Saturday, November 05, 2005

Waking Life: free will

This afternoon I watched Richard Linklater (Slacker, Dazed and Confused, School of Rock)'s film Waking Life. It's about this guy who appears to be dreaming (the film's pretty surreal), and has philosphical discussions with various people.
The film is actually made up of animations, based on footage shot on digital camera. (The technique's called rotoscoping.)
One philosphical idea that is brought up is the idea of free will. This monologue sums up a lot of stuff I think needs to be considered when thinking about free will:

In a way, in our contemporary world view, it's easy to think that science has come to take the place of God. But some philosophical problems remain as troubling as ever. Take the problem of free will. This problem has been around for a long time, since before Aristotle in 350 B.C., St. Augustine, St. Thomas Aquinas, these guys all worried about how we can be free if God already knows in advance everything we're going to do. Nowadays, we know that the world operates according to some fundamental physical laws, and these laws govern the behavior of every object in the world. These laws, because they are so trustworthy, they enable incredible technological achievements. But look at yourself. We're just physical systems too, right? We're just complex arrangements of carbon molecules. We're mostly water. And our behavior isn't going to be an exception to these basic physical laws. So it starts to look like whether its God setting things up in advance, and knowing everything you're going to do, or whether it's these basic physical laws governing everything, there's not a lot of room left for freedom.

So you might try to just ignore the question, ignore the mystery of free will, and say, oh well, it's just an historical anecdote, it's sophomoric, it's a question with no answer, just forget about it. But the question keeps staring you in the face. Think about individuality for example. Who you are is mostly a matter of the free choices that you make. Or take responsibility. You can only be held responsible, you can only be found guilty, or you can only be admired and respected for things you did of your own free will. So the question keeps coming back. And we don't really have a solution to it. It starts to look like all our decisions are really just a charade.

Think about how it happens. There's some electrical activity in your brain, your neurons fire, they send a signal down into your nervous system, it passes along down into your muscle fibers, they twitch, you might reach out your arm. It looks like it's a free action on your part, but every part of that process is actually governed by physical laws, chemical laws, electrical laws, and so on.

So now it starts to look like the big bang set up the initial conditions, and the whole rest of human history, and even before, is really just the playing out of subatomic particles according to these basic fundamental physical laws. We think we're special. We think we have some kind of special dignity, but that now comes under threat. That's really challenged by this picture.

So you might be saying, well, wait a minute. What about quantum mechanics? I know enough contemporary physical theory to know it's not really like that. It's really a probabilistic theory. There's room. It's loose. It's not deterministic. And that's going to enable us to understand free will. But if you look at the detail, it's not really going to help because what happens is you have some very small quantum particles, and their behavior is apparently a bit random, they sort of swerve, their behavior is absurd in the sense that its unpredictable, and we can't understand it based on anything that came before. It just does something out of the blue according to a probabilistic framework. But is that going to help with freedom? I mean, should our freedom be just a matter of probabilities, just some random swerving in a chaotic system? That starts to seem like it's worse. I'd rather be a gear in a big deterministic physical machine than just some random swerving.

So we can't just ignore the problem. We have to find room in our contemporary world view for persons with all that that entails. Not just bodies, but persons. That means trying to solve the problem of freedom, finding room for choice and responsibility, and trying to understand individuality.
Any thoughts in response?

Waking Life index

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