Richard McCarty

: A standard interpretation of Kantian "maxims" sees them as expressing reasons for action, implying that we cannot act without a maxim. But recent challenges to this interpretation claim that Kant viewed acting on maxims as optional. Kant's understanding of maxims derives from Christian Wolff, who regarded maxims as major premises of the practical syllogism. This supports the standard interpretation. Yet Kant also viewed commitments to maxims as essential for virtue and character development, which supports challenges to the standard interpretation, and raises questions about the coherence of Kant's overall conception of the role of maxims in practical philosophy.

The categorical imperative can be construed as a universalization test for moral permissibility. False negatives of the categorical imperative would be maxims failing this test, despite the permissibility of their actions; maxims like: ‘I’ll withdraw all my savings on April 15th’. Examples of purported false negatives familiar from the literature can be grouped into three general categories, and dispatched by applying category-specific methods for proper formulation of their maxims, or for proper testing. Methods for reformulating failing maxims, such as the addition of appropriate conditional clauses, do not generate false-positive counterexamples in other instances.

ABSTRACT: Critics have charged that there are gaps in the logic of Kant’s derivation of the formula of universal law. Here I defend that derivation against these charges, partly by emphasizing a neglected teleological principle that Kant alluded to in his argument, and partly by clarifying what he meant by actions’ “conformity to universal law.” He meant that actions conform to universal law just when their maxims can belong to a unified system of principles. An analogy with objects’ conformity to universal law in nature helps show how Kant was correct in deriving the formula of universal law from the premises of his argument. RÉSUMÉ: Certains ont critiqué la dérivation de la formule de la loi universelle de Kant parce que la logique en serait lacunaire. Je prends la défense de la dérivation, en mettant d’abord l’accent sur un principe téléologique auquel Kant fait allusion dans son argument et, ensuite, en clarifiant ce que celui-ci entend par la «conformité à la loi universelle» des actions. Kant maintenait que les actions étaient conformes à une loi universelle seulement lorsque leurs maximes appartiennent à un système unifié de principes. Une analogie avec la conformité à la loi universelle des objets dans la nature aide à montrer pourquoi Kant avait raison de dériver la formule de la loi universelle des prémisses de son argument

On a standard interpretation, Hume argued that reason is not practical, because its operations are limited to “demonstration” and “probability.” But recent critics claim that by limiting reason’s operations to only these two, his argument begs the question. Despite this, a better argument for motivational skepticism can be found in Hume’s text, one that emphasizes reason’s inability to generate motive force against contrary desires or passions. Nothing can oppose an impulse but a contrary impulse, Hume believed, and reason cannot generate an impulse. This better argument is here developed and defended. Two lines of objection to it can be anticipated: that reason actually can generate impulsive force, based on contents of its normative judgments and that reason neither can nor needs to generate an impulse, since the actions of rational agents are not determined by forceful impulses of desire, as Hume supposed. These objections are answered by pointing out their unsatisfying consequences.

Few challenges facing Kantian ethics are more famous and formidable than the so-called "case of the inquiring murderer." It appears in some form today in most introductory ethics texts, but it is not a new objection. Even Kant himself was compelled to respond to it, though by most accounts his response was embarrassingly unpersuasive. A more satisfactory reply can be offered to this old objection, however. It will be shown here that Kantian ethics permits lying to inquirers asking wrong questions, and that, therefore, it can be right to lie to a murderer inquiring whether his intended victim is hiding in your house. We begin by reviewing a now popular and plausible-sounding defense of the right to lie. Finding it unsuccessful, we turn next to scrutinize the type of question asked. The case of the inquiring murderer cannot be presented without supposing that the murderer's inquiry is unevadable. As we shall then see, in Kantian ethics it is usually wrong to ask such questions.

In Religion within the Boundaries of Mere Reason Kant wrote that ‘freedom of the power of choice has the characteristic, entirely peculiar to it, that it cannot be determined to action through any incentive except insofar as the human being has incorporated it into his maxim.’ This is an obscure statement, in both meaning and provenance. Yet almost all recent interpreters of Kant's practical philosophy find it crucial for understanding his theories of freedom and motivation, since it seems to indicate what we are required to do in order to act by our own free choice. Here I refer to Kant's statement expressing the requirement that incentives be incorporated into maxims as his ‘incorporation requirement.’ How that requirement is best understood will be the leading question in what follows: a question I shall answer by showing why the incorporation requirement, and Kant's theories of freedom and motivation, should be understood differently from the way they are now usually understood.

Kantian political philosophy is a rich mine, and one which is hardly played out after two centuries. This substantial collection of essays validates both of those claims. Although Kant's moral philosophy has understandably received the lion's share of attention from contemporary philosophers, Beiner and Booth, both political scientists, have gathered essays which nicely illuminate the historical and political facets of Kantian practical philosophy. Anyone interested in Kantian ethics would benefit from a look at most of the essays included.