Abstract

The idea that some things are fine in theory, but do not work in practice, was already an “old saying” when Kant wrote about it in 1793. Kant, who was annoyed that a man named Garve had criticized his ethical theory on this ground, responded by pointing out that there is always a gap between theory and practice. Theory provides general rules but it cannot tell us how to apply them--for that, practical judgment is needed. “[T]he general rule,” said Kant, “must be supplemented by an act of judgement whereby the practitioner distinguishes instances where the rule applies from those where it does not.” This means that those who lack judgment might be helpless, even though they know a lot of theory. “There are doctors and lawyers,” Kant explains, “who did well during their schooling but who do not know how to act when asked to give advice.” The point is especially important for the kind of absolutist ethic that Kant defends. Kant held that moral rules have no exceptions; on his way of thinking, we may never lie, we may never break a promise, and so on. This is a clear example of an ethic that seems not to work in practice, for sensible people recognize that in extreme circumstances even very serious rules may have to be broken. But the “gap” that Kant identifies has often been exploited to soften the impact of such harsh precepts. Traditional Christian ethics, for example, says (like Kant) that suicide is always wrong; but because judgment is required to determine which acts count as suicide, casuists have been able to excuse various sorts of self-destruction (and, not coincidentally, avoid consigning the deceased to hellfire) by classifying them as something else. Thus the hero who sacrifices herself to save others is not a suicide, nor is the man who kills himself while blind with grief, as he lacks the required rational intention. It might be thought that such gaps could be closed by adding further principles to the theory--for example, principles that specify more closely what counts as suicide....