stuff) know. And a good number of them have produced books that Betty and I and any of our readers can understand. These outreach biologists (Dawkins, Gould, Wilson, etc) don’t make arguments of the form “I believe this, and I’m and expert so just take my word for it.” They make arguments of the form “Here’s some evidence. Here’s why it supports evolution.” With plenty of references to original research so that you can independently verify their claims if you don’t trust them.

On the other side of the issue, I have read creationist apologists like Lee Strobel and John Blanchard argue for an evolution-denying ideology. They consistently fail to accurately represent the case for evolution, and then inexpertly demolish the straw men they have invented. (I’ve discussed Blanchard’s attempt here. Strobel is being taken apart in exquisite detail by Ebonmuse here.)

So, the supporters of evolution rely on the evidence, occasionally spending some time pointing out the flaws in the deniers’ arguments. The deniers of evolution paint caricatures of the evidence, attack the caricatures, and pretend that they’re doing science too. They don’t do real science: they don’t make falsifiable predictions, and they certainly don’t do experiments to test them.

When I read Dawkins, I can trust that most of what he says about science is based on the scientific method. He’s reporting conclusions that have been carefully tested, which qualified people have tried and failed to disprove. I take what he says at face value because I trust the procedure that has been followed to arrive at those conclusions. When I look further, the people who are qualified to understand the evidence all tend to agree with him.

On the other hand, he clearly isn’t speaking as a scientist in many of his comments about religion, and so I don’t take them at face value. In fact, I often disagree with him, vocally, in settings where that sets me apart (ie, among other humanists). I’m not treated as stupid for questioning because my humanist acquaintances – like Dawkins, like most atheists and humanists – value questioning. We believe that any claim should be open to question, no matter how popular it is. If the question has nothing to back it up – no evidence to motivate a shift in our beliefs, then we set it aside. But if the questioner has a sound reason for dissenting from popular opinion and solid evidence to back up their dissent, then that dissent spreads.

It was that sort of questioning that led to Darwin’s great breakthroughs. It is that sort of questioning that has led to every refinement and revision in the theory of evolution since then. It is that sort of questioning that has driven science for the past few centuries, with countless concrete benefits as proof of the process.

And, although religion is not uniformly anti-knowledge or anti-progress, the opponents of science have almost uniformly been religious.

Worse, I believe his words convert more people to fundamentalist ideas than anything else as they engender a sense of victimhood and persecution amongst those who don’t agree with what he says.

I would object to the use of the term “fundamentalist” here, as it seems completely divorced from any useful definition I’ve come across. But yes, to the extent that he overstates the religious antipathy to science, and exaggerates the incompatibility of science and religion, he does encourage an unhelpful us-versus-them mentality among atheists, and it’s one that I try to combat where I can. There are many, many religious believers who have nothing wrong with atheists or with evolution. Many of them are acquaintances and friends of mine.

Recent centuries and decades have seen a dramatic reduction in institutional discrimination against the non-religious. Keep in mind, however, that “victimhood” is not always an inappropriate feeling. Sometimes you are a victim, and you need to be aware of it. Some laws favouring religious over non-religious belief still remain, even in the enlightened West (even in uber-secular Finland). Dawkins is a scientist, and as Betty says, 40% of Americans deny the evidence that is at the foundation of his field. To the extent that they try to challenge the teaching of that science in schools, and seek to warp people’s perceptions of it in universities (for example, see this development), there is a concerted attack on precisely the field of knowledge Dawkins has devoted his life to. It’s worth noticing and acknowledging that scientists (and everyone who benefits from their work) are victims of the creationists’ campaign of science-denial. That way we can do something constructive to counter it.

I really don’t like my first mention of such an apparently pleasant person as Betty to come off so negative and critical. (I enjoyed this post of hers, and this one.) I hope that I have made it clear that Dawkins has by no means a free pass to my credulity, particularly when he talks about religion. Whether that helps encourage her to look deeper into the whole evolution/creation thing is up to her.

I hope Betty will respond to what I’ve said, either in the comments here or on her own blog post (where I’ll point her to this post). And of course, anyone else who agrees or disagrees with either of us is invited to comment too.

—–

* From the same list of publications, using just the titles as a guide, I count no more than 8 of 16 popular articles dealing with religion (at least 11 of the 16 have a scientific slant), and only 3 of 30 academic articles can plausibly be said to be about religion, the remainder being biological. So, out of 56 items listed, no more than 12, or about 21%, are about religion – most of these being popular articles. At least 48, or about 86%, deal primarily or exclusively with science. (Totals exceed 100% because some articles seem to deal with both science and religion. Also note that I think one or two articles appear both in the scientific and the popular list.) Readers can decide whether this amounts to a “dogged obsession with religion”. Perhaps the dogged obsession belongs to those apologists who wish to diminish his influence, Dawkins being a well-known and widely-respected public figure.

WHO rejects homeopathy

2009/09/18

The WHO has publicly stated that homeopathy is not a good way to treat serious diseases such as tuberculosis, malaria, and HIV. This is excellent. Placebo and hydration are the only medically-measurable effects that homeopathic “remedies” exhibit, and these are not effective in combating serious diseases. It is encouraging that an international health body like WHO is willing to publicly side with the evidence on this.

Thanks to Steve Novella at Neurologica for this bit of news.

Does Blanchard understand evolution? (2 of 5)

2009/08/03

This is the second part in a series discussing John Blanchard’s book, Does God Believe in Atheists? In this post, I discuss his presentation of the theory of evolution. If you missed it, you may want to read the introductory post first.

In order to keep this post as short as possible, I provide links from this post to two of the most accessible and useful online sources of information on evolution: Wikipedia and the Talk Origins Archive. Links to the Talk Origins pages use a small (TO). All other links in this section are to Wikipedia articles. Please follow them for substantiation of my claims.

The scientific consensus on the basics of evolution is sound. It is based on mountains of empirical evidence, including molecular (genetic) evidence, comparative physiology and geographical distributions, and fossil evidence.

Even so, some people – particularly members of certain religious groups – remain unpersuaded. Blanchard is one of those people.

At one level, the existence of a god is a completely separate question from the manner in which life has developed over Earth’s history. So for someone to raise the topic of evolution in an argument against atheism means one of two things: either they believe in a conception of a god that conflicts with the physical evidence on which evolutionary theory is based, or they have an impression of the theory of evolution as something other than what it actually is. Or both.

It’s clear early on that Blanchard is guilty of at least the second error:

No longer limited to biology, evolution has become a total philosophy which claims to explain the origin and development of everything within a closed universe, and thereby to rule out the existence of God. (p83) 

No, no, and no.

No, the theory of biological evolution that got its start with Darwin and Wallace has not become a philosophy, nor come to encompass other disciplines. It remains a theory about how species change over time. Other uses of the term evolution in science include chemical evolution (abiogenesis) (TO), stellar evolution, and galaxy formation and evolution. These are separate topics; the evidence supporting them is largely separate from the evidence supporting (biological) evolution.

No, none of these theories, either individually or taken together, explains the origin and development of everything. That is one of the goals of science, but no credible scientist claims to have achieved it yet.

And no, sciences do not rule out the existence of God (TO). They may, in their progress, disprove (or cast reasonable doubt on) certain claims made by humans on behalf of God – such as a geocentric universe, a young Earth, separate creation of similar species, and so forth. And of course, people can extrapolate beyond the science. Dawkins points out that “Darwin made it possible to be an intellectually fulfilled atheist,” because it revealed an alternative to the argument from design.

Blanchard goes on to present misleading arguments that are tiresomely familiar to those who care to learn about evolution.

For example, he describes Piltdown Man (TO) and Nebraska Man (TO) – famous hoax fossils. He plays down the fact that it was scientists, judging the evidence in light of evolutionary theory, who established them as hoaxes. With these and other examples, Blanchard declares that the fossil evidence is not enough to establish common descent.

I suspect he’s wrong, but whether he is or not, there’s a far more obvious flaw in his reasoning.

He’s implying that fossils are the crucial evidence for evolution. They aren’t. They never have been. In the The Origin of Species, Darwin focused on morphological patterns of relatedness and geographical distribution in modern species and genera (see here and here) – patterns which remain unexplained except in the light of common descent. Modern biologists spend much of their time with molecules: the genetic code confirms patterns of descent predicted by Darwin’s earlier methods.

Fossils are wonderful. They invariably support an evolutionary explanation of species development. And, in showing what animals (and occasionally plants) actually looked like, they satisfy human desires for a physical manifestation of the past. But organisms only fossilize under particular, rare conditions (TO). So we expect “gaps”. Even Darwin was aware of them, and (correctly) didn’t feel they undermined his argument. Fossils neither make nor break evolutionary theory; they simply support it.

In summary, Blanchard colossally fails to demonstrate a basic knowledge of why evolution is accepted by biologists. Without that knowledge, he has no hope of persuading a moderately-informed audience that there are deep flaws in evolutionary theory.

So far, he’s failing to engage this atheist; he’s just making me seriously doubt the rigour of his research.

Next up: Does Blanchard understand humanism?

Spinal Trap rebroadcast

2009/07/31

On Wednesday, a large number of online and print sources showed solidarity with Simon Singh by reprinting his critique of the British Chiropractic Association. They have removed the allegedly libellous portions – I invite you to read them, then the original, and decide whether the substance is different.

Here is a list of blogs that have reproduced the article, as compiled at Sense About Science.

Although I’m late joining in, I hereby offer the same service: a reproduction of the original article. Like most others, I’m omitting the allegedly libellous lines.

Let me be clear: I do not think they are libellous. I think the BCA’s case is a cowardly attack meant to silence a critic, not a legitimate attempt to protect itself from malicious falsehoods. But I do not have the means to mount a defense should the BCA come after me. In my case, their cowardly tactics work. (That is one reason why the law must change.)

But, as I said, I think the substance of the article is unchanged by the omission (further evidence of the ridiculousness of their accusation). So here it is, as presented on the Sense About Science site:

Beware the spinal trap

Some practitioners claim it is a cure-all, but the research suggests chiropractic therapy has mixed results – and can even be lethal, says Simon Singh.

You might be surprised to know that the founder of chiropractic therapy, Daniel David Palmer, wrote that ’99% of all diseases are caused by displaced vertebrae’. In the 1860s, Palmer began to develop his theory that the spine was involved in almost every illness because the spinal cord connects the brain to the rest of the body. Therefore any misalignment could cause a problem in distant parts of the body.

In fact, Palmer’s first chiropractic intervention supposedly cured a man who had been profoundly deaf for 17 years. His second treatment was equally strange, because he claimed that he treated a patient with heart trouble by correcting a displaced vertebra.

You might think that modern chiropractors restrict themselves to treating back problems, but in fact some still possess quite wacky ideas. The fundamentalists argue that they can cure anything, including helping treat children with colic, sleeping and feeding problems, frequent ear infections, asthma and prolonged crying – even though there is not a jot of evidence.

I can confidently label these assertions as utter nonsense because I have co-authored a book about alternative medicine with the world’s first professor of complementary medicine, Edzard Ernst. He learned chiropractic techniques himself and used them as a doctor. This is when he began to see the need for some critical evaluation. Among other projects, he examined the evidence from 70 trials exploring the benefits of chiropractic therapy in conditions unrelated to the back. He found no evidence to suggest that chiropractors could treat any such conditions.

But what about chiropractic in the context of treating back problems? Manipulating the spine can cure some problems, but results are mixed. To be fair, conventional approaches, such as physiotherapy, also struggle to treat back problems with any consistency. Nevertheless, conventional therapy is still preferable because of the serious dangers associated with chiropractic.

In 2001, a systematic review of five studies revealed that roughly half of all chiropractic patients experience temporary adverse effects, such as pain, numbness, stiffness, dizziness and headaches. These are relatively minor effects, but the frequency is very high, and this has to be weighed against the limited benefit offered by chiropractors.

More worryingly, the hallmark technique of the chiropractor, known as high-velocity, low-amplitude thrust, carries much more significant risks. This involves pushing joints beyond their natural range of motion by applying a short, sharp force. Although this is a safe procedure for most patients, others can suffer dislocations and fractures.

Worse still, manipulation of the neck can damage the vertebral arteries, which supply blood to the brain. So-called vertebral dissection can ultimately cut off the blood supply, which in turn can lead to a stroke and even death. Because there is usually a delay between the vertebral dissection and the blockage of blood to the brain, the link between chiropractic and strokes went unnoticed for many years. Recently, however, it has been possible to identify cases where spinal manipulation has certainly been the cause of vertebral dissection.

Laurie Mathiason was a 20-year-old Canadian waitress who visited a chiropractor 21 times between 1997 and 1998 to relieve her low-back pain. On her penultimate visit she complained of stiffness in her neck. That evening she began dropping plates at the restaurant, so she returned to the chiropractor. As the chiropractor manipulated her neck, Mathiason began to cry, her eyes started to roll, she foamed at the mouth and her body began to convulse. She was rushed to hospital, slipped into a coma and died three days later. At the inquest, the coroner declared: ‘Laurie died of a ruptured vertebral artery, which occurred in association with a chiropractic manipulation of the neck.’

This case is not unique. In Canada alone there have been several other women who have died after receiving chiropractic therapy, and Edzard Ernst has identified about 700 cases of serious complications among the medical literature. This should be a major concern for health officials, particularly as under-reporting will mean that the actual number of cases is much higher. If spinal manipulation were a drug with such serious adverse effects and so little demonstrable benefit, then it would almost certainly have been taken off the market.

Simon Singh is a science writer in London and the co-author, with Edzard Ernst, of Trick or Treatment? Alternative Medicine on Trial. This is an edited version of an article published in The Guardian for which Singh is being personally sued for libel by the British Chiropractic Association.

When ridicule is all an idea deserves

2009/07/29

Check out this awesome video of an Irish comedian, on alternative medicine and affiliated topics (thanks to Mike, The Not Quite So Friendly Humanist, for pointing it out):

Homeopathy awareness

2009/06/16

Steve Novella at the Neurologica blog just pointed out that this is the British Homeopathic Association’s “Homeopathy Awareness Week”.

He is right – I think we all need to be more aware of just how homeopathy can affect our lives. I encourage you to read Steve’s post, which gives a quick history and an overview of what homeopathy entails. (See also the Science-Based Medicine blog.)

I also encourage you to look at what the carefully-assembled evidence from multiple scientific studies has to say about homeopathy. I recommend Ben Goldacre at Bad Science for this – here’s a list of his Bad Science blog posts about homeopathy, and here’s a particularly good overview. Also, anyone who can’t imagine that their experiences with homeopathy could be “just placebo effects” should really listen to his two-part programme on the BBC about the placebo effect. You don’t need to look to homeopathy for some mind-blowing, magical-seeming effects. There’s plenty in the real world of scientific medical research. And read his book, Bad Science.

Bottom line: Real medicine is about proving something is safe and effective, and abandoning it as soon as it is shown to be either unsafe or ineffective.

Alternative medicine is about believing something is safe and effective, and rejecting, ignoring, or suppressing any evidence to the contrary.

It hurts people. It hurts people because alternative practitioners encourage distrust of real medicine in general. It hurts people because they take homeopathic treatments instead of real medicine. See for example this tragic story about Gloria Thomas Sam, a nine-month-old girl who died horribly because she was given homeopathic treatment rather than real medicine for eczema. Eczema!

Real medicine isn’t infallible. But its researchers abide by strict rules of evidence: something must be proven both safe and effective before it is used in medical practice. Real medicine is self-correcting.

Homeopathy, and most alternative “medicine” modalities, are not self-correcting.

I encourage everyone – adherent, opponent, and uninterested layperson – to become a little more aware of homeopathy this week.

Photo credits:

Bad Science cover art from Bad Science blog (assumed fair use).

Water memory poster from Hell’s News Stand (adapted from a less politely-worded version; also available with a G rating). Published with invitation to redistribute.


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