Feb 13 2010

Brain-Sharing, Illustrated

I found this awesome little video exploring the idea of plugging in someone else’s brain for a while to see how they see the world.

I sort of feel like this is what I’m doing when I hang out with certain people, or when I read certain authors or watch certain films. It’s always exhilarating to step inside someone else’s exquisitely constructed universe. Communication excites me.

This is from TV Ontario’s YouTube channel — that would be in Canada, folks, and the purveyor of my childhood television. My mom used to direct shows for them. Glad to see they’re still doing the occasional interesting thing.

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Aug 18 2009

We Were Wrong About Giraffes

I was told in grade school that the giraffe’s neck evolved to be long because taller giraffes could reach more tasty tree leaves in times of drought. It’s a lovely example of natural selection, and also completely wrong, as I discovered when researching an edit to the Wikipedia article. Eventually, someone just went and checked: it turns out that during times of drought or food scarcity, giraffes eat from low bushes.

There is an important lesson here about what it means to “explain something.”

giraffe-1

Rudyard Kipling wrote a children’s book of myths about the origins of animals titled Just-So Stories. In it he explains the origin of the elephant’s trunk, how the camel got his hump, and where the  leopard’s spots came from (they were drawn by an Ethiopian from the leftover black of his own dark skin, so that the leopard would better blend into the background when they hunted zebra together.) Clearly, making sense is not the criterion for truth. It’s very easy to forget this, when someone gives you a complex explanation and you get that “aha! I understand” feeling.  Human beings constantly confuse congruence with truth.

Sensible and false explanations are such a problem in science that the term “just-so story” has come to refer to any sort of explanation that fits the facts, but cannot be verified. Scientific theories are supposed to differ from literary criticism and other forms of creative writing by demanding explanations that are true. This means testing them against reality.

A crucial point here:  you can’t test a theory against the same facts that you used to come up with the theory to begin with. Of course a theory is going to fit the facts that inspired it! Instead, a theory — an explanation of something — needs to predict things that haven’t been observed yet. Prediction is the essence of science; it is the ability to say what will happen before it happens that makes it possible to “design” a bicycle rather than just gluing random objects together until they roll. If our aim is to come up with a true theory about evolution, we need to use the length of  the giraffe’s neck to make predictions about something else, something we can go check (repeatedly, if we are serious about testing the theory.)

This seemingly philosophical notion is incredibly useful for spotting subtle bullshit that sounds like science.

Consider, for example, the trial of a vitamin for preventing the common cold. Let’s say it’s even a controlled trial. One hundred volunteers are given Vitamin Z daily, while another hundred are (unknowingly) given a placebo. At the end of the study, the Vitamin Z group had the same number of colds. But, the researchers discover as they analyze the data, they had fewer headaches. Does this mean Vitamin Z prevents headaches? Not necessarily, because the theory “Vitamin Z prevents headaches” was formulated  by noticing a pattern, any pattern, then making up a story about how that pattern came to be. That doesn’t make the story true. And there will always be patterns. If the volunteers can suffer from hundreds of different ailments, then by sheer dumb chance the Vitamin Z group will be found to suffer from less of at least one of them. (Applied to controlled experiments, this notion can be made mathematically precise, by the way. See post-hoc analysis.)

Put another way, if you keep turning over rocks you will eventually find something. The whole point of a theory — an explanation, a model, a statement of the causal relationships of reality — is to say what you will find before the rock is turned over. Otherwise you only have a story that fits the facts, a just-so story.

I have found just-so stories to be most common in alternative medicine, economics, and evolutionary explanations of human behavior. If nothing testable has been predicted, then nothing has been “explained.”

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May 03 2009

We Have No Maps of The Web

 

web-from-space

We dream the internet to be a great public meeting place where all the world’s cultures interact and learn from one another, but it is far less than that. We are separated from ourselves by language, culture and the normal tendency to seek out only what we already know. In reality the net is cliquish and insular. We each live in our own little corner, only dimly aware of the world of information just outside. In this the internet is no different from normal human life, where most people still die within a few kilometers of their birthplace. Nonetheless, we all know that there is something else out there: we have maps of the world. We do not have maps of the web.

I have met people who have never seen a world map. I once had a conversation with herders in the south Sahara who asked me if Canada was in Europe. As we talked I realized that the patriarch of the settlement couldn’t name more than half a dozen countries, and had no idea how long it might take to get to any of the ones he did know. He simply had no notion of how big the planet was. And to him, the world really is small: he lives in the desert, occasionally catches a ride to town for supplies, and will never leave the country in which he was born. 

Online, we are all that man. Even the most global and sophisticated among us does not know the true scope of our informational world. Statistics on the “size” of the web are surprisingly hard to come by and even harder to grasp; learning that there are a trillion unique URLs is like being told that the land area of the Earth is 148 million square kilometers. We really have no idea what we’re missing, no visceral experience that teaches our ignorance.

We can remedy this.

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Mar 25 2009

We Can’t Learn About Economics

fundamentals_economics

Despite spending the last several days reading up on Treasury Secretary Geithner’s plan to buy bad bank assests, I now feel only marginally better prepared to judge whether this is a good idea or not. Of course, no one is asking me, but I still think it’s a big problem that I can’t evaluate this plan, because the fact that we live in a democracy means that citizens need to be able to understand what their government is doing. 

Now, I am no economist and I have no idea how to run a bank — much less all the banks. However, I am smart, interested, and I’ve done my homework, including previously reading a first year economics textbook (covering both micro- and macro-economics) and several other interesting books (1,2,3) on how markets work or don’t. In short I have been the model of a concerned citizen, and I still have no idea what is going on. This is partially because the situation is very complex, but it is also because there is no way a private citizen can get access to the data that would clarify matters — large banks will barely share their balance sheets with the government, much less me.

This is a problem. It means that the government, financial, and academic communities have not paid nearly enough attention both to basic economics education, and to transparency in real-world business. It is therefore impossible for anyone else to check their assumptions and restrain their huge power. Lest this sounds like unhelpful complaining, I promise to make a concrete suggestion for improvement by the end of this post.

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Jan 01 2009

The Censored Story of Wikileaks

Wikileaks founders presenting at the 25th CCC

Wikileaks is often in the news, but for the wrong reasons. The web site provides a highly public outlet for “classified, censored, or otherwise restricted material of political, diplomatic, or ethical significance.” It is designed to be a journalistic tool for whistle-blowers and citizens of oppressive government and corporate regimes, a place of first and last resort for sensitive information from sources who need protection. It is a great irony, then, that an organization which specializes in censored information only makes the news when somebody violently objects.

I first stumbled upon Wikileaks about a year ago and have been watching it closely ever since. Despite its mission of openness, the site has a certain mystery about it: nowhere on the site are the principals publicly named. I was delighted, then, to attend a talk by two of the Wikileaks founders at the 25th Annual Chaos Communication Congress in Berlin. The 50-minute presentation was titled Wikileaks vs. The World, or “a talk about some conclusions observing Wikileaks.”

You may have heard about some of the things we’ve done in the media, but what you hear about tends to be what is frequently of greatest salacious interest to the Western media and to people in general. That doesn’t tend to be our everyday work.

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Dec 22 2008

What do you Edit on Wikipedia?

When you edit Wikipedia, what do you write about? Did you sit in the front row or the back row as a child? Did you grow up on science fiction, were you an activist in college? Did no one understand you, or have you always been perfectly normal? Tell me, because I want to know who’s in this conversation.

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Dec 12 2008

How the Internet Can Fail

When television is good, nothing — not the theater, not the magazines or newspapers — nothing is better.

But when television is bad, nothing is worse. I invite you to sit down in front of your television set when your station goes on the air and stay there, for a day, without a book, without a magazine, without a newspaper, without a profit and loss sheet or a rating book to distract you. Keep your eyes glued to that set until the station signs off. I can assure you that what you will observe is a vast wasteland.

FCC Chairman Newton Minow gave this speech in 1961, decrying the state of the medium that many had hoped would bring new light to humanity. What is to say that the Internet will not sink into the same mediocrity?

There are differences, of course. The internet is (currently) very much an active, two-way medium; the internet is (currently) a very democratic place, where anyone can espouse their worldview to the whole world for only the effort of typing. And the internet is (currently) far too large and diverse to be effectively controlled by any particular corporate or goverment interest.

But I have a morbid interest in dystopia; and already I see signs that not everyone realizes what freedoms we could lose. Like bad science fiction, here are a few scenarios where the internet fails to live up to its almost obscene promise, where it becomes just another “vast wasteland.”

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Dec 12 2008

How To End Poverty

It just occurred to me that it’s worth Googling this phrase.

The fact that this five-second act has a reasonable chance of turning up a representation of the most carefully argued opinions of large cross section of (admittedly English-speaking) humanity, including quite possibly the opinions of the people who might actually understand the problem best — I find that quite a testament to the progress of, you know, civilization. And that capability is only about a decade old.

Who says that the olden days were better?

Next up, an article about how the internet might still drastically fail to achieve its potential.

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Dec 10 2008

Are They Right?

I’ve been reading StopTheACLU.com, because I want to get into their heads, because I want to avoid the classic mistake of intellectual isolation, and because I want to be challenged. Sure, they’re weirdos, but that doesn’t mean they don’t make sense. But there’s at least one thing in the StopTheACLU worldview that I find very hard to method-act: in their universe, global warming is a myth.

Okay, but how did I end up on this side and not that side?

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Nov 30 2008

Two Sages

The North Sage and the South Sage met at the crossroads. Or on, let’s say, a mountaintop. They began to discuss what they knew about the world, in the hopes of becoming wiser. Neither would call what they believed a religion.

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