Good Reason

It's okay to be wrong. It's not okay to stay wrong.

Category: science (page 4 of 8)

The Medium Challenge

Many thanks to everyone who has responded to the news of my mother’s death. I’ve appreciated everyone’s comments, and I was especially intrigued by this one from a long-time commenter.

I would love you to meet my good friend, I’ve spoken of her before, the clairvoyant one.

I would like you to test her objectively, with your atheistic views intact. Ask her to get in touch with your mother.

I should add (for the religious minded amongst your readers) she is a pure Catholic – purest of pure hearts. And I should also add I am almost an expert on the biblical views on visionaries, prophets, and the like. So no-one can argue badly against her without my intervention!

She is likely to get some wisdom and advice from your mother – you can test it for yourself.

I’m challenging you to a duel of sorts, on belief.

Now, I don’t think spirits exist, since no one’s yet presented evidence for them. And the idea of having a medium contact dead relatives is silly. If my Mom’s going to go to the trouble of crossing boundaries of time, space, and matter to give me a message, then I think she’d come to me, and not someone who has to fish around for information, saying “I’m getting the colour red; what does that mean to you?”

I don’t like what psychics and mediums do. I think they’re either fooling themselves into thinking they can communicate with spirits, or they’re vultures, preying on the grief and desperation of the bereaved. Their techniques are well-known — cold reading is something that you can learn to do. You throw out a lot of suggestions, wait for the subject to feed you information, take credit for the hits, and hope they forget all the misses.

In short, I’m with this guy.

It’s the whole problem of rigour. Going to a medium wouldn’t be a good test for me, since I’m as capable of fooling myself as anyone else. (And maudlin emotionalism, too. After Dad died, I cried watching Blades of Glory, for Pete’s sake. On a plane! It doesn’t take much when you’re in a state.)

With all that in mind, I think the Medium Challenge is a great idea. Even though I don’t believe in spirits and psychic phenomena, I could be wrong, and if we don’t do the experiment, we won’t learn anything new. So I’d like to run the experiment. But it’s going to be a controlled experiment. I want to get not one, but three clairvoyants, psychics, mediums, what have you. As a control, I’ll also need three non-mediums — people who don’t believe in psychic power or readings — doing their best at their own readings.

To make sure I’m not feeding the mediums information, some tight controls will have to be in place. I will be obscured from view by a screen, so the readers won’t be able to read my actions. (It should be all the same to the spirits.) I will only respond to direct questions, and I will only say “yes” and “no”. Other than that, I’ll be very helpful, truthful, and accommodating. The test will be whether the mediums are able to get hits with any greater frequency than the non-mediums, or random chance.

I’d like to video this and turn it into a programme — YouTube at the least, possibly more. Full recordings of all the sessions will be made available via the Internet. And — this is important to me — I’ll be publishing the results no matter what they are, even if they run counter to my current belief. (Or those of the psychics.)

The test needs to be blind, so I won’t know who the mediums or non-mediums are. For this reason, Maureen has kindly agreed to assist in lining up the readings for various nights in November or thereabouts. So if you would like to volunteer as a medium or a non-medium (you-know-who, your friend has priority), please contact her at mediumchallenge@gmail.com.

I still need to work out the particulars of the experiment, so watch this space for the full list of rules and conditions here in comments.

Stephen Hawking on the afterlife

“I regard the afterlife as a fairy story for people that are afraid of the dark.”

I used to be afraid of the dark, too. Then I grew up. Now, having grown up, I don’t find this fear admirable in others, or worthy of respect.

Newton’s flaming laser sword

Plato’s been causing trouble.

It’s that old Platonic ideal. Imagine an elephant. Not just some elephant you know (if you do know any), but the ideal prototypical elephant. Big, sort of gray, ears, legs, tail, trunk. An idea from which all other elephants deviate. That’s your Platonic elephant. Pure elephanticity.

The Platonic elephant doesn’t exist, except as an idealised abstraction in our minds. But this notion of ideal forms, of Platonism, is so pervasive that we sometimes don’t even see it. Which is why, as I say, it causes trouble.

People who aren’t good at understanding evolution are fond of repeating that there are no transitional forms. But in fact every species represents a transitional form. What we consider the species ‘elephant’ is nothing more than the set of all elephants that exist, which is different today than it was 200 years ago, which was different from 10,000 years ago. Real elephanticity keeps moving. When people think of the Platonic elephant as an immutable concept, they get tripped up.

Christian Platonism’s been dicking with my head for a long time, too. That involves the belief that a perfect version of you existed before this life (if you’re Mormon), or that your essential nature is spirit perfection, if you can keep it unspotted by the flesh. That Paul was horrified by flesh is one of the saddest contributions to Western thought, and goes a long way to explaining how fucked up Christianity is.

Avid comment readers will remember a recent Anonymous commenter (no, not Dieter Pingle) who made it clear that he (or perhaps she) wasn’t going to accept any evidence as good enough, that all evidence was equally valid (or invalid), and that the only way to go was pure reason.

Anon groused:

You put your faith in a system that “works well enough.” Mormons and other religious people do the same. You can’t come up with any real evidence to support your view and you feel that they can’t either.

Let’s ignore the fact that, since Anon didn’t accept that some evidence was better than others, I had already given her (or him) the best evidence anyone could ever provide.

What I realised from this exchange was that I had been accepting empirical evidence because it worked “well enough”, while acknowledging that it was somehow inferior to, and would take second place to, ‘pure reason’. And I had accepted this for as long as I could remember.

I have now come into contact with an article called “Newton’s Flaming Laser Sword” (PDF) by Mike Alder of our own august UWA. It’s the kind of thing everyone else probably knows already, but which I’m only now becoming aware of. (Ain’t larnin’ grand.) His argument is that ‘pure reason’ of the Platonic kind isn’t actually good for anything really, and that empiricism, such as it is, is the real driving force for knowledge.

The scientist’s perception of philosophy is that all too much of it is a variation on the above theme, that a philosophical analysis is a sterile word game played in a state of mental muddle. When you ask of a scientist if we have free will, or only think we have, he would ask in turn: ‘What measurements or observations would, in your view, settle the matter?’ If your reply is ‘Thinking deeply about it’, he will smile pityingly and pass you by. He would be unwilling to join you in playing what he sees as a rather silly game.

So far I have presented the orthodox position of scientists: truth about how the universe works cannot generally be arrived at by pure reason. The only thing reason can do is to allow us to deduce some truth from other truths. And since we haven’t got many truths to start out from, only provisional hypotheses and a necessarily finite set of observations, we cannot arrive at secure beliefs by thought alone. Most scientists are essentially Popperian positivists, they take the view that their professional life consists of finite observations, universal general hypotheses from which deductions can be made, and that it is essential to test the deductions by further observations because even though the deductions are performed by strict logic (well, mathematics usually), there is no guarantee of their correctness. The idea that one can arrive at reliable truths by pure reason is simply obsolete. Plato believed it, but Plato was wrong.

His point is that if a question can’t be settled experimentally, it’s not worth arguing about. Unless you like that sort of thing. I suppose I do like that sort of thing, so I’ll be considering that in due time. For now, I’m still getting my head around the idea of unseating Platonic ‘pure reason’ from the high seat it’s occupied for centuries, and putting empiricism in that place. I think I’ll be reading this article a few times… very slowly.

Revelation is not good evidence

I had an exchange with a Mormon friend a little while ago. His interesting but ultimately vacuous argument went something like this:

“You say you rely on evidence for the things you believe. But you’re only relying on physical, tangible evidence. You’re not relying on spiritual evidence, and so you’re only getting part of the picture. I’m using the full range of evidence available to us.”

My response is two-fold:

1) There is no empirical evidence for the claims of religion, including the existence of a god, the reality of an afterlife, or various details such as a Tower of Babel, gold plates, or Lamanites. The key doctrines of religious belief systems are either unsupported by evidence, or refuted by evidence. (Occasionally a religion will teach a principle that turns out to be valid — the Mormon prohibition on smoking seems worthwhile on its face — but these are things that could have occured to someone without requiring revelation.)

2) What my friend was calling ‘spiritual evidence’ is actually not good evidence at all. I think he was referring to something Mormons call ‘personal revelation’ — messages that people think they’re getting through prayer.

This is not a good way of finding out what’s true. How you feel about a proposition has nothing to do with whether it’s true or not. You can feel great about things that are completely false. Yet this method is at the very heart of the Mormon conversion experience — and other forms of Christianity also place an emphasis on emotional reasoning.

Let’s take a step back and see how this plays out in LDS missionary work.

LDS missionaries encourage investigators to ‘experiment upon the word‘. And the experiment that they propose is that you can pray and receive answers about the truth of their message telepathically from a god.

They rely on a scripture from the Book of Mormon, Moroni 10:4, which says to ask God, and the Holy Ghost will tell you if it’s true. By doing this, the missionaries commit the fallacy of begging the question — they claim that a god will tell you that the religion is true, but the existence of said god is the very premise under consideration.

And how does the Holy Spirit let you know?

But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith,

Meekness, temperance: against such there is no law.

That’s a pretty big list of fruits. Almost any feeling could qualify as a confirmation, especially if that’s the conclusion you want to come to, and you wouldn’t be asking if you didn’t have at least a glimmer of hope that it was true.

It should be obvious that this is not a real scientific experiment, and not just because it falls back on supernatural explanations.

  • Scientific experiments use evidence that is empirical — involving sense data that could be observed by anyone
  • Experiments try and control for bias
  • Experiments are replicable — anyone can repeat the experiment, and they should get about the same result. Ideas are verified by multiple points of view.

But so-called personal revelation doesn’t follow these controls.

  • Your feelings can’t be directly observed by other people. That makes it impossible to evaluate someone else’s religious claims, and that means that religious people have to ‘agree to disagree’ when they get conflicting revelations.
  • There’s no way to tell whether the feeling you’re getting is a real live revelation from a god, something from your own mind, or (worse) a temptation from an evil spirit, if you go for that. Or Zeus, Krishna, or the Flying Spaghetti Monster. It’s easy to distinguish between two competing natural claims, but it’s impossible to distinguish between two competing supernatural claims.
  • A scientific experiment attempts to control for bias, but here, the missionaries are subtlely biasing their subjects by telling them what they should expect to feel. It’s sort of like when you’re playing records backwards for satanic messages — it’s hard to tell what the message is until someone gives you the words.
  • The goalposts for this test are defined very vaguely and can be shifted. A confirmation can be ginned up out of the most meager of subjective data — or no data at all. Many are the members who ask for a revelation, get none, and continue in the church anyway, figuring that if they have real faith, they don’t need a spiritual confirmation. It’s a hit if you have good feelings, and hit if you don’t.
  • In a real experiment, we would try to account for both positive and negative results. But here, no attempt is made to add negative results to the sample. People who report a positive result show up in church, but people who get no result don’t, and are effectively deleted from the sample. In fact, if someone doesn’t get a revelation, it’s assumed that they are to blame for not being ‘sincere’ or trying hard enough. They are encouraged to repeat the test until they get a result that the experimenter will like.
  • Worse still, once someone is convinced that they’ve received a message from a god, Latter-day Saints then make a series of logical leaps to show that the whole church is true, from the Book of Mormon to Joseph Smith to Thomas Monson and beyond. All from good feelings and not from anything solid.

Not everyone is convinced by this test, but the church doesn’t need everyone to buy it — just enough people to keep the system going. And I can tell you from personal experience that when you think you’ve been touched by the divine, it can be very difficult to balance that against real evidence. No good evidence is going to come out of this kind of test. This is not a valid experiment. It is a recipe for self-deception. It is just asking to be fooled.

Homeopathy cartoon

Beaker has alerted me to this Darryl Cunningham cartoon which is critical of homeopathy. (You may have seen his earlier cartoon about the MMR.)

He points out that homeopathy is ineffective, and dangerous when chosen in preference to real medicine, which (surprise!) is the preference that homeopaths will steer you toward. I like how he explains not only why homeopathy doesn’t work, but also why people feel like it does.

He’s also included a bit about Penelope Dingle. I hope this retelling of her story helps to prevent others from following her course of action.

I confess it still puzzles me why Peter Dingle seems to have no particular qualms about homeopathy. If I’d been through what he’s been through, I’d be trashing it even more than I currently do. But then I’m not overly invested in quackery, so that may be where we differ.

North Am dialects reprezzent!

Did you learn to speak English in North America? Your input is required for the North American English Dialect Survey.

It’s easy — you just use your computer’s microphone to record yourself saying various words. They also ask where you went to high school, and where you live now.

They’re going to love me. I still sound like a dang ‘Merkun, but living in Australia for so long has changed my accent in one respect: I have broken free of the cot/caught merger. I say ‘cot’ like I’m British, but my ‘caught’ sounds like Noo Yawk. It might puzzle them for a bit, but they’ll probably understand once they see my current postcode.

Mobile phones and cancer

A study shows that mobile phone towers do not cause cancer. Good to know.

British scientists who conducted the largest study yet into cell phone masts and childhood cancers say that living close to a mast does not increase the risk of a pregnant woman’s baby developing cancer.

In a study looking at almost 7,000 children and patterns of early childhood cancers across Britain, the researchers found that those who developed cancer before the age of five were no more likely to have been born close to a mast than their peers.

And in this article, Bernard Leikind explains why mobile phones themselves cannot cause cancer.

One watt (the amount of energy emitted from mobile phones) is much smaller than many other natural energy flows that no one suspects might cause cancer. In my Skeptic paper, I show that the average energy production in my body as I go about my life is about 100 Watts. I also show that while I jog on my local gym’s treadmill for half an hour, I produce 1100 or 1200 Watts. This energy, produced in my leg muscles, travels throughout my body including my brain, and I sweat a lot. My body’s temperature does not change much. No one believes that my frequent treadmill sessions cause cancer. If the cell phone’s less than 1 Watt causes cancers, then why doesn’t my exercise session’s more than 1000 Watts cause cancer?

Perhaps if people hear this enough times, they will start to believe it. We live in hope.

Apparently, it did.

Great moments in blokeness:

Aussie men shoot each other in buttocks ‘to see if it hurts’

Two Australian men needed surgery after shooting each other in the buttocks during a drinking session to see if it would hurt, police said on Wednesday.

The men, both aged 34, used an air rifle to fire at each other on Sunday. By Tuesday, both were in hospital to have pellets removed from their buttocks and legs.

Criticise them if you wish for mixing guns and alcohol, but you have to admire their commitment to empiricism.

And there’s something else we can learn from this. You notice how one guy shot his friend (doubtless hurting him), but then it was his turn to get shot? This just shows that an experiment isn’t really valid unless it’s replicable.

Michael R. Ash commits if-abuse

Religious apologists are fond of using the trappings of science. Maybe it’s because science poses the greatest challenge to their claims (so they’d better sound like they know about it), and maybe it’s because they’re trying to borrow science’s credibility.

But it’s not easy to see exactly how the efforts of apologists and true believers are different from real science. I think I’ve worked it out. And since it’s a shame to leave it buried in the comment section of the Undying Thread, I’m pulling it up here into the light.

Here’s how it works according to science. It takes evidence to establish a claim. The more extraordinary the claim, the more evidence it takes. Without that evidence, the claim is rejected. The starting point is an assumption that the claim is not true. Basic stuff.

For example, I do not believe that there was ever a significant population of Hebrew or (reformed) Egyptian speakers in North or South America during alleged Book of Mormon times because there’s no evidence for it. No fragments of Hebrew script, no Egyptian loan words in existing languages. But future discoveries could overturn my disbelief.

Apologists and true believers do it the opposite way. The religious belief is assumed to be true without adequate evidence. Religious claims are accepted as long as they’re not specifically refuted by enough evidence. And the more deeply held the claim, the more evidence it takes to disabuse them of it.

Of course, it’s impossible to amass enough evidence to convince a true believer. For one thing, you can’t prove a negative. For another, many of their claims are not even falsifiable. And evidence can be ambiguous, so it will never disconfirm their view 100 percent. Which means that you can bring alternate explanations and evidence that refutes their view all day long, and they’ll just cling to the sliver of probability that remains, saying “I could still be right.” That sliver of hope is all they need.

So this is the tack that Mormon apologists have to take. They must know that there’s no evidence to establish their view, but as long as they can muddy the waters enough to create a sliver of possibility — redefining words, finding loopholes, and creating fanciful hypothetical scenarios — the faithful are satisfied and don’t notice that there’s not enough evidence to establish their claims.

We, as scientists and critical thinkers, do ourselves a disservice when we play the game their way. Trying to argue them down to zero probability is impossible, but that’s not our job. The burden of evidence is on them to establish their claims.

With that very long intro, let’s take a look at Michael R. Ash’s latest. This one’s about the word ‘Lamanite’. He’s already admitted that you can’t find DNA from Lamanites in current Native American populations, but the lack of evidence isn’t going to stop him from believing in them. He argues that their DNA was ‘subsumed‘ into a larger population — a wildly improbable event.

Ash details the problem:

If we theorize that the Lehites in the Book of Mormon were a small incursion into a larger existing New World population, and that their DNA was swamped out by the dominant and competing haplogroups,

Remind me: why were we theorising that? Because it’s well-supported by evidence? No, because it allows the religious theory to maintain a sliver of probablity. Carry on.

…some members may wonder who — of the surviving modern populations — are the “Lamanites”? In the Doctrine and Covenants, for example, the early Saints are directed to go preach to the Lamanites. How could the Native Americans in Joseph’s world be Lamanites?

It’s worse than that. If you can’t find any genetic Lamanites, how is the Book of Mormon going to come forth unto them? How are they going to ‘blossom as the rose‘? The redemption story falls apart.

Ash’s answer: Redefine the word ‘Lamanite’ away from genetics and toward culture.

The answer is found in culture and genealogy.

While culture is learned and typically passes from parents to children, people can change cultures or assimilate into different cultures. Thus we have Americans who are culturally American, although they (or their ancestors) might have come from Africa, Europe, Asia, or many other parts of the world. Terms such as “African,” “Asian,” “Jew,” “LDS,” “Indian,” and so forth are social constructs, not biological or genetic classifications.

Shorter: Cultural terms are just constructs, so it’s okay to refer to people by a term that was completely made up by some guy.

Finally, we have genealogy, or one’s ancestry. Everyone has two parents, and each parent has two parents. If you go back two generations (to your grandparents) you have four ancestral slots filled by two grandfathers and two grandmothers. As we go further back in our genealogy the number of ancestral slots increases geometrically.

Fail. He means ‘exponentially‘.

Update: No, I fail. See comments.

These slots don’t represent the actual number of ancestors, however, because intermarriage among relatives will cause some ancestors to fill multiple ancestral slots.

No, silly, it’s because parents can have more than one child. So each person on earth doesn’t require two unique parents; lots of people will have the same parents. Minor point, but it is a worry that he’s not good at understanding things.

If we could create a genealogical chart for a modern Native American back to Lehi’s generation we would have over 1 octillion ancestral slots (that’s more than 1 trillion times 1 quadrillion). Now obviously he would not have 1 octillion ancestors (there haven’t been that many people in the entire history of the world). Some ancestors would fill many of these ancestral slots. Nevertheless, on a genealogy chart, there would be 1 octillion ancestral slots. From how many slots would our Native American be descended? All of them. If Laman (or a descendant of Laman) was an ancestor in just one of these 1 octillion ancestral slots, then it can legitimately be claimed that our Native American is a Lamanite descendant.

Wow, the descendants are all Lamanites even if there was just one real Lamanite in an octillion?

What if there was none? No Lamanite ancestors at all. Because that’s the way it’s looking.

We can discount Ash’s complex web of theorising at one stroke, because there’s literally no evidence for Lamanites. But he’s working the opposite way: if we assume that the Book of Mormon is true, and if this incredibly improbable genetic swamping happened, and if words mean what he redefines them to mean, and if there’s one Lamanite back in the genealogy, and if you put on these special 3D glasses and squint a bit, then it’s remotely possible that the Mormon view could still be right. And you can keep going to Church, pay tithing, and stop worrying.

I’ll ask it again: What’s more likely, that Ash’s very complex and improbable overlapping scenarios happened in such a way as to not leave any evidence? Or that someone wrote a fake book?

Ash is once again redefining words and constructing fanciful hypotheticals to create a semblance of plausibility for his religious theory. That’s not good enough. He needs to bring publicly verifiable evidence.

Atheist YouTube party

For this week’s UWA Atheist and Agnostic Society meeting, it was Atheist YouTube Party! With me as programmer. I really enjoyed the chance to share some of my faves. Here they are, as a YouTube playlist. Prepare to be offended and/or enlightened; the choice is, as always, entirely up to you.

NOTE: I think there might be a bug in the YouTube embedded playlist feature. The embedded playlist below skips the first video, which in this case was Tim Minchin’s “The Pope Song”. If you want to see it first, you can either click here to go to my blog post of a few days ago, or click here to find a working playlist on a different page.

Since I didn’t have a rock-solid net connection in the lecture room, I decided to take the precaution of downloading the videos as mp4’s using KeepVid, and then making a playlist in VLC. It made things go much more smoothly.

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