Friday, April 25, 2008

Neural Antecedents of Decision: Some Phenomenological Skepticism

Web-happy philo-types are by now familiar with the recent study on “Unconscious determinants of free decisions in the human brain” by Soon et al., published in Nature Neuroscience. The study, which expands on the famous experiments performed by Benjamin Libet, purportedly demonstrates a seven second gap between the onset of neural activity involved in making a choice and the subject’s awareness of the choice. The details are discussed, among other places, at Not Exactly Rocket Science, Mixing Memory, NeuroLogica, and Conscious Entities; some interesting comments also at Alexander Pruss's blog. Essentially, participants were asked to press one of two buttons, and to take note of the letter showing on a screen in front of them at the instant they first become aware of having made a decision (Libet’s original experiments asked subjects to remember the position of a hand on a clock); all the while, fMRI scans were recording their brain activity. The comparison, then, is between two heterogeneous sorts of things: neural events, and conscious awareness.

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Tuesday, April 22, 2008

Cheating, Belief in Determinism, and Rationality

A new study has just appeared, showing that students are more likely to cheat if they believe in determinism than if they believe in free will. You can read a good summary of the setup and results of the study here. These results are interesting on all sorts of levels, but of course they are generally likely to be taken as indicating a link between belief in free will and moral behavior. I want to question that link here. My question rests on the following worry: is cheating in this experiment actually immoral?

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Thursday, April 17, 2008

Dignity and Death in the Supreme Court

The Supreme Court issued its opinion on Baze v. Rees yesterday, marking an uneasy victory for supporters of one of those remaining cultural deficiencies that keeps the U.S. from proudly marching among the ranks of civilized nations, i.e., the death penalty. It is uneasy because the Justices could agree on fairly little, and their disagreement is likely—according to analysts—to lead to increased and welcome wrangling with the issue; but nevertheless a victory because, following the moratorium, our State slaughterhouses are once again free to open for business. The decision, which ruled that lethal injection does not violate the Eighth Amendment prohibition on “cruel and unusual punishment,” has been beautifully though too briefly analyzed by Jody Madeira at the Neuroethics and Law Blog. Madeira’s analysis brings to the foreground the Justices’ struggle with the central, though somewhat unlikely, role played in the deliberations by the concept of dignity. (Disclaimer: I know next to nothing about law.)

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Aristotle and Spinoza Were Primarily Analytic Philosophers. Haven't You Heard?

Alexander Pruss presents a fairly silly line of thought on his blog, in which he attempts to assimilate much of the history of philosophy under the analytic wing. To be fair, his goal is not to denigrate continental philosophy, and he does admit complete ignorance of it. Yet this does not prevent him from thinking that continental philosophers might also be able to trace themselves a philosophical history—he just thinks that history would be a bit different. But a bit of analytic re-colonization of history is clearly behind his thoughts, particularly when he says without basis that, “By and large, continental philosophy strikes me as a more recent development.” Oddly enough, continental philosophy also strikes me as a recent development. But then again, it is exactly as recent as analytic philosophy. An excellent response to Pruss is offered by Michael Pakaluk at Dissoi Blogoi. Readers of this blog, on the other hand, may be familiar with my response to such exercises in selective historical forgetting.

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Wednesday, April 16, 2008

Qualia, First-Person Experience, and the Missing Black Hole

Defenders of reductionism have a tendency to make the following argument, to which I referred in my last post: Science has made all sorts of progress that was previously thought impossible. We therefore have good historical grounds for thinking that, with further progress, science will eventually resolve the remaining problems. At the very least, we have solid grounds for being skeptical about any a priori arguments to the effect that there is some domain of human experience that remains inexplicable from the standpoint of the sciences. There are two candidates commonly presented for such irreducibility: the raw-feels, or qualia, in our experience, and normativity. (In a later post I will discuss a third candidate, introduced by hermeneutics, which is in principle clearly irreducible, i.e., the horizon within which any scientific enterprise takes place.) Both candidates are sometimes grouped under the heading of first-personal experience, which is taken to be in principle irreducible. I want to question this grouping.

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Tuesday, April 15, 2008

Joining the Herd by Bleating About Zombies

The philosophy blogosphere has been abuzz with zombie talk recently (Siris helpfully compiles some of the recent discussions here; and here are some I especially like), so I’ve finally decided to conform and throw a couple of thoughts out there, though I can’t promise they’ll be coherent. For those who don’t know, zombies are imaginary beings exactly like us in every physical respect, but lacking our phenomenal consciousness. And the zombie argument is supposed to go from the alleged conceivability of such beings to evidence that the phenomenal cannot be reduced to the physical. My own stance is roughly that zombie thought experiments are silly, as well as seriously problematic. They are problematic, on my view, not simply because (like too many thought experiments) they are set up to pump our intuitions about imaginary cases about which we don’t really have clear intuitions, but also because, by giving the illusion of clarity, they are designed to convince us that we really do have intuitions, reliable ones, about things we in principle cannot have reliable intuitions about. So here are a couple of thoughts.

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Saturday, April 5, 2008

Diderot, the Will, and the Self

For those who think that counterfactual arguments in discussions of free will are an invention of the twentieth century, here is a bit I just came across from Diderot’s D’Alembert's Dream:

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Who's Afraid of Idealism?

Today, it is usually enough to refute a theory just to demonstrate that it in any way implies idealism. There was a time, of course, when the reverse was the case, when it was enough to refute a theory just to show that it was close to empiricism, or possibly psychologism. Carnap seemed to regard pyschologism as just another of the basic informal fallacies, a sort of category mistake. One could go straight from, ‘This theory is psychologistic’ to ‘This theory is false’ without needing to go through the premise, ‘Psychologism is false,’ in the same way that one may go from ‘This theory begs the question’ to ‘This theory is false’ without needing to go through the premise ‘Begging the question is false.’

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Wednesday, April 2, 2008

Langton on von Herbert's Challenge to Kant (II)

Continuing from the previous post, I want to address three broad points on which I think Langton is at least partially misguided, or at least the situation is not as clear-cut as she makes it out to be. First, should we really think that Herbert’s letters represent a moral saint’s criticism of Kantian moral philosophy? Second, is there a feminist objection to that moral philosophy contained here, or only a criticism of the sexist prejudices of Kant’s time? Third, did Herbert really raise purely philosophical issues that Kant failed to address, or was she also raising psychological issues that Kant could not be expected, and was in no position to address?

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A Feminist Critique of Kant? Langton on Maria von Herbert (I)

A few years ago I glimpsed Rae Langton’s “Maria von Herbert’s Challenge to Kant” in some ethics reader, but did not have time to read it then. Today I encountered a link to an online version of the paper. Here I want to throw out some of my initial responses. Mainly: while I agree with much of what Langton says, I wonder if she is not conflating the critique of Kant the man, one who failed to recognize women as equal partners in dialogue, with a critique of Kant the philosopher who demanded the treatment of all persons as ends. Certainly there is a deep tension here, but I am not convinced it is a threat to Kantian moral philosophy, as opposed to a (justified) criticism of Kant’s application of that philosophy. Second, in building her critique, Langton more or less canonizes Herbert as a saint, based entirely on Herbert’s word. Third, Langton seems to want from Kant something he never claimed to offer nor should have been expected to, something akin to existential psychoanalysis.

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