The Greenberger-Horne-Zeilinger state is the most famous example of a state with multiparticle entanglement. In this article we describe a group theoretic framework we have been developing for understanding the entanglement in general states of two or more quantum particles. As far as entanglement is concerned, two states of n spin-1/2 particles are equivalent if they are on the same orbit of the group of local rotations (U(2)n). We consider both pure and mixed states and calculate the number of independent (...) parameters needed to describe such states up to this equivalence. We describe how the entanglement of states in a given equivalence class may be characterized by the stability group of the action of the group of local rotations on any of the states in the class. We also show how to calculate invariants under the group of local actions for both pure and mixed states. In the case of mixed states we are able to explicitly exhibit sets of invariants which allow one to determine whether two generic mixed states are equivalent up to local unitary transformations. (shrink)

The Greenberger-Horne-Zeilinger state is the most famous example of a state with multiparticle entanglement. In this article we describe a group theoretic framework we have been developing for understanding the entanglement in general states of two or more quantum particles. As far as entanglement is concerned, two states of n spin-1/2 particles are equivalent if they are on the same orbit of the group of local rotations (U(2)n). We consider both pure and mixed states and calculate the number of independent (...) parameters needed to describe such states up to this equivalence. We describe how the entanglement of states in a given equivalence class may be characterized by the stability group of the action of the group of local rotations on any of the states in the class. We also show how to calculate invariants under the group of local actions for both pure and mixed states. In the case of mixed states we are able to explicitly exhibit sets of invariants which allow one to determine whether two generic mixed states are equivalent up to local unitary transformations. (shrink)

En enero de 1974 Zubiri dio un breve curso en la Sociedad de Estudios y Publicaciones de Madrid sobre el tema Tres dimensiones del ser humano: individual, social e histórica. Meses después publicó la última de esas lecciones bajo el título de La dimensión histórica del ser humano. El presente volumen recoge el texto de las tres conferencias, más la versión escrita de la última de ellas. La tesis que Zubiri desarrolla en estas lecciones es que el ser humano es (...) a la vez y necesariamente individual, social e histórico, y que estas dimensiones vienen exigidas por su propia realidad específica, que es pluralizante, continuante y prospectiva. (shrink)

Para completar la exposición de su propio pensamiento Xavier Zubiri dictó en 1968 un ciclo de conferencias titulado Estructura dinámica de la realidad. El texto de esas conferencias es el que ahora, forma este libro. En él analiza el momento dinámico de la realidad, lo que denomina su «dar de sí». Si en Sobre la esencia la realidad era definida como «de suyo», ahora se completaba esa definición afirmando que es, además un «dar de sí». De suyo, la realidad (...) da de sí. Tal podría ser el resumen más apretado de esta obra, que añade precisiones muy importantes a los libros ya publicados en esta misma colección. (shrink)

The past decade has seen a burgeoning of scholarly interest in conscientious objection in healthcare. While the literature to date has focused primarily on individual healthcare practitioners who object to participation in morally controversial procedures, in this article we consider a different albeit related issue, namely, whether publicly funded healthcare institutions should be required to provide morally controversial services such as abortions, emergency contraception, voluntary sterilizations, and voluntary euthanasia. Substantive debates about institutional responsibility have remained largely at the level of (...) first-order ethical debate over medical practices which institutions have refused to offer; in this article, we argue that more fundamental questions about the metaphysics of institutions provide a neglected avenue for understanding the basis of institutional conscientious objection. To do so, we articulate a metaphysical model of institutional conscience, and consider three well-known arguments for undermining institutional conscientious objection in light of this model. We show how our metaphysical analysis of institutions creates difficulties for justifying sanctions on institutions that conscientiously object. Thus, we argue, questions about the metaphysics of institutions are deserving of serious attention from both critics and defenders of institutional conscientious objection. (shrink)

Insurance is pervasive in many social settings. As a cooperative device based on risk pooling, it serves to attenuate the adverse consequences of various risks by offering policyholders coverage against the losses implied by adverse events in exchange for the payment of premiums. In the insurance industry, the concept of actuarial fairness serves to establish what could be adequate, fair premiums. Accordingly, premiums paid by policyholders should match as closely as possible their risk exposure. Such premiums are the product of (...) the probabilities of losses and the expected losses. This article presents a discussion of the fairness of actuarial fairness through three steps: defining the concept based on its formulation within the insurance industry; determining in which sense it may be about fairness; and raising some objections to the actual fairness of actuarial fairness. The necessity of a normative evaluation of actuarial fairness is justified by the influence of the concept on the current reforms of public insurance systems and the fact that it highlights the question of the repartition of the gains and burdens of social cooperation. (shrink)

The past decade has seen a burgeoning of scholarly interest in conscientious objection in health care. Specifically, several commentators have discussed the implications that conscientious objection has for the delivery of timely, efficient, and nondiscriminatory medical care. In this paper, I discuss the main argument put forward by the most prominent critics of conscientious objection—what I call the Professional Duty Argument or PDA. According to proponents of PDA, doctors should place patients’ well-being and rights at the center of their professional (...) practice. Doctors should be prepared to set their personal moral or religious beliefs aside where these beliefs conflict with what is legal and considered good medical practice by relevant professional associations. Conscientious objection, on this account, should be heavily restricted, if even allowed at all. I discuss two powerful objections against PDA. The first objection, which I call the fallibility objection, notes that law and professional codes of conduct are fallible guides for ethical conduct and that conscientious objection has in the past and continues today to provide a check on aberrations in law and professional convention. The second, which I call the professional discretion objection, states that restrictions on conscientious objection undermine one of the cornerstones of good medical practice, namely, a practitioner’s right to independent professional judgment. I argue that these two objections give us reason to retain conscience clauses in professional codes of conduct. (shrink)

De façon très allusive dans quelques textes de Signes et dans une note de travail du Visible et l’invisible, Merleau-Ponty a indiqué qu’élucider la question d’une « chair du social » exigeait un approfondissement préalable des notions de Gestalt, d’institution et de symbolisme. L’objet de cet article est de montrer comment Simondon a repris la question au point où Merleau-Ponty l’a laissée, en décrivant l’activité ou l’invention technique comme l’inscription matérielle d’un collectif en genèse, non partagé par la dualité du (...) psychique et du social . La pensée technique, loin d’être anecdotique ou spécialisée, apparaît donc comme un moment essentiel dans l’élaboration d’une théorie générale du lien social et de la socialisation des individus. (shrink)

There has been significant debate about whether the moral norms of medical practice arise from some feature or set of features internal to the discipline of medicine. In this article, I analyze Edmund Pellegrino’s conception of the internal morality of medicine, and situate it in the context of Alasdair MacIntyre’s influential account of “practice.” Building upon MacIntyre, Pellegrino argued that medicine is a social practice with its own unique goals—namely, the medical, human, and spiritual good of the patient—and that the (...) moral norms that govern medical practice are derived from these goals. After providing an overview of Pellegrino’s work, I discuss some forceful objections to his theory—specifically, that it is too rigid and incapable of entering into dialogue with contemporary values systems; that it is dependent on an external conception of human flourishing; and that it is incompatible with the rapidly changing nature of modern medicine. In the final section of this article, I consider how theorists working in the Hippocratic tradition might respond to these objections against ethical essentialism by drawing upon MacIntyre’s historico-cultural method as well as what he calls Aristotle’s “metaphysical biology.”. (shrink)

In this paper, we present a prenex form theorem for a version of Independence Friendly logic, a logic with imperfect information. Lifting classical results to such logics turns out not to be straightforward, because independence conditions make the formulas sensitive to signalling phenomena. In particular, nested quantification over the same variable is shown to cause problems. For instance, renaming of bound variables may change the interpretations of a formula, there are only restricted quantifier extraction theorems, and slashed connectives cannot be (...) so easily removed. Thus we correct some claims from Hintikka [8], Caicedo & Krynicki [3] and Hodges [11]. We refine definitions, in particular the notion of equivalence, and sharpen preconditions, allowing us to restore those claims, including the prenex form theorem of Caicedo & Krynicki [3], and, as a side result, we obtain an application to Skolem forms of classical formulas. It is a known fact that a complete calculus for IF-logic is impossible, but with our results we establish several quantifier rules that form a partial calculus of equivalence for a general version of IF-logic reflecting general properties of information flow in games. (shrink)

We prove strong completeness of the □-version and the ◊-version of a Gödel modal logic based on Kripke models where propositions at each world and the accessibility relation are both infinitely valued in the standard Gödel algebra [0,1]. Some asymmetries are revealed: validity in the first logic is reducible to the class of frames having two-valued accessibility relation and this logic does not enjoy the finite model property, while validity in the second logic requires truly fuzzy accessibility relations and this (...) logic has the finite model property. Analogues of the classical modal systems D, T, S4 and S5 are considered also, and the completeness results are extended to languages enriched with a discrete well ordered set of truth constants. (shrink)

Several ethicists have defended the use of responsibility-based criteria in healthcare rationing. Yet in this article we outline two challenges to the implementation of responsibility-based healthcare rationing policies. These two challenges are, namely, that responsibility for past behavior can diminish as an agent changes, and that blame can come apart from responsibility. These challenges suggest that it is more difficult to hold someone responsible for health related actions than proponents of responsibility-sensitive healthcare policies suggest. We close by discussing public health (...) policies that could function as an alternative to contentious, responsibility-sensitive rationing policies. (shrink)

In this article we defend the inferential view of scientific models and idealisation. Models are seen as “inferential prostheses” (instruments for surrogative reasoning) construed by means of an idealisation-concretisation process, which we essentially understand as a kind of counterfactual deformation procedure (also analysed in inferential terms). The value of scientific representation is understood in terms not only of the success of the inferential outcomes arrived at with its help, but also of the heuristic power of representation and their capacity to (...) correct and improve our models. This provides us with an argument against Sugden’s account of credible models: the likelihood or realisticness (their “credibility”) is not always a good measure of their acceptability. As opposed to “credibility” we propose the notion of “enlightening”, which is the capacity of giving us understanding in the sense of an inferential ability. (shrink)

It is shown that axiomatic extensions of intuitionistic propositional calculus defining univocally new connectives, including those proposed by Gabbay, are strongly complete with respect to valuations in Heyting algebras with additional operations. In all cases, the double negation of such a connective is equivalent to a formula of intuitionistic calculus. Thus, under the excluded third law it collapses to a classical formula, showing that this condition in Gabbay's definition is redundant. Moreover, such connectives can not be interpreted in all Heyting (...) algebras, unless they are already equivalent to a formula of intuitionistic calculus. These facts relativize to connectives over intermediate logics. In particular, the intermediate logic with values in the chain of length n may be "completed" conservatively by adding a single unary connective, so that the expanded system does not allow further axiomatic extensions by new connectives. (shrink)

The aim of this paper is to strengthen the point made by Horty about the relationship between reason holism and moral particularism. In the literature prima facie obligations have been considered as the only source of reason holism. I strengthen Horty’s point in two ways. First, I show that contrary-to-duties provide another independent support for reason holism. Next I outline a formal theory that is able to capture these two sources of holism. While in simple settings the proposed account coincides (...) with Horty’s one, this is not true in more complicated or “realistic” settings in which more than two norms collide. My chosen formalism is so-called input/output logic. A bottom-line example is introduced. It raises the issue of whether the conventional wisdom is right in assuming that normative reasons run parallel to epistemic ones. (shrink)

Cuerpo físico y cuerpo vivido no deben interpretarse como dos realidades separadas, sino que representan dos aspectos distintos de la misma experiencia corporal descrita en términos fenomenológicos. La experiencia de la corporalidad puede seguir dos direcciones: a) la primera es una dirección ascendente, que implica el desarrollo de las posibilidades de movimiento, acción y expresión del cuerpo en toda su plenitud; b) el otro camino o dirección, en contraste con el anterior, toma una senda descendente, y se halla estrechamente relacionado (...) con la experiencia del dolor, de la limitación, de la resistencia corporal que es experimentada como oposición a la propia voluntad: es el cuerpo vulnerable. Aquí reaparece un nuevo dualismo: el cuerpo poético de la expresión frente al cuerpo vulnerable de la enfermedad y el dolor. Mi contribución trata de cuestionar la idea de que el cuerpo poético de la expresión artística y el cuerpo vulnerable de la vejez, de la discapacidad o de la enfermedad, pertenezcan a esferas completamente separadas. Con este propósito, se intenta poner de relieve los múltiples puntos de intersección entre ambas perspectivas, al tiempo que se sostiene que tales intersecciones pueden llegar a ser interesantes puntos de partida de la investigación interdisciplinar. (shrink)

This paper tackles an open problem posed by Åqvist. It is the problem of whether his dyadic deontic systemsEandFare complete with respect to their intended Hanssonian preference-based semantics. It is known that there are two different ways of interpreting what it means for a world to be best or top-ranked among alternatives. This can be understood as saying that it is optimal among them, or maximal among them. First, it is established that, under either the maximality rule or the optimality (...) rule,Eis sound and complete with respect to the class of all preference models, the class of those in which the betterness relation is reflexive, and the class of those in which it is total. Next, an analogous result is shown to hold forF. That is, it is established that, under either rule,Fis sound and complete with respect to the class of preference models in which the betterness relation is limited, the class of those in which it is limited and reflexive, and the class of those in which it is limited and total. (shrink)

In this article we critically evaluate an argument against state‐sanctioned euthanasia made by David Velleman in his 1992 paper ‘Against the right to die’. In that article, Velleman argues that legalizing euthanasia is morally problematic as it will deprive eligible patients of the opportunity of staying ‘alive by default’. That is to say, those patients who are rendered eligible for euthanasia as a result of legislative reform will face the burden of having to justify their continued existence to their epistemic (...) peers if they are to be perceived as ‘reasonable’. We discuss potential criticisms that could be made of the argument, and consider how a defender of the view might respond. Velleman’s argument is particularly interesting as it is a consequentialist argument against state‐sanctioned euthanasia, challenging the many consequentialist arguments that have been made in favour of legalizing the procedure. We conclude by suggesting that further research on the question of unfair burdens is important to adequately evaluating the potential harms of legalizing euthanasia for patients at the end of life. (shrink)

It is shown that axiomatic extensions of intuitionistic propositional calculus defining univocally new connectives, including those proposed by Gabbay, are strongly complete with respect to valuations in Heyting algebras with additional operations. In all cases, the double negation of such a connective is equivalent to a formula of intuitionistic calculus. Thus, under the excluded third law it collapses to a classical formula, showing that this condition in Gabbay's definition is redundant. Moreover, such connectives can not be interpreted in all Heyting (...) algebras, unless they are already equivalent to a formula of intuitionistic calculus. These facts relativize to connectives over intermediate logics. In particular, the intermediate logic with values in the chain of length n may be "completed" conservatively by adding a single unary connective, so that the expanded system does not allow further axiomatic extensions by new connectives. (shrink)

This paper examines the logic of conditional obligation, which originates from the works of Hansson, Lewis, and others. Some weakened forms of transitivity of the betterness relation are studied. These are quasi-transitivity, Suzumura consistency, acyclicity and the interval order condition. The first three do not change the logic. The axiomatic system is the same whether or not they are introduced. This holds true under a rule of interpretation in terms of maximality and strong maximality. The interval order condition gives rise (...) to a new axiom. Depending on the rule of interpretation, this one changes. With the rule of maximality, one obtains the principle known as disjunctive rationality. With the rule of strong maximality, one obtains the Spohn axiom (also known as the principle of rational monotony, or Lewis’ axiom CV). A completeness theorem further substantiates these observations. For interval order, this yields the finite model property and decidability of the calculus. (shrink)

XAVIER, Joelma Aparecida dos Santos. A disciplina de Cultura Religiosa na PUC Minas : aspectos fenomenológicos e éticos como tópos privilegiado do diálogo. Dissertação (Mestrado) 2013. 96p. - Pontifícia Universidade Católica de Minas Gerais, Programa de Pós-graduação em Ciências da Religião, Belo Horizonte.

Xavier Zubiri entiende que el tema del mundo, a pesar de tener una noble prosapia en la historia de la filosofía, ha sido desatendido por la mayor parte del pensamiento reciente. Posiblemente fue Descartes el último gran filósofo en escribir un tratado dedicado temáticamente al problema del mundo. Es como si la atención a las cosas que hay en el universo hubiera hecho que se perdiera de vista el problema del universo mismo. Por supuesto, no faltan filósofos contemporáneos que (...) hayan hablado del mundo. Pero Zubiri entiende que esos filósofos lo han hecho de una manera unilateral, atendiendo únicamente al diálogo con las ciencias humanas, y desarrollando de esta manera conceptos del mundo en los que no caben las aportaciones de las ciencias naturales. Ahora bien, ya en el año 1960 Zubiri señalaba que no sólo la historia humana, sino también los nuevos descubrimientos en ciencias tales como la astronomía o la biología exigían que la filosofía se volviera a enfrentar sistemáticamente con la cuestión filosófica del mundo. Esto es lo que Zubiri hizo en este curso, impartido en la Cámara de Comercio de Madrid, y que ahora presentamos a los lectores. Sin duda, el medio siglo transcurrido desde entonces haría necesaria una actualización de las informaciones científicas que Zubiri manejaba. Sin embargo, muchos de los conceptos desarrollados por él en aquellas lecciones, precisamente por su novedad, por su radicalidad, y por su apertura a una concepción abierta y dinámica de la ciencia, siguen siendo relevantes en el presente. No sólo eso. En una última y extensa lección Zubiri se planteó una cuestión crucial para la filosofía: la de un posible fundamento del mundo. También aquí su profundo conocimiento de la historia del pensamiento, su rigor y al mismo tiempo su originalidad filosófica, siguen siendo inspiradores para los lectores contemporáneos. (shrink)

An extensions by new axioms and rules of an algebraizable logic in the sense of Blok and Pigozzi is not necessarily algebraizable if it involves new connective symbols, or it may be algebraizable in an essentially different way than the original logic. However, extension whose axioms and rules define implicitly the new connectives are algebraizable, via the same equivalence formulas and defining equations of the original logic, by enriched algebras of its equivalente quasivariety semantics. For certain strongly algebraizable logics, all (...) connectives defined implicitly by axiomatic extensions of the logic are explicitly definable. (shrink)

Before his death in 1989, Gilbert Simondon wrote two major books consisting of his principal and complementary theses, both defended in 1958. The complementary thesis on the mode of existence of technical objects was published in 1958, while it was only in 1964 that sections of his principal thesis on individuation were made available to the public (and even then only the chapters dedicated to the regimes of physical and vital individuation, excluding those dealing with psychic and collective individuation.) Over (...) the course of his career, Simondon produced other major texts, but only in the form of unpublished courses or conference presentations published in poorly distributed journals. Some of these texts have .. (shrink)

‘Epistemic’ arguments for conservatism typically claim that given the limits of human reason, we are better off accepting some particular social practice or institution rather than trying to consciously improve it. I critically examine and defend here one such argument, claiming that there are some domains of social life in which, given the limits of our knowledge and the complexity of the social world, we ought to defer to those institutions that have robustly endured in a wide variety of circumstances (...) in the past while not being correlated with intolerable outcomes. These are domains of social life in which our ignorance of optimal institutions is radical, and there is uncertainty about the costs of error. This is an argument for the preservation of particular institutions, not particular policies or outcomes, and it specifically identifies these with the institutions that John Rawls called ‘the basic structure of society.’ The argument further implies that to the extent that there is any reason to change these institutions, changes should be calculated as far as possible to increase their ‘epistemic power.’. (shrink)

An extensions by new axioms and rules of an algebraizable logic in the sense of Blok and Pigozzi is not necessarily algebraizable if it involves new connective symbols, or it may be algebraizable in an essentially different way than the original logic. However, extension whose axioms and rules define implicitly the new connectives are algebraizable, via the same equivalence formulas and defining equations of the original logic, by enriched algebras of its equivalente quasivariety semantics. For certain strongly algebraizable logics, all (...) connectives defined implicitly by axiomatic extensions of the logic are explicitly definable. (shrink)

In Racial Prescriptions, Jonathan Xavier Inda offers a critical and timely analysis of the making of BiDil, the first drug that was marketed exclusively to African Americans. Sibille Merz speaks to him about the re-articulation of racial politics under neoliberalism, the legacies of scientific racism and the molecularization of biopolitics in the genomic age.

F.W.J. Schelling (1775-1854), le plus precoce de philosophes puis l'un des plus ages, a pati, de son vivant comme apres sa mort, de la proximite de Fichte et surtout de Hegel qui l'a supplante dans le jugement de la posterite. Mais il est en passe de combler son retard grace en particulier a l'impulsion donnee depuis un demi-siecle aux recherches sur l'idealisme allemand. Le premier volume de cet ouvrage se propose de presenter le devenir de Schelling sous le signe du (...) systeme vivant. La derniere philosophie de Schelling est analysee dans le second tome. Elle est presque tout entiere posthume, a l'exception de la Preface a Cousin (1834) et de quelques autres textes brefs. La dualite philosophique, enseignee a Berlin, est l'ultime avatar de ce qui etait de facon latente une philosophie en deux. L'auteur s'attache ici a expliquer en detail les motifs et les problemes de cette dichotomie tardive, mais fondee. (shrink)

In this paper we present a new framework of idealization in biology. We characterize idealizations as a network of counterfactual and hypothetical conditionals that can exhibit different “degrees of contingency”. We use this idea to say that, in departing more or less from the actual world, idealizations can serve numerous epistemic, methodological or heuristic purposes within scientific research. We defend that, in part, this structure explains why idealizations, despite being deformations of reality, are so successful in scientific practice. For illustrative (...) purposes, we provide an example from population genetics, the Wright-Fisher Model. (shrink)