Showing posts with label science. Show all posts
Showing posts with label science. Show all posts

Saturday, June 28, 2008

Come on, Hank, don't you know we're past that science stuff?

Hank Williams writes one of the more interesting blogs I've seen, Why does everything suck? A lot of his posts are reasonably technical, so the average person stumbling across this blog might look at the first post or two on a given day, decide that Symbian or the Semantic Web are not topics of interest, and move along.

And that would be a shame, because in amongst the interesting technical posts are some very accessible ones, and they generally express my thoughts better than I can. I've linked to WDES a couple of times before, each time to highlight a post I thought was particularly spot on.

Hank, if I might call him that (hey, he can call me Andro), is especially persuasive when taking on the increasingly loopy ideas of Chris Anderson, editor-in-chief of Wired Magazine. Anderson is the fellow who's currently pushing the idea that we're moving to an economy in which everything of value will be free (I referred to Hank's previous post on this here). He's already gotten himself on Charlie Rose to discuss this, even though his book on the subject won't be out until next year, and there's bound to be a lot of buzz around this idea (Wired tends to create its own buzz, so prescient are they thought to be).

Anderson's newest "idea" is that the common axiom that "correlation is not causation" is no longer operable in the Google world. Hank:
And then Chris puts forward what I will call the Anderson Theory. It is based on the idea that with massive stores of data, most notably Google, we do not need such scientific methods any more. With such huge amounts of data we can establish much more detailed correlations, therefore making formal logic and scientific method irrelevant....So there you have it. Correlation is enough. Causation is irrelevant.
Anderson goes on to make the remarkable statement that, since models are imperfect, they can easily be replaced by the sheer weight of data that can now be linked and associated. His primary example is genome decoder Craig Venter's work in sequencing the air:
In the process, he discovered thousands of previously unknown species of bacteria and other life-forms.

If the words "discover a new species" call to mind Darwin and drawings of finches, you may be stuck in the old way of doing science. Venter can tell you almost nothing about the species he found. He doesn't know what they look like, how they live, or much of anything else about their morphology. He doesn't even have their entire genome. All he has is a statistical blip — a unique sequence that, being unlike any other sequence in the database, must represent a new species.

This sequence may correlate with other sequences that resemble those of species we do know more about. In that case, Venter can make some guesses about the animals — that they convert sunlight into energy in a particular way, or that they descended from a common ancestor. But besides that, he has no better model of this species than Google has of your MySpace page. It's just data. By analyzing it with Google-quality computing resources, though, Venter has advanced biology more than anyone else of his generation.

There is so much wrong with this that I don't even know where to begin. That Venter doesn't know anything about these new species other than they must exist means he hasn't "discovered" anything. Large numbers of the populace believe in fairies or angels based on the same kind of logic. Furthermore, finding vast numbers of correlations without any backing facts is not advancing biology.

I don't want to be too extreme here; I'm not going to argue that there is no value in these kinds of activities. Where it becomes dangerous, and Hank expresses this idea better than I, is the point at which we decide that we have a new scientific paradigm. Why finance traditional research when we can just crank up the supercomputer and "discover" whole new wondrous worlds?

Certainly this form of extreme data mining can provide new lines of inquiry. That Venter is detecting new things in the air may well provide food for rounds of future research, and there's value in that; but Anderson is contending that the science is done, that the vast amount of data sifting closes the process. He's wrong.

I think Anderson is guilty of extending the very popular concept of energence way too far. Emergence is the hot idea that complexity can arise from simplicity through wholly natural processes. It is, in brief, the extension of evolution to other situations, ignoring the incredible timeframe over which evolution has occurred. The most common idea in this space is that, using the Internet, computers will become "intelligent" through their number and interactivity. It has always seemed to me that, without pressure, evolutionary or otherwise, this intelligence is unlikely to emerge - computers do not need to become intelligent in order to survive, if they can even be said to have a survival instinct.

Anderson's premise comes from the same shelf. Truth will emerge from data with no causal component, no simplifying model to get in the way of new reality. (And his not-very-thinly veiled Google love comes out quite inappropriately for a journalist.) It may be true that models are only imperfect versions of reality, and that new techniques and technology may expand our reality, but I feel confident that both of those things can be fit into the framework of science, that science will become stronger as a result.

Tuesday, April 22, 2008

Review - The Science of Michael Crichton

I admit it, I enjoy books that have titles like, The Science of..., with the dots filled in with the name of an author or TV show. A book like this about the Star Trek series of TV shows and movies will discuss subjects like, "Can there be a transporter?" or "Could Vulcans and humans intermarry?"

Books of this type, especially those with several authors, generally discuss these topics in one of two ways: either the author does a detailed critique of the science in the story, or writes an overview of what is known with a brief nod to the source. While the former can have a certain snarky joy to it, I find the second kind more fulfilling, as an author with knowledge of the topic gives a current overview of it. Given the relatively low quality of science reporting in our major dailies and periodicals, this can be a good source (yes, I understand that having to use a TV show to get into the topic is somewhat sad, but these books, at their best, can give a 20 page summary of a scientific issue in fine form).

For the most part, The Science of Michael Crichton: An Unauthorized Exploration into the Real Science Behind the Fictional Worlds of Michael Crichton (TSMC), edited by Kevin R. Grazier, features essays of the latter type. The real scientists and science writers behind these articles generally use the Crichton subjects as springboards into describing state-of-the-art thinking.

My disclaimer: I loved Crichton's debut, The Andromeda Strain, a (for me) fascinating exploration of the implications of an alien life form and its effect on humans in a small town in Arizona. It had enough science to fascinate the young me, and I was willing to overlook the stereotypical characters and clunky writing. Unfortunately, I have found subsequent works in the Crichton oeuvre disappointing; as he has become more of a brand name, the flaws have taken on more importance. There are also other authors plumbing somewhat the same ground who write stories with more resonance, and manage to say something about human beings as well (see the best of Greg Bear, as one example).

TSMC contains essays that are all somewhat critical of the science used in the novels - some are more understanding of the needs of the fiction author than others. That scientists are of necessity the villains seems acceptable to some, other authors seem to have a problem with that. And that may get at the heart of my feeling (and the writer of the pertinent essay, Sergio Pistoi) that The Andromeda Strain is Crichton's best. It is the one that presents scientists in a generally positive light.

The brilliant Ray Kurzweil writes an essay that uses Crichton's The Terminal Man as a springboard to his controversial opinions about the eventual fusion of human and computer. You won't find out much about the book, but you will certainly have something to think about. Steven Gulie uses the same book (odd, because The Terminal Man was not one of Crichton's most prominent works) to write the most affecting essay, as he describes his own experience with brain implants to treat Parkinson's disease.

As we move on in time, it is clear that Crichton departs ever further from real science, as he misrepresents the fields of anthropology (in Eaters of the Dead), animal behavior (Congo), physics (Timeline), nanotechnology (Prey), climatology (State of Fear), and biotechnology (Next). What is most troubling is the increasing hostility of this Harvard Medical School graduate to science itself.

I can't personally speak to every essay's criticism, because I haven't read every one of the Crichton novels covered in this book. But, when such a best-selling and influential author decries global warming, and does so with apparently sketchy evidence (in one case, he draws exactly the wrong conclusion from a study), then he has gone from science fiction into political commentary of a most curious sort. It may be good to have a knowledgeable author writing cautionary tales about an over-reliance on unproven technology, but that gives that author a special responsibility to get the facts right. In particular, for someone who has written a book that uses chaos theory as a major plot point, then ignores the possible chaotic implications of global warning in another book, seems incongruous.

Anyway, TSMC is a good read, even if you are not familiar with every Crichton novel covered. You will get a gentle introduction to many current scientific issues, and that's positive.

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