A computable structure $\mathcal {A}$ is $\mathbf {x}$-computably categorical for some Turing degree $\mathbf {x}$ if for every computable structure $\mathcal {B}\cong\mathcal {A}$ there is an isomorphism $f:\mathcal {B}\to\mathcal {A}$ with $f\leq_{T}\mathbf {x}$. A degree $\mathbf {x}$ is a degree of categoricity if there is a computable structure $\mathcal {A}$ such that $\mathcal {A}$ is $\mathbf {x}$-computably categorical, and for all $\mathbf {y}$, if $\mathcal {A}$ is $\mathbf {y}$-computably categorical, then $\mathbf {x}\leq_{T}\mathbf {y}$. We construct a $\Sigma^{0}_{2}$ set whose degree (...) is not a degree of categoricity. We also demonstrate a large class of degrees that are not degrees of categoricity by showing that every degree of a set which is 2-generic relative to some perfect tree is not a degree of categoricity. Finally, we prove that every noncomputable hyperimmune-free degree is not a degree of categoricity. (shrink)

: Watsuji Tetsurō defined ethics as being generated by a double negation: the individual's negation of the community and the self-negation of the individual who returns to the community. Thus, ethics for him is based on the individual's sacrifice for the collectivity. This position results in the conception of the community as an absolute. I contend that there is a congruence between Watsuji's conception of ethics as self-sacrifice and the way he perceived the Japanese political system. To him, the imperial (...) system in Japan is based on the organic unity of the Japanese people, represented by the emperor, who embodies the general will of, and is therefore coterminous with, the Japanese nation. (shrink)

L’auteur examine la définition de la personne chez John Locke à laquelle se réfère un nombre croissant de philosophes en bioéthique. L’auteur se concentre sur une lecture précise et critique du célèbre passage lockéen qui opère un transfert de la définition de la personne d’un plan substantiel à celui juridique et moral . Il développe les contradictions logiques internes à la définition de la personne comme conscience de soi et conscience morale chez le philosophe anglais, notamment le besoin de réinsérer (...) la corporéité dans sa définition afin de transcender le subjectivisme, comme du critère de souvenir authentique qui le différencie du pseudo-souvenir, du statut de l’être humain qui serait ivre ou qui n’exercerait plus de manière irréversible la conscience de soi en lien avec la théorie des intérêts. L’auteur conclut par une réflexion critique sur les conséquences éthiques contemporaines de la définition lockéenne de la personne performante. (shrink)

The thesis of this paper is that the new natural law has reason to try to integrate Kant’s ethics, not reject it. My argument breaks into two parts. First I provide a critical account of the new natural law, taking as my exemplar of this theory Germain Grisez, Joseph Boyle, and John Finnis’s 1987 article “Practical Principles, Moral Truth, and Ultimate Ends.” My criticism in the end is that the new natural law is vulnerable to much the same criticism that (...) Boyle has made of Alan Donagan’s Kantian ethics. For the new natural law, the trouble will be specifying the basic goods. Here “compromise, intuition, or decision” appears inescapable. The second part of the paper briefly outlines what “Kant reconstructed” has to bring. The Kant that I advocate is not exactly Donagan’s; but my Kant shares with Donagan’s a patience for more than one reasonable position on disputed moral questions. (shrink)

Sociobiologists claim that there are important constraints on human behavior that are the result of genetic factors. Some of them also claim that this has important implications for ethics, and even more generally for determining how persons ought to behave. In this paper I shall defend these two claims, though I shall not be defending the views of any particular sociobiologist, unless one is prepared to count Hobbes as a sociobiologist.

L’A. se propose un nouvel examen de l’unité du Phèdre, problème qui mobilise les commentateurs depuis l’Antiquité et a été récemment relancé dans les études françaises et anglo-américaines. De fait, Platon n’a pas explicité la charnière articulant le diptyque formé par le discours sur l’amour comme éros spiritualisé suivi de la réflexion sur la rhétorique du vrai. Au-delà de l’étrangeté formelle, l’enjeu est philosophique : la dualité même du dialogue signale la tentative platonicienne de maintenir à tout prix le travail (...) de la psychagogie, fondement de la recherche amoureuse de la vérité, sur le terrain de la parole politique, jusqu’à se heurter à l’éclatement mutuel des deux ordres. Reste alors, devant nos yeux, l’unité fracturée du métaphysique et du politique. (shrink)