Phil Plait - Don't Be A Dick from JREF on Vimeo.
torsdag 7 oktober 2010
Phil Plait - Don't be a Dick
tisdag 14 september 2010
Microwave Ovens
Having grown up in Järna, which may be the most pseudoscience-dense place in Sweden I have learned that microwave ovens are dangerous and that it kills your food (yes that is the term you normally hear).
Their arguments, of course, rely heavily on the naturalistic fallacy i.e. they claim that heating using microwaves is somehow "unnatural", that is unlike conventional oven which they seem to consider "natural". It is as if electromagnetic radiation in the infrared spectrum is somehow more natural than electromagnetic radiation with microwave frequencies.
There are however also some more empirical claims used by people who are against microwaves. For example many people quote a "study" where they compared growth of plants which had received either microwaved water or water which had not been heated. It is claimed that the plants which got the microwaved water waned down and died. The plants which had just gotten normal water on the other hand flourished. According to microwave critics this shows that microwaving water takes out some sort of "life energy" out of the H2O molecules and therefore the plants die.
Another empirical claim that microwave antagonists sometimes use is that microwaves are forbidden in Russia because they are so dangerous – this is just a simple lie.
One claim with some actual research behind it is that microwave ovens destroy certain vitamins in your food (see here for example). This claim is probably true but only if you compare microwaved food with raw food. The study quoted on health bulletin shows that meat heated in microwave ovens has 30-40% less vitamin B12 than raw meat. So if you start eating your steaks raw you can skip a glass of milk a day (which would otherwise compensate the loss).
In the same study you can find the following paragraph:
"Microwave ovens are widely used for cooking and food processing. Extensive studies (Cross and Fung, 1982; Hoffman and Zabik, 1985) have shown equal or better retention of some vitamins (B1, B2, B6, C, and folic acid) after microwave heating compared with conventional heating."
In other words, if you lack vitamins, cooking in your microwave can help you.
It is also interesting that otherwise environmentally conscious people are so against microwave ovens even though they save a lot of energy compared to conventional ovens.
So where does all this leave us? My conclusion is that microwave heating is a fast and convenient way of cooking. Don't put eggs or metal in there and don't overheat things so that you burn yourself. If you follow these guidelines a microwave oven will be a terrific assistant in your kitchen. Of course some things just taste better when you cook them in a conventional oven and in that case I am all for that…
If you want more on this topic I can recommend this episode on Brian Dunning's skeptoid.
lördag 24 juli 2010
My favorite podcasts - Best podcasts
lördag 6 mars 2010
The placebo response as a form of classical conditioning
onsdag 13 januari 2010
Our tiny planet in our huge Universe
Our earth is a pretty big place, yet planets such as Saturn and Uranus are much bigger. Jupiter, however, is larger than all the other planets in our solar system combined into one planet - now that is big. Compare Jupiter to our sun and Jupiter looks like a pea next to
football, put another way - the sun is huge and massive! Still, our sun, which we rely on so intimately, is one of a hundred billion stars in our massive galaxy "the milky way". The Milky Way is a hundred thousand light years across - meaning that it takes light 100.000
years to reach us from the other end of the galaxy (yet the light can whizz around the earth 7 times in one second). Our sun, which is huge, is not even close to one light year across - rather it is about one light minute...
Our huge Milky Way galaxy containing a hundred billion stars and with a diameter of about 100.000 light years is small compared to the local cluster of galaxies (a small cluster of half a dusin galaxies), which measured millions of light years across.
Still, theory suggests that our 28 billion light year observable universe is just a small fraction of the true size of the universe (we cannot see the whole universe because galaxies far away may be travelling away from us faster than the speed of light in which case their light will never reach us). Maybe the observable universe is just "one billionth" of the size of our true universe.
At last - many theorists believe that our universe, in which we are much smaller than a grain of sand in the Sahara dessert, is but one out of a large number of universes...

I don't know about you, but these numbers make my heart beat faster. I feel small and improbable, but also grand, lucky and inspired - it turns all my daily woes into experiences - I feel lucky for having experienced what it feels like to be sad, angry or happy - I feel
lucky for being able to study all the grand aspects of nature - from our huge universe to our fantastic brains.
måndag 14 december 2009
Monkey's sacrifice their juice to watch "porn"

söndag 26 juli 2009
What should you believe in? Shermers Baloney detection kit
- How reliable is the source?
- Does the source often make similar claims?
- Has the claim been confirmed elsewhere?
- Does the claim fit with the way the world works?
- Has anyone tried to falsify the claim?
- What does the majority of the evidence point to?
- Is the source basing their claim on science?
- Is there positive evidence in favour of the theory (or is it only negative evidence)?
- Does the new theory account for as many phenomenon as the old theory?
- Are personal beliefs or ideologies drive the claim?
tisdag 21 juli 2009
Cognitive dissonace, therapy, UFO's wine and how to get loyality

Imagine you are a college student who has agreed to participate in a psychology experiment. When you come to the lab you are asked to perform the most boring task you have ever tried, you are extremely bored but you still complete the experiment so that you do not have to come back another time to do another experiment.
After you are done the experimenter tells you that there is another participant waiting outside and that it would be terrific if you could try to convince him or her that the task is fun and interesting and thereby increase motivation a little bit. Since you are a nice person and don't want to block psychological research you agree to this.
Alternatively, after the experiment you are asked whether you would like to convince the next participant that the experiment is fun and interesting and (crucially), you are offered 20 dollars for agreeing to this...
Now how do you think the average person would think and act in the two situations described above? Would you put in more effort if you were paid than if you were not paid? Interestingly, most participants put in a lot more effort in convincing the next participant that the experiment was fun and interesting if they had been given no money! Why? The reason is "cognitive dissonance" (a term first coined be Leon Festinger forces the participants to actually believe that the experiment was fun and interesting. After all, why would I stand here and convince a stranger that an extremely boring task is actually fun and interesting...? Do I get paid...? No! Well, I guess it is because I did in fact enjoy the tasks a little bit... hmmm... yeah, it was indeed great fun... and very interesting as well... that must be it.
Cognitive dissonance refers to the unpleasant state in which your behavior is in dissonance (does not agree) with your beliefs or thoughts. "This experiment was extremely boring (belief)" and "convincing someone that it is fun and interesting (behavior)" does not go well together. Either you have to change your behavior (which is sometimes impossible if you have already done it), or you change your beliefs (which is what most people does). The third alternative is to live knowing that you acted in a way that contradicted your beliefs - hypocrisy.
Indeed when participants were later asked whether they enjoyed the experiment or not, the ones who did not get paid claimed that it was much more fun that the participants who received payment. After all, the paid participants only tried to convince the next participant because they were paid - no dissonance there...
What does this have to do with loyalty? Here is a lesson. If you are going to start an organization or a political party or whatever, and if you need some people who are loyal and energetic about the business, do not pay them... If you pay them, then in their head they can say to themselves that I am doing it because of the money. If they do not get any money, they can only say to themselves that I am doing this because I like it - and that is the best type of employee or member.
Another example: Say that you are a therapist or some sort of advisor. If you want people to value your service, take high fees! If you do this your patient or client will think to themselves "why am I paying so much money for this", well I guess that it is because it is so damn good, after all, who pays a lot of money for therapy that isn't really working or an advisor who does not give good advice? Some people do of course, but it will be very difficult to admit that to yourself, it is easier to think that the service you got was worth the money, that way you avoid cognitive dissonance.
Leon Festinger, the inventor of the term "cognitive dissonance" in his book "When prophecy fails" used the example of a doomsday cult who was expecting the end of the world. Festinger infiltrated this group lead by Mrs.Keech. The group believed that the earth would end in a great flood before 21st of December, 1954. Everyone on earth was going to die except this little cult of true believer who was going to be picked up by a flying saucer on the 20th of December 1954. Before midnight the group gathered outside, waiting for the flying saucer. When the clock turned 12AM, nothing happened... but wait, there was another clock which was only 11.55. So they wait another 5min, but still nothing happened... Mrs.Keech cries... The groups’ waits outside until 4AM when suddenly Keech receives a message saying that this little group of true believers managed to change God's mind - and that therefore he (or she) would not flood the earth after all... A nice solution to the dissonance that would otherwise make them feel very very stupid. Rather than admitting that they were simply wrong, the group decided to believe in an ad hoc story that would make sense of things
One last example (apparently this is true only for trained wine tasters and not for lay persons):Experiments show that expensive wines taste better than cheap wines, even if the different bottle contains exactly the same wine... Why? Because no one wants to be the person that goes out and buys an expensive bottle of wine that is no better than a cheap bottle, that would be stupid and no one wants to be stupid...
lördag 11 juli 2009
When is butter no longer butter?

söndag 28 juni 2009
2,5 Billion(!) dollars spent on search for alternative therapies...

måndag 1 juni 2009
Truth about the Atkins diet...

Would you like to be able to eat dishes such as the one above, and get thin at the same time? According to Robert Atkins, the man behind the infamous "Atkins diet", you can. I have quite a few acquaintances who have tried the Atkins diet and quite a few of those say that it has worked rather well for them. I also know of people on whom the diet did not have a huge effect, but perhaps they have not been very disciplined?
By nature I am skeptical of anything that sounds extraordinary, and when someone comes and claims that you can eat as much meat,fat sauce, cream, chicken etc etc as you like, AND lose weight, that, to me, is an extraordinary claim! Sometimes such radical claims turn out to be right, however most of the time they are wrong...
The bottom line of the Atkins diet is quite simple: avoid carbohydrates, especially fast carbohydrates, anything else is pretty much alright. To be a bit more precise you are supposed to avoid foods that have a high "glycemic index" or GI. Products that increase your blood sugar fast have high GI (examples would be sugar, white rice, pasta, beer, etc).
According to Atkins (see picture below), his diet works because the body requires carbojydrates to store fat, in other words, if there are no carbohydrates the fat will go right through the body. This is also why, according to Atkins and his followers, you can eat as much as you like, be it the ordinary 2000 calories or even 4000 calories in one day, and you will still loose weight.
So what is the truth here? I am of course no expert on these matters, but it seems to me that accumulating evidence clearly suggests that although the Atkins diet may work, it doesn`t do it the way Robert Atkins thought it did. Rather, the Atkins diet works because you eat less when you are on it. It turns out that when the brain decides whether we are hungry or not, and in extension whether we should crawl over to the fridge and get a slice of pizza, one factor that is taken into account is peptide YY. If there is a lot of peptide YY in the body then you are full, if there is little you should eat. What causes the release of peptide YY? You guessed it, proteins does, but not carbohydrates. This means that if you eat say 1500 calories of protein then you get a lot of peptide YY and therefore you feel full and stop eating. However, if on the other hand you eat 1500 calories worth of potatoes, little peptide YY is released and therefore will still feel hungry and unless you are one of those people with amazing self control, you will keep eating... Read more about this in this article from the economist.
The conclusion that the Atkins diet works because you eat less and not because you stop storing fat has been further confirmed by a recent large Harvard study. In this study they had their subjects eat the same amount of calories, but varied the source of those calories. Some subjects were given mostly carbohydrates, some were given mostly fats, and some were given mostly protein - but all got the same number of calories. Who lost most weight? According to Atkins theory, the fewer carbohydrates you eat, the more you should loose in weight, but this was not the case. The results showed that all the different groups lost equal amounts of weight.
So the bottom line of all this is that if you want to loose weight, eat less calories. One way to achieve this is to eat a lot of protein and little carbohydrates, because you will not be as hungry...
söndag 31 maj 2009
Lecture with Philip Zimbardo - How good people become evil
fredag 20 mars 2009
The pope: condoms don't help against HIV

It is perhaps old news that the Catholic Church is not a fan of condoms; however, they are rarely as blunt about it as the other day. Pope Benedictines, a man who seems to be dreaming of past times (medieval times), has now publicly announced that condoms is not the way to go if you want to stop HIV. Indeed, the pope is even claiming that condoms make the problem worse because people have more sex.
What evidence does he have for this claim? None, of course, the Catholic Church does not seem to know what evidence means. Their method for finding the truth is asking the pope and whatever he says is the truth, never mind that there are numerous studies showing that the pope is simply wrong in his statement.
Rarely does the distinction between the scientific method and the catholic (or religious) way become so clear. Do you want to trust what the pope says just because he is the pope, or do you want to trust people who have actually gone out and looked at the effects of condom use? Know that choosing the latter will make you a heretic in the eyes of the Catholic Church. Religion or Science? Irrationality or Rationality? Your choice...
söndag 7 september 2008
Popular fallacies of alternative and complementary medicine

In the most recent issue of the magazine "Skeptic", Harriet Hall, also known as "SkepDoc" writes about three fallacies that you will encounter very frequently if you engage in discussion about alternative or complementary medicine. I will of course not plagiarize Hall's article, but what I am writing here is her article, filtered through my brain (I have written about related matters here and here)...
The fallacies that you will inevitably hear are the following three;
(1) It is "natural" (and hence better for you)
(2) It has been used for a long time (and if it didn't work people would have stopped using it)
(3) It works for me (or a friend or a spouse or a friend of a friend...)
So natural is good by default ehh? In this form the statement sound very categorical, and hence, put in this fomr, the claim can be falsified by a single unambiguous counter-example, and there are plenty... Curare, a compound extracted from nature (and thus a natural compound?) will paralyze you and hence is not recommended unless you need to be still during a surgery. There are many different, naturally growing mushrooms, which will kill people who try to eat it. There is also the fen-phen scandal where a product which was advertised as an alternative medicine was later shown to have severe side effects, despite the fact that the active ingredient was "natural".
Ok, sure, there are a few extreme counter-examples, but still, isn't natural products better in general? Well this is certainly debatable and I would not jump to verdict just yet, however, the evidence to date actually tells the opposite story, namely that natural is often worse than "synthetic" (or whatever you won't to call it). Plants which are sprayed with pesticides are protected from potential predators and therefore they can use all their energy to grow. Now that I think of it, it is rather similar to us humans, in peacetime we can spend our energy on building schools and being nice to children and that sort of stuff... Plants which are not sprayed are not given their protection and therefore they have to use allot of energy on chemical warfare (or the plant-equivalent thereof). Basically they produce chemicals which will make the predator (us), sick.
But don't synthetic pesticides make you sick too? In large quantities they might (just like natural pesticides). However, pesticide control is rather strict and the chemicals used are tested so that they are of minimal danger to us... I have written more about this issue here.
The second argument says that if something has been used for a long time then it is because it is good. Again there are many counterexamples. Some people persist in using astrology even though it has been falsified over and over again. Astrologers cannot do what they claim to be able to do, and add to that the fact that their quackery is based on an astronomical model that is very out-dated. Still people are still using it… If we would have strictly gone by the "old is good" rule we would still be drilling holes in people's head to relieve headaches (here you can buy your own drill kitJ), and what about all new techniques and medicines that are developed? Are we to discard them because they are new? The fact of the matter is that we cannot rely on tradition. The way to test whether a therapy is good or bad is to do a proper, scientific test where it is possible to isolate the effect of the medicine from other factors such as placebo.
The last argument (it works for me), is the one that I have most sympathy for. In my opinion we should have respect for individual differences as well as the power of people's belief to cure them or at the very least make them feel better. If someone starts taking extra vitamins to bolster their immune system and then they do not get sick for a long time then everything is great (as long as they don't overdose which could be dangerous). Similarly, when I tell people that I am studying the brain I am often told about some therapy or mental training that I have never heard about before but which has changed their life. In those cases I normally just say that I am happy for them. However, the mistake that is often made is to assume that just because you have experienced miracles everyone else will too. Even with most conventional medicines which have a proven effect that is greater than placebo, it doesn't work for everyone. The point is that what works for you might not work for other people. Most alternative therapies have not been tested (or they have been tested with no effect). The responsible policy if you ask me is that doctors advocate therapies which have a proven effect, but do not prevent people from spending their money on other therapies (as long as they are not harmful)…
söndag 13 juli 2008
Plato and totalitarianism

Plato (see picture) was a philosopher born at the beginning of the Peloponnesian war which raged from about 430BC to 400BC. Plato is correctly given a lot of credit for being a very influential philosopher, indeed he thought and wrote about most areas of philosophy during his lifetime. For this he is very much admired, so much in fact that critical voices tend to drown in this ocean of admiration. However, since I started reading "History of Western Philosophy" by Bertrand Russell (one of my favorite philosophers by the way) I have gained a new perspective on Plato, one which I will share here.
In "The Republic" Plato writes about Utopia, that is, the ideal society. It is indeed a very charming and interesting book, much more engaging then many contemporary books that I have read. Socrates, the protagonist in The Republic is a man of great charisma and charm, and as a reader it is difficult not to be seduced.
Nevertheless, if you take away the the charm that is undeniably great in this book, what you are in essence left with is a state that would have made Josef Stalin and Hitler envious, had it ever been created. Society, we are told, is to be divided up into three different classes of citizens, guardians who are to rule, soldiers who will fight and workers who will (you guessed it), work. The guardians decide who, in the next generation, will become the guardian and who will be the worker/soldier. In other words, what Plato is advocating is that we decide at birth whether a child will be ruling over others, fight for the state, or carry out all the dirty work. We have A, B, and C citizens i.e. what we have is fascism, in its most pure form.
A short defense of Plato may be in order here. I do not think that he was being selfish when he advocated this fascistic society, it was not to make life comfortable for himself and other philosophers. Rather, his argument is that rulers should be chosen according to how good they are at ruling, not according to how many people like that ruler. Just like you want a shoemaker to make your shoes, or a soldier to fight your wars you would like a ruler who is educated in his/her profession. The problem with this, as Bertrand Russell points out, is that it is all but impossible to decide who is a good ruler, and if we get a bad ruler who we then cannot get rid of (in a democracy you would typically replace a bad ruler), then the consequences can be very serious indeed. I believe that there is no education that you can give a person that will ensure that he or she will be a good leader, therefore democracy is to be preferred.

Plato was also a fan of positive eugenics in which you arrange the society so that men judged as having desirable traits get more children as well as negative eugenics in which you prevent "inferior" people from getting children. We are told that when a child is born it is to be taken away from its mother so that she will never know which child is hers. If the child is judged by the doctors to be deformed or if it simply has inferior parents, it will be put away in a mysterious place "as it ought to be". Is it just me who thinks this sounds uncomfortably similar to Nazi Germany? Like I said, Hitler and Plato would have had a lot of ideals in common.
Strict censorship of information is another policy dear to Plato. We are told that any book that portrays Gods doing something un-virtuous are to be forbidden because Gods only do acts that are good (yeah right). This of course meant banning all works of Homer where you finds Gods that are jealous, envious, evil, cheating, you name it. As if that was not enough, Plato also want censorship of every book in which people are fearful or afraid to die. The reason is that the soldiers could be affected in a negative way if they read about the horrors of war.
To sum up, if Plato had been given free hands he would have created a fascist eugenic society society with very strict censorship. Hardly utopia for a modern person (I hope). Such a society, like the Christian-based societies that existed in the dark middle ages would also have a detrimental effect on creative thought and on science. All such a society can hope to achieve is success against other societies of roughly equal size (as long as that society does not start to encourage progress). Bertrand Russell suggests that Plato may have been influenced by the fact that he grew up during war-time. There is a clear tendency among people who live in turbulent times to desire stability, and as just mentioned, that is what Plato's Republic may potentially achieve.
torsdag 28 februari 2008
Dihydrogen monoxide...

- Is a highly reactive chemical
- Is one of the main waste products from nuclear power plants
- Is used in the production of pesticides and is an ingredient in spray oven cleaners (!)
- Has been used by ALL students responsible for school shootings in the United States in the past
- Is used by athletes to improve performace
- Contributes to the greenhouse effect
- Have been found in large amounts, in children who live near factories
Trust me, the list goes on and on. If you don't trust me, listen to this girl at you tube, or visit DMHO facts, or "Ban dihydrogenmonoxide".
Fooled? I hope not, though if you were you are certainly not alone. The common name for dihydrogen monoxide, or DMHO, is water (di=two, mono=one, two hydrogen and one oxygen makes H2O=water). This hoax which I rate almost as highly as the Sokal hoax which I have written about here, was popularized by a 14 year old american high school student as a part of a science project. He came up with this alternative name for water and listed statements such as the ones above, all of which are of course true. He then went around and asked fellow student to sign a petition to ban DMHO, 43 out of 50 signed it.
According to wikipedia more influential people have also been fooled. In 2001 A staffer at the New Zealand green party was asked to support the campaign to ban dihydrogen monoxide, in response she wrote that she was "absolutely supportive of the campaign to ban this toxic substance". In New Zealand 2007 (are they lacking scepticism in New Zealand?) Jacqui Dean a member of parliment wrote to the health minister asking whether there were any plans to ban DMHO.
I think that this hoax illustrates that scepticism is more often than not a virtue. This hoax was very transparent compared to many of the stories that are circulating in the world which are also not true, and yet, people fell for it.
måndag 31 december 2007
Superstition in Hollywood

Last night I went to see the new animated "Bee movie". It was a cute entertaining movie and I would recommend it to anyone, however, one thing in the movie bugged me =). In the very beginning of the movie there was a black screen and on it they wrote the infamous myth that "According to all known laws of aviation the bee should not be able to fly, but unaware of this fact, the bee continues to fly anyway.
This is of course nonsense, and it annoys me a little bit that they could not do a Google search to find out whether their claim is true or false… So Seinfeld, if you read this, Bees have been studied intensively, and according to the laws of aerodynamics they can fly. The citation above is based on the assumption that insects fly like airplanes and thus need same wing-area, an assumption which is simply not true. Bees and insects in general are small compared to airplanes and they accomplish their lifting force in qualitatively different ways. We do not know the details of how all insects fly, however, bees have in fact been studied rather intensively, and they can fly. If you are still in doubt take a look at any one of these links:
Caltech – Transcript of the original research
Wikipedia – Go to "bee flight"
Ask Dr. Galapagos – Detailed analysis of this question
Skepticality discussion board – Discussion on all explicit and implicit claims in Bee Movie
Seinfeld and his friends are hardly the sole perpetrators when it comes to spreading superstitions. I have always been a fan of the series X-files. In the X-files (which I have heard is based on real cases) you have two FBI agents, Mulder and Scully. In a typical episode Mulder and Scully gets a case with weird circumstances and they go to investigate. Mulder always come up with a supernatural explanation, often involving grey aliens with pear-shaped heads, whereas Scully always comes up with a scientific explanation involving hallucinations and rare scientific phenomenon. Sounds like a perfect setting right?

The only problem is that in every episode Scully's scientific explanation is always ridiculed. In the series you often see the supernatural events actually occurring, sometimes they happen right in front of Scully, and yet she sticks with her scientific dogmatism – looking really dumb in the process.
My worry here is simply that a lot of people will walk away from their screens believing that scientists are extremely narrow minded people, even though they are not. I would bet that no scientist would ever claim that bees cannot fly – we see that they do. Just because there currently is no satisfactory theoretical explanation for a certain phenomenon does not mean that one has to deny its existence, and I don't know any scientist who would think like that. As a student of the brain I constantly come across examples where a phenomenon has been detected "e.g. consciousness", and yet there is no good theoretical account of how that phenomenon is caused. Much of science is devoted to finding such explanations – how are bees able to fly even though they have so small wings?, how does this thing that we call consciousness come about in the brain? Scientists do not deny inexplicable phenomenon, they study them and try to come up with an answer, a noble endeavor indeed.
Ps: My productivity has been a little poor lately. The reason is simply that I have been extremely busy. My blog is not about to die…
lördag 1 december 2007
My review of Richard Dawkins "The God Delusion"
Here follows links to my reviews on all the different chapters...
Chapter 1 - A deeply religious non-believer
Chapter 2 - The God hypothesis
Chapter 3 - Arguments for God's existence
Chapter 4 - Why there is almost certainly no God
Chapter 5 - The roots of religion
Chapter 6 - The roots of morality
Chapter 7 - The good book and the changing moral zeitgeist
Chapter 8 - What's wrong with religion? Why be so hostile
Chapter 9 - Childhood, abuse, and escape from religion
Chapter 10 - A much needed gap?
Happy reading!
måndag 26 november 2007
The God Delusion, Chapter 10 – A much needed gap?

Is a belief in God beneficial? Do we need God in our lives? Richard Dawkins discusses this issue in chapter 10 of the God Delusion. The first point he makes is that, whether or not a belief in God is beneficial in terms of psychological health or whatever, says nothing about the existence of God. There are studies indicating that religious people, on average are happier and healthier than atheists. The difference was not big but it was significant. However, it would be very erroneous to conclude that just because religion is correlated with happiness, God must exist… Dawkins writes:
"Religion's power to console doesn't make it true. Even if we make a huge concession; even if it were conclusively demonstrated that belief in God's existence is completely essential to human psychological and emotional well-being; even if all atheists were despairing neurotics driven to suicide by relentless cosmic angst - none of this would contribute the tiniest jot or tittle of evidence that religious belief is true. It might be evidence in favour of the desirability of convincing yourself that God exists, even if he doesn't."
Personally I do think that the world would be a better place if people would have an evidence based world view. Politicians today often get stuck when religious arguments are brought to the table. Should Jerusalem be in the possession of the Israeli, or the Palestinian's? How do you argue with Bush when he claims that the Iraq invasion was a mission given to him by God? There is just not so much you can say in response to such an argument. To be fair, this was not his primary argument for going to war, but my point stands nevertheless.
I do not believe in God, yet I consider myself happy and I enjoy my life. When I face misfortunes I do not pray to God to help me, rather I try to come up with a concrete and effective solution to whatever it is I am facing. I realize of course that I have been born in a wealthy part of the world and that my miseries are nothing compared to the miseries that the average human being must face, yet even for them I think that it would be better not to rely on God to console and fix things. An additional bonus that you get as an atheist, at least to the extent that atheists do not believe in reincarnation, is that you value your time here on earth more. I do not believe that I will be reborn when I die, therefore I want to make the best of the time that I have here on this planet. For this reason I am also unlikely to end up as a suicide bomber. Only a very religious person would sacrifice something as valuable as his or her own life in order to kill other innocent people.
In short, there are plenty of reasons to be grateful for our time here on earth. One does not need God to have some substance in life. My life is filled with substance, and I think that for most people, even for religious people, the principal sources of happiness lie outside of the realm of religion. I end with these words from the God Delusion which illustrates my point well.

"But could it be that God clutters up a gap that we'd be better off filling with something else? Science, perhaps? Art? Human friendship? Humanism? Love of this life in the real world, giving no credence to other lives beyond the grave? A love of nature, or what the great entomologist E. O. Wilson has called Biophilia"