Popper conceived an experiment whose analysis led to a result that he deemed absurd. Popper wrote that his reasoning was based on the Copenhagen interpretation and therefore invalidated it. Many authors who have examined Popper's analysis have found in it various technical flaws which are briefly summarized here. However, the aim of the present article is not technical. My concern is to redress logical flaws in Popper's argument: the terminology he uses is ambiguous, his analysis involves counterfactual hypotheses, and it (...) violates Bohr's complementarity principle. Therefore, the absurdity of Popper's result only confirms Bohr's approach. (shrink)

The proof of Bell's inequality is based on the assumption that distant observers can freely and independently choose their experiments. As Bell's inequality isexperimentally violated, it appears that distant physical systems may behave as a single, nonlocal, indivisible entity. This apparent contradiction is resolved. It is shown that the “free will” assumption is, under usual circumstances, an excellent approximation.I have set before you life and death, blessing and cursing: therefore choose life.... —Deuteronomy XXX, 19.

Lately, nanotechnology has become one of the main topics in the debates regarding what has been called the _Next Industrial Revolution_ within what are known as _emergent technologies_. This paper contains a comparative analysis of the different philosophical groundings, arguments and principles invoked in the official ethical approaches proposed by each of two of the main Western communities. By _official ethical approaches_ or _official positions_ we mean the opinions officially expressed by the government institutions about how ethical considerations prompted by (...) nanotechnologies should be tackled. The analysis is based, then, on the official points of view, expressed through two documents, namely two official releases issued by governmental offices or institutions in both communities, Europe and the United States of America, and considered by the authors as representative of the official opinions of the governmental institutions in each society. (shrink)

Planear una "estética plural de la naturaleza" es darle a la obviedad del enunciado que se trata de explorar algo parecido a un impulso haciéndolo avanzar por el camino de la complejidad. Esto en primer lugar. Después, hay que pararse a pensar que la articulación de estos términos, arte y naturaleza, no sólo implica enlazar la actividad relativa al primero con una imagen o arsenal de imágenes en las que esta segunda se representaría; también es vincularla a un concepto que (...) la significa. ¿Cuál? Lógicamente, la imitación, la mímesis. Aunque dadas las variaciones que ha sufrido dicho concepto a lo largo de la historia, parece necesario valorar la necesidad de comprender su objeto, la naturaleza, en lo que llamaría su dinamismo temporal. En otras palabras, habría que intentar una "historia de la naturaleza", cuya oportunidad aconsejaría mantenerla en paralelo con la "historia del arte". Y si este paralelismo -desde luego estético- del arte y la naturaleza implica en sus respectivas trayectorias temporales aquella parte de la reflexión estética que explora cada momento histórico con una atención especial en el "arte como mímesis", entonces el objetivo de dicha reflexión será también la naturaleza, que toca ir a buscar allí donde se encuentra efectivamente: en el pensamiento de la época. Tendríamos así los términos Arte, Naturaleza, Mímesis. Y de este último, la Mímesis, ya sabemos que no es la representación fiel de entidades o configuraciones naturales. ¿Qué es entonces? La proyección en una obra de Arte de unos contenidos mentales que tienen por objeto la Naturaleza. Quedan vinculados así los tres términos barajados en este libro. (shrink)

The Einstein–Podolsky–Rosen paradox (1935) is reexamined in the light of Shannon’s information theory (1984). The EPR argument did not take into account that the observer’s information was localized, like any other physical object.

Bell inequalities are derived for any number of observers, any number of alternative setups for each one of them and any number of distinct outcomes for each experiment. It is shown that if a physical system consists of several distant subsystems, and if the results of tests performed on the latter are determined by local variables with objective values, then the joint probabilities for triggering any given set of distant detectors are convex combinations of a finite number of Boolean arrays, (...) whose components are either 0 or 1 according to a simple rule. This convexity property is both necessary and sufficient for the existence of local objective variables. It leads to a simple graphical method which produces a large number of generalized Clauser-Horne inequalities corresponding to the faces of a convex polytope. It is plausible that quantum systems whose density matrix has a positive partial transposition satisfy all these inequalities, and therefore are compatible with local objective variables, even if their quantum properties are essentially non-local. (shrink)

O artigo procura argumentar contra a ideia de que a filosofia da história de Kant contaria com dois modelos de fundamentação: um modelo oficial, de natureza hipotético-teleológica, e outro hermenêutico-explicativo, que, porém, acabaria por implodir o sistema. Trata-se de mostrar que há um único modelo, de natureza hermenêutica-explicativa, que não obstante faz uso de princípios hipotético-teleológicos. Mais ainda, que tal modelo está presente ao longo de diversos momentos do sistema, como na Doutrina do Direito, ou na Religião nos limites da (...) simples razão. The article argues against the idea that Kant's philosophy of history would have included two types of foundation: an official model, hypothetical and teleological in nature, and other hermeneutic-explanatory, the last one that eventually would implode the system. The aim is to show that there is a single model, of hermeneutics-explanatory nature, which nevertheless makes use of hypothetical and teleological principles, and that such a model is present at various moments throughout the system, as in the Doctrine of Right, or in the Religion within the limits of pure reason. (shrink)

Linear combinations of “elements of reality,” as defined by Einstein, Podolsky, and Rosen, may not be themselves “elements of reality.” There are questions which can be formulated (and unambiguously answered) in the ordinary language of experimental physics, but cannot be represented in the mathematical framework of quantum theory in a nontrivial way.

Classical propositional logic plays a prominent role in industrial applications, and yet the complexity of this logic is presumed to be non-feasible. Tractable systems such as depth-bounded boolean logics approximate classical logic and can be seen as a model for resource-bounded agents whose reasoning style is nonetheless classical. In this paper we first study a hierarchy of tractable logics that is not defined by depth. Then we extend it into a modal logic where modalities make explicit the assumptions discharged in (...) propositional proofs, thereby expressing blueprints for proofs. A natural deduction system is provided that permits to reason about and manage such proof blueprints. (shrink)

It is well known that in the first edition of Logical Investigations , Husserl defines the research field of phenomenology as a psychological immanence. However, if we closely examine the criteria used for defining the psychological immanence, we find that they imply certain conception of transcendence of the intentional object. This conception of transcendence leads to epistemological problems concerning the relationship between the physical object and the object of perception. After all, it would be correct to say that the physical (...) object is transcendent in the same sense which it is stated that the perceived object is transcendent to the experience of perceiving? This article seeks to show how the transcendental turn of 1906/1907 and the consequent distinction between three concepts of immanence and transcendence in his work Idea of Phenomenology contributed to solving such problems. (shrink)

The Purūravac-cakkiravartti-katai, “The Story of Emperor Purūravas,” is a pre-modern Tamil folk telling of the ancient Urvaśī-Purūravas legend. The classical narrative of King Purūravas of the Lunar Dynasty tells about his love affair with the celestial nymph Urvaśī, their tragic separation, and final reunion. The PCK follows the classical narrative closely, but interposes a long account of other exploits of Purūravas, which do not appear in any of the Sanskrit tellings of the story. In this supplement, which I call “The (...) Tamil Life of Purūravas,” Purūravas faces a tragic chain of unavoidable events, but eventually restores his former status through meditation and devotion. A comparative examination of the two parts of the text, that is, the classical narrative and the Tamil Life, shows that the latter generates an inverted mirror image of the fundamental notions implied in the classical narrative. The outcome of this structure is a shift in the ideological tendencies of the narrative toward a local ethos and popular religious notions. The PCK is thus shown to be a field of cultural negotiations, in which opposing ideologies contend for superiority, and its structure can be regarded as a transformative mechanism applied by local and popular cultural forms to enable appropriation of classical narrative traditions. (shrink)

Name der Zeitschrift: Deutsche Zeitschrift für Philosophie Jahrgang: 66 Heft: 5 Seiten: 737-745.

The city of lions. Beaulieu-sur-Dordogne. The war starts. Drôle de guerre. Going to work. Going to school. Fleeing from village to village. Playing cat and mouse. The second landing. Return to Beaulieu. Return to Paris. Joining the boyscouts. Learning languages. Israel becomes independent. Arrival in Haifa. Kalay high school. Military training. The Hebrew Technion in Haifa. Relativity. Asher Peres. Metallurgy. Return to France. Escape from jail. Aviva.I am the cat who walks by himself, and all places are alike to me.Rudyard (...) KiplingI am grateful to all those who contributed to this Festschrift which celebrates my 70th birthday and therefore the beginning of my eighth decade. In the Jewish religion, there is a prayer, “she-hehhyanu” to thank the Lord for having kept us alive and let us reach this day. I am an atheist and I have no Lord to thank, but I wish to thank many other people who are no longer alive and who helped me reach this point. (shrink)

Esports have transformed playing video games into a competitive activity that bears similarities to sports and the processes of sportization. Taking as a starting point the concept of sports as competitive games, the objective of this work is to analyse the sportization of esports, as well as the impact of esports on the concept of sports and their implications on sports in the immediate future. Sports and esports are two different realities that interact with each other. This is a conceptual (...) problem for sports, and it also defines a practical challenge in the immediate future of sports. The virtual environment offers new possibilities in sports, such as broadening the possibilities of confrontation and competition development, contributing to reducing the environmental impact of certain sports, improving safety and maintaining the physical integrity of athletes, and increasing social justice and equality of chances in sports competitions. The challenge, therefore, is to try to bring esports and sports closer together, even moving toward hybrid sports, as addressed throughout this article. (shrink)

The physicist not only observes phenomena, but he also has an active role in the formulation of some laws. For instance, laws involving irreversibility refer explicitly to what can or cannot be done by physicists. As the abilities of the latter may vary, we obtain sequences of laws, the convergence of which is discussed.

After Lavoisier's execution, the leading French chemists were Antoine-François Fourcroy , Louis-Bernard Guyton de Morveau and Claude-Louis Berthollet . At the beginning of the nineteenth century, Berthollet introduced a new conception of chemical change that challenged the theory of elective affinities which had dominated chemistry for nearly a hundred years. Berthollet's new affinities raised controversy among chemists and had to coexist with the firmly established theory of elective affinities. Apart from the public debate in research articles, Berthollet's affinities also had (...) to compete with the influence of Fourcroy and his school in the textbook market. This paper seeks to assess the extent to which French textbooks published at the beginning of the nineteenth century were committed to Berthollet's innovation, and how they contributed to its marginalization. (shrink)

The purpose of this paper is to review and clarify the quantum “measurement problem.” The latter originates in the ambivalent nature of the “observer”: Although the observer is not described by the Schrödinger equation, it should nevertheless be possible to “quantize” him and include him in the wave function if quantum theory is universally valid. The problem is to prove that no contradiction may arise in these two conflicting descriptions. The proof invokes the notion of irreversibility. The validity of the (...) latter is questionable, because the standard rationale for classical irreversibility, namely mixing and coarse graining, does not apply to quantum theory. There is no chaos in a closed, finite quantum system. However, when a system is large enough, it cannot be perfectly isolated from its “environment,” namely from external (or even internal) degrees of freedom which are not fully accounted for in the Hamiltonian of that system. As a consequence, the long-range evolution of such a quantum system is essentially unpredictable. It follows that the notion of irreversibility is a valid one in quantum theory and the “measurement problem” can be brought to a satisfactory solution. (shrink)