by Dave Maier
A reader writes in to ask (“naïvely,” as he thinks):
In Kant's transcendental idealism, what is at stake? And, if we take it that it is a form of anti-realism and a source of later anti-realisms in philosophy, what is at stake in anti-realism? […] I see that one answer is that anti-realism lends itself readily to relativism, and if we want the comfort of believing that what we hold to be true or valuable is true or valuable “in fact”, then realism seems attractive and anti-realism problematic, whereas on the other hand we might think that we empowering our mental faculties in some important way if we adopt an idealist or anti-realist conclusion. [Also,] if truth has some kind of epistemic criteria and does not reduce to correspondence to a reality, but these criteria are objective in the sense that they enable us to establish that a claim is indeed true or correct, this might be thought to facilitate the meaningfulness of our moral and aesthetic claims against the possibilities of emotivism and expressivism. […] Maybe this move owes a debt to Kant, because Kant's idealism gives epistemic criteria for the truth even of empirical propositions while nonetheless maintaining an “empirical realism” according to which there are objective truths.
Dear reader:
That is one heck of a question, and not at all naïve. It would be a better and much different world if everyone were clear on realism, anti-realism, their relation to each other and to the other views which try to get beyond them, not to mention Kant. I am not a Kant scholar, but as a pragmatist I do have some things to say about realism et al, so let me give your question a necessarily compressed as well as highly contentious go.
As I see it, the best way to approach Kant is to see him as trying to get past a traditional impasse (not of course always seen as such by the tradition itself): that our intellect is such as constantly to pose questions about its relation to the world that it cannot answer. It's not that these questions are simply too hard – there's no philosophical problem with that, as we run into such problems all the time – but that they are incoherent. That is, in reflecting on itself as operating in the way that it in fact does, our intellect is inevitably drawn to certain conceptual train wrecks like a moth to a, um, train wreck. In Kant's own striking image, we're like the dove, who, tired of dealing with wind resistance, yearns for the ideal perfection of a vacuum – which would of course make flight impossible. (For more on the dove image, see here – a much better post than this one, if I do say so myself.) According to Kant and those of us following him this far, the trick is to get off the train at the right time – not following the moth into disaster, but also resisting nihilistic calls to abandon train travel entirely. As you can imagine, this can be a tricky business indeed.

The late economist Hyman Minsky wrote that after fortunes inflate on the back of a speculative bubble, and after investors’ irrational optimism and overvalued assets inevitably collapse, an economy enters a “period of revulsion,” when people remember that it’s risky to bet big on an uncertain future. Likewise, it’s always during the depths of a hangover that a drinker remembers how whiskey invites its own overconsumption and swears that the only way to avoid another descent into this purgatory is to never touch the stuff again. But after the fog leaves and with a clear head regained, he forgets the pain after the party and declares another Manhattan to be an eminently reasonable investment. Of course, the trick is to recall at just that moment how miserable you’ll be after another three. A pessimistic economist faces the same cyclical popularity as a tee-totaling friend; a consoling voice the morning after becomes a buzz killer as soon as night falls again.