Theory change is a central concern in contemporary epistemology and philosophy of science. In this paper, we investigate the relationships between two ongoing research programs providing formal treatments of theory change: the (post-Popperian) approach to verisimilitude and the AGM theory of belief change. We show that appropriately construed accounts emerging from those two lines of epistemological research do yield convergences relative to a specified kind of theories, here labeled “conjunctive”. In this domain, a set of plausible conditions are identified which (...) demonstrably capture the verisimilitudinarian effectiveness of AGM belief change, i.e., its effectiveness in tracking truth approximation. We conclude by indicating some further developments and open issues arising from our results. (shrink)

This textbook presents the basics of philosophy that are necessary for the student and researcher in science in order to better understand scientific work. The approach is not historical but formative: tools for semantical analysis, ontology of science, epistemology, and scientific ethics are presented in a formal and direct way. The book has two parts: one with the general theory and a second part with application to some problems such as the interpretation of quantum mechanics, the nature of mathematics, and (...) the ontology of spacetime. The book addresses questions such as "What is meaning?", "What is truth?", "What are truth criteria in science?", "What is a theory?", "What is a model?" "What is a datum?", "What is information?", "What does it mean to understand something?", "What is space?", "What is time?", "How are these concepts articulated in science?" "What are values?" "What are the limits of science?", and many more. The philosophical views presented are "scientific" in the sense that they are informed by current science, they are relevant for scientific research, and the method adopted uses the hypothetical-deductive approach that is characteristic of science. The results and conclusions, as any scientific conclusion, are open to revision in the light of future advances. Hence, this philosophical approach opposes to dogmatic philosophy. Supported by end-of-chapter summaries and a list of special symbols used, the material will be of interest for students and researchers in both science and philosophy. The second part will appeal to physicists and mathematicians. (shrink)

In recent years, Cesar Chavez’s life and legacy have been subjected to increased scrutiny. The ensuing reevaluations of Chavez, wittingly or not, are matters of ethical, as well as historical and biographical, concern. This article has two aims. First, it reconstructs Chavez’s account of exemplarity and uses it to assess his legacy. Second, it provides an account of exemplarity situated within social practices. As I argue, exemplarity operates through social practices, rather than mystically as posited by a contagion model. The (...) end result is an ethically nuanced reassessment of Chavez and an account of exemplarity that includes its social dimension. (shrink)

We thank the commentators for the dialog and discussion they have proposed. We begin by remarking that telling and listening to stories are not an original thesis, especially if interpretive hermeneutics and phenomenology are central references. Academic and institutional settings are diverse if we consider the universe of empirical research grounded on philosophical methods and the teaching universe of practical and clinical disciplines, like psychiatry. The teaching of these disciplines frequently presents them merely as technics. A double reduction is performed: (...) the philosophical dimension of any and every technic is removed, and those who would benefit from this knowledge are presented as simple data... (shrink)

The end of the 1990s witnessed the development of evidence-based medicine, which proposed to screen, organize, and classify knowledge production in the health sciences. In this period, an increasing number of scientific publications started to incorporate the digital format and became easily accessible through the Internet. Since then, we have become used to the idea that there is a hierarchy in medical evidence. Its upper stratum, the gold standard of evidence, contains systematic reviews and meta-analyses of randomized clinical trials. The (...) base of such hierarchy contains case studies, clinical cases, and personal opinions.This knowledge hierarchy is not harmless. It has practical influences on... (shrink)

I present a discussion of some issues in the ontology of spacetime. After a characterisation of the controversies among relationists, substantivalists, eternalists, and presentists, I offer a new argument for rejecting presentism, the doctrine that only present objects exist. Then, I outline and defend a form of spacetime realism that I call event substantivalism. I propose an ontological theory for the emergence of spacetime from more basic entities. Finally, I argue that a relational theory of pre-geometric entities can give rise (...) to substantival spacetime in such a way that relationism and substantivalism are not necessarily opposed positions, but rather complementary. In an appendix I give axiomatic formulations of my ontological views. (shrink)

In 1982 Posner and Schmidt surveyed the values of 1400 managers. The survey revealed that honesty was one of the qualities that these managers admired most in themselves. An earlier study by Brennan and Molander indicated that managers believed that honesty in communication was their greatest ethical challenge. If honesty is a prevalent value among managers then why is honesty in communication their greatest ethical challenge? This paper presents an insight into the answer to this question and into the beliefs (...) and norms of behavior that foster either a candid corporate culture or a culture that lacks candor. (shrink)

A supertask consists in the performance of an infinite number of actions in a finite time. I show that any attempt to carry out a supertask will produce a divergence of the curvature of spacetime, resulting in the formation of a black hole. I maintain that supertaks, contrarily to a popular view among philosophers, are physically impossible. Supertasks, literally, collapse under their own weight.

Os textos reunidos nesta obra foram agrupados em cinco temáticas - Sobre a Ciência - Teoria e Método; Sobre a Física; Sobre a Educação; Sobre a Universidade; Sobre o Existir. Em seguida, são apresentados episódios da trajetória profissional do professor.

I argue for a four dimensional, non-dynamical view of space-time, where becoming is not an intrinsic property of reality. This view has many features in common with the Parmenidean conception of the universe. I discuss some recent objections to this position and I offer a comparison of the Parmenidean space-time with an interpretation of Heraclitus’ thought that presents no major antagonism.

Black holes are extremely relativistic objects. Physical processes around them occur in a regime where the gravitational field is extremely intense. Under such conditions, our representations of space, time, gravity, and thermodynamics are pushed to their limits. In such a situation philosophical issues naturally arise. In this chapter I review some philosophical questions related to black holes. In particular, the relevance of black holes for the metaphysical dispute between presentists and eternalists, the origin of the second law of thermadynamics and (...) its relation to black holes, the problem of information, black holes and hypercomputing, the nature of determinsim, and the breakdown of predictability in black hole space-times. I maintain that black hole physics can be used to illuminate some important problems in the border between science and philosophy, either epistemology and ontology. (shrink)

This paper will present a review of the approaches being taken to select the management of organizations resulting from mergers and the methods employed in determining the individuals who will be terminated when there are redundancies. Current approaches are ethically questionable and poor substitutes for a meaningful performance evaluation system.

En este artículo se presenta una caracterización del concepto de falacia, con énfasis en la llamada ‘falacia de apelación a lo natural’. Se explica el alcance de esta falacia, y su peligrosidad, en particular en el ámbito de las ciencias de la salud y de alimentos.

This paper discusses the logical space of alternative conceptual engineering projects, with a specific focus on (1) the processes, (2) the targets and goals, and (3) the methods of such projects. We present an overview of how these three aspects interact in the contemporary literature and discuss those alternative projects that have yet to be explored based on our suggested typology. We show how choices about each element in a conceptual engineering project constrain the possibilities for the others, thereby giving (...) rise to distinct groupings of possible projects under the banner of conceptual engineering. We conclude with a critical reflection on the potential ethical issues that arise as a result of effectively putting conceptual engineering into practice. (shrink)

--Os quarto imperios.--O imperio de Carneiro.--O Imperio daLôba.--O imperio do Capricornio.--O imperio do Cordeiro.

El artículo analiza la justificación deliberativa de la revisión judicial a partir los originales aportes de la obra de Carlos Nino. Propone que el deliberativismo solo puede defender consistentemente un rol para la revisión judicial si esta se orienta radicalmente a las condiciones justificatorias y deliberativas de las decisiones, prácticas y políticas públicas, y no a la evaluación sustantiva de su consistencia con los derechos fundamentales, incluso los que sean considerados precondiciones democráticas. Argumenta que la versión más difundida de las (...) tesis de Carlos Nino caía en una inconsistencia -al tratar de preservar un ámbito sustantivo para la revisión judicial relacionado con los derechos a priori- y reconstruye una versión alternativa y menos conocida, articulada en uno de sus últimos libros, en la que la revisión judicial es articulada en clave radicalmente procedimental-justificatoria. The paper analyzes the deliberative justification of judicial review centered on the original contribution of Carlos Nino’s work. It proposes that deliberativism can only defend, consistently, a role for judicial review in a democracy if the institution is radically oriented to the justificatory and deliberative conditions of public policies, practices and decisions, abandoning any substantive evaluation of their consistency with fundamental rights, even those that are considered as democratic preconditions. The paper argues that the most known version of Carlos Nino’s thesis on the subject was partially inconsistent -while trying to preserve some room for substantive judicial review related to a priori rights- and considers an alternative and less known version, presented in one of nino’s last books, where judicial review is constructed with that radically procedimental-justificatory approach. (shrink)

El trabajo reconstruye y analiza críticamente la respuesta de Jeremy Waldron a importantes problemas sobre política y derecho, justicia y autoridad. Waldron reivindica al mismo tiempo una tesis no escéptica sobre la existencia los derechos morales-políticos, una tesis escéptica sobre la existencia de procedimientos epistémicos superiores para identificarlos, y una tesis positiva sobre la legitimidad política. El trabajo argumenta que su respuesta solo resulta consistente si se añade un cuarto vértice: el presupuesto de “igualdad de agencia y capacidad epistémica” en (...) los portadores de derechos. Pero su introducción requiere abandonar y redefinir dos de los otros elementos, lo que conduce finalmente a las respuestas típicas del deliberativismo epistémico. Las críticas de Waldron a la revisión judicial se reinterpretan sobre esa nueva base. (shrink)

“Seguramente, hasta hoy no creía que no aumentará de peso ni se achicará al aumentar la velocidad de la nave, ni que lo que es ahora para usted ya pasó para Fulano y aún no ocurrió para Zutano, ¿verdad? Desengáñese, porque el autor de este libro, nada menos que profesor de astrofísica relativista y autoridad mundial en agujeros negros y otros portentos, le hará dudar de todo eso” (del prólogo de Mario Bunge). -/- -/- “Como Borges —escribe el autor—, he (...) sentido que el del tiempo es el problema esencial de la metafísica de Occidente. Lo he estudiado durante más de 30 años. Me convertí en físico relativista por este problema. Y jamás rechacé la metafísica, como otros colegas, que, borrachos de ignorancia, desprecian lo que ignoran. Estudié lógica, semántica, ontología, epistemología. A veces los medios se transformaron en fines, y publiqué abundantemente filosofía. Siempre fui un outsider: un científico para los filósofos, un astrónomo para los físicos, un físico para los astrónomos. No me quejo: me evité lo peor de todos esos mundos”. -/- . (shrink)