Entre las valiosas piezas que conforman el rico tesoro de la catedral hispalense destacan un cáliz y un copón de oro y piedras preciosas, joyas sobre las que existen pocas y confusas noticias. En este artículo se aclaran definitivamente diversos aspectos sobre su origen, autoría y ejecución.

En este trabajo se ofrece un bosquejo biográfico de H. L. A. Hart así como una reconstrucción del contexto cultural y filosófico en el que forjó su pensamiento. En la primera parte se proporcionan los datos más relevantes de su biografía, entre los que destaca su participación en los servicios de inteligencia durante la Segunda Guerra Mundial. Posteriormente, el trabajo incursiona en el panorama filosófico británico de principios del siglo XX, durante la llamada revuelta anti-idealista, que es donde se ubican (...) los orígenes de la moderna filosofía analítica. Es allí donde encontramos los antecedentes del método filosófico de Hart; concretamente, en la corriente de la filosofía del lenguaje ordinario encabezada por J. L. Austin. El autor concluye con una serie de testimonios del propio Hart donde se evidencia lo anterior y plantea algunos temas para futuras investigaciones. (shrink)

In 2000, the world of anthropology was rocked by a high-profile debate over the fieldwork performed by two prominent anthropologists, Napoleon Chagnon and James V. Neel, among the Yanamamo tribe of South America. The controversy was fueled by the publication of Patrick Tierney's incendiary Darkness in El Dorado which accused Chagnon of not only misinterpreting but actually inciting some of the violence he perceived among these "fierce people". Tierney also pointed the finger at Neel as the unwitting agent of a (...) deadly measles outbreak. Attracting a firestorm of attention, Tierney's book went straight to the heart of anthropology's most pressing questions: What are the right ways to study a tribal people? How can scientists avoid unduly influencing those among whom they live? What guidelines should govern the interactions - economic, social, medical, and sexual - between a scientist in the field and the people being studied? This volume represents anthropology's thoughtful, measured reply to the issues raised by this heated controversy. Placing the dispute within the context of ongoing debates over the ethics of biomedical research among human populations, the contributors to this volume discuss how the interaction between investigators and their subjects can most sensibly be governed. They consider the responsibility of the media in disseminating anti-scientific and pseudo-scientific views, and how scientists might best educate journalists to enable them to effectively educate others. In the wake of what was widely construed as a major scientific scandal, this landmark volume lays out in detail the principles and ground rules of anthropological and scientific fieldwork. (shrink)

In this paper the structure of pretemporal algebra is used to study some aspects of temporal algebras and modal algebras. The paper contains a computational approach to finite temporal algebras and a general splitting theorem for finite temporal algebras.

In the paper we obtain a new characterization of the BCK-algebras which are subdirect product of BCK-chains. We give an axiomatic algebraizable extension of the BCK-calculus, by means of a recursively enumerable set of axioms, such that its equivalent algebraic semantics is definitionally equivalent to the quasivariety of BCK-algebras generated by the BCK-chains. We propose the concept of "linearization of a system" and we give some examples.

In this paper an algebraic version for temporal algebras of the logical filtrations for modal and temporal logics is analysed. A structure theorem for free temporal algebras and also some results with regard to the variety of temporal algebras are obtained.

En el presente estudio analizaremos la expresión del conflicto en el lenguaje, donde la lucha palabra-letra impregna la teoría agónica del lenguaje y marca la trascendencia sobre la relación historia-intrahistoria. Asimismo, presentaremos la dimensión creadora del lenguaje, relevante desde el Unamuno contemplativo, y el papel desempeñado por el diálo go a la hora de expresar los dos poíos del conflicto, agónico y contem plativo.

In this paper a definition of n-valued system in the context of the algebraizable logics is proposed. We define and study the variety V3, showing that it is definitionally equivalent to the equivalent quasivariety semantics for the “Three-valued BCK-logic”. As a consequence we find an axiomatic definition of the above system.

In this paper we consider twelve classical laws of negation and study their relations in the context of BCK-algebras. A classification of the laws of negation is established and some characterizations are obtained. For example, using the concept of translation we obtain some characterizations of Hilbert algebras and commutative BCK-algebras with minimum. As a consequence we obtain a theorem relating those algebras to Boolean algebras.

RESUMEN: Este trabajo tiene como finalidad destacar la contribución específica de H.L.A. Hart sobre el problema del positivismo jurídico. A juicio del autor, el tratamiento que Hart dio a la polémica entre positivismo jurídico y Derecho Natural estuvo marcada por dos extremos aparentemente contradictorios. Por una parte, se abocó a clarificar las diversas tesis que anidan tras la etiqueta “positivismo jurídico”, así como las posiciones que suelen referirse como tales. Al hacerlo abrió el camino para mostrar en qué sentido no (...) resulta ilógico defender algunas tesis asociadas al mismo o negar otras. Por otra parte, y si bien no asumió una posición que afirmase la conexión necesaria entre Derecho y moral, se ocupó también de mostrar en qué sentido tal conexión existe y es importante. Con dicho objetivo, en el primer apartado se ofrece una reconstrucción detallada sobre el tratamiento que Hart hizo sobre el problema del positivismo jurídico. En el segundo se expone el tratamiento del autor sobre el iusnaturalismo, con la intención de comprender el lugar preciso e implicaciones de su conocida tesis del “contenido mínimo Derecho Natural”. En la tercera parte se aborda la teoría elaborada por Hart sobre el positivismo jurídico, esto es, el “positivismo jurídico hartiano” y las tesis por él defendidas. Importante aquí será su posición respecto a la posibilidad de que la regla de reconocimiento pueda incorporar criterios materiales para la identificación jurídica que nos introduce en una nueva etapa de la nunca acabada polémica. ABSTRACT: The aim of this work is to address H.L.A. Hart’s contribution to the problem of legal positivism. According to the author, Hart’s approach to the controversy of Natural Law/Legal Positivism was characterized by two apparently opposing ends. On the one hand, he clarified the label “Legal Positivism” as well as other approaches that are usually referred as such. In doing so, he paved the way to show in which sense it is not illogical to defend some theses associated with it and in which sense it is not. On the other hand, despite he did not take a stand for the necessary connection between Law and Morals, he did show in what sense such connection may exist and why it is important. To this end, section one offers a detailed reconstruction of Hart’s approach to the problem of legal positivism. In section two the author’s approach to Natural Law is explained so that his well-known thesis of “The Minimum Content of Natural Law”, and what it implies, is properly understood. Section three is devoted to Hart’s theory of Legal Positivism that is “Hartian Legal Positivism”, where his main claims are presented. Hart’s claim on the possibility for the rule of recognition to incorporate material criteria for legal identification or legal validity is particular relevant because it introduces us to a new stage of the never-ending controversy. PALABRAS CLAVE: H.L.A. Hart, positivismo jurídico, teorías de derecho natural, positivismo jurídico incluyenteKEYWORDS: H.L.A. Hart, legal positivism, natural law theories, inclusive legal positivism. (shrink)

La presente contribución recoge el diálogo mantenido entre distintos filósofos del Derecho a propósito de la última obra del Profesor Massimo La Torre “Il diritto contro se stesso. Saggio sul positivismo giuridico e la sua crisi”. Al hilo del trabajo del citado autor, los participantes reflexionan sobre preguntas centrales para la teoría y filosofía del Derecho contemporánea: ¿cuál es la naturaleza del Derecho? ¿es el razonamiento jurídico eminentemente moral? ¿qué lugar debe ocupar la práctica jurídica en su conceptualización? ¿qué lugar (...) ocupa la fuerza en el Derecho? (shrink)

As it is well known, in the forties of the past century, Curry proved that in any logic S closed under Modus Ponens, uniform substitution of propositional variables and the Contraction Law, the naïve Comprehension axiom trivializes S in the sense that all propositions are derivable in S plus CA. Not less known is the fact that, ever since Curry published his proof, theses and rules weaker than W have been shown to cause the same effect as W causes. Among (...) these, the Contraction rule or the Modus Ponens axiom, for example, are to be noted. But, moreover, as Brady has proved, even the Generalized Modus Ponens axiom or the Generalized Contraction rule give rise to “Curry’s Paradox” under the same circumstances as W does. In some previous work by us, “weak relevant model structures” are defined on “weak relevant matrices” by generalizing Brady’s model structure MCL built upon Meyer’s Crystal matrix CL. We have proved that wr-ms only verify logics with the “depth relevance condition”. The aim of this paper is to show how to falsify gMPa and gRW in certain wr-ms. In particular, it will be shown that gMPa is falisfied in any wr-ms and gRW in any wr-ms verifying Routley and Meyer’s basic positive logic B+. (shrink)

LCo with the Converse Ackermann Property is defined as the result of restricting Contraction in LC. Intuitionistic and Superintuitionistic Negation is shown to be compatible with the CAP.

We define two extensions of Lewis’ S3 with two versions of Peirce’s Law. We prove that both of them have the Ackermann Property.

The paper explores different possibilities in order of maintaining a compatibilism between free will, in a strong sense, and determinism. The notion of determinism is analyzed in deep. It is defended a general conception of free will as a certain kind of mental causation in absence of fatalism. Also, it is argued that other compatibilist possibilities would be possible inside that general conception of free will, being some of them more radical than other ones.

Pese a su origen y desarrollo filosófico, Lógica y Psicología, históricamente, han tendido no sólo a la disociación sino, más allá, al enfrentamiento. Durante décadas, excepción hecha de la llamada lógica intuicionista. la peor acusación que se le pudo hacer a un lógico fue la de psicologista. Sin embargo, lógica y psicología. tal y como pretende sena larse en este trabajo, no sólo están mucho más cercanas de lo que pudie ra parecer sino que. también, viven en una relación complementaria.

We define two extensions of Lewis’ S3 with two versions of Peirce’s Law. We prove that both of them have the Ackermann Property.

This paper is a sequel to ‘Belnap-Dunn semantics for natural implicative expansions of Kleene's strong three-valued matrix with two designated values’, where a ‘bivalent’ Belnap-Dunn semantics is provided for all the expansions referred to in its title. The aim of the present paper is to carry out a parallel investigation for all natural implicative expansions of Kleene's strong 3-valued matrix now with only one designated value.

El objetivo de este trabajo es teorizar el andamiaje integrado por las categorías de modos de apropiación de lo real, formas de la conciencia y contemplación estética, construida con referentes kantianos, hegelianos y marxistas. Con base en un esquema de investigación, los escritos más representativos fueron revisados y fichados en una base de datos; el fichero fue codificado y redactado el texto final. Se encontró que la conciencia individual se constituye con referentes de diferentes modos de apropiación de lo real (...) adquiriendo una forma determinada: empírica, mágico-religiosa, artística o teórica. A cada modo de apropiación corresponde una forma de conciencia y un determinado tipo de experiencia plena pero, la presencia de referentes de distintos modos de apropiación, permite que el mismo sujeto establezca experiencias de distinto tipo. (shrink)

Łukasiewicz three-valued logic Ł3 is often understood as the set of all 3-valued valid formulas according to Łukasiewicz’s 3-valued matrices. Following Wojcicki, in addition, we shall consider two alternative interpretations of Ł3: “well-determined” Ł3a and “truth-preserving” Ł3b defined by two different consequence relations on the 3-valued matrices. The aim of this paper is to provide dual equivalent two-valued under-determined and over-determined interpretations for Ł3, Ł3a and Ł3b. The logic Ł3 is axiomatized as an extension of Routley and Meyer’s basic positive (...) logic following Brady’s strategy for axiomatizing many-valued logics by employing two-valued under-determined or over-determined interpretations. Finally, it is proved that “well determined” Łukasiewicz logics are paraconsistent. (shrink)

Minimal Negation is defined within the basic positive relevance logic in the relational ternary semantics: B+. Thus, by defining a number of subminimal negations in the B+ context, principles of weak negation are shown to be isolable. Complete ternary semantics are offered for minimal negation in B+. Certain forms of reductio are conjectured to be undefinable (in ternary frames) without extending the positive logic. Complete semantics for such kinds of reductio in a properly extended positive logic are offered.

Business Ethics: A European Review, EarlyView.

Etude de l'extension par la negation semi-intuitionniste de la logique positive des propositions appelee logique C, developpee par A. Urquhart afin de definir une semantique relationnelle valable pour la logique des valeurs infinies de Lukasiewicz (Lw). Evitant les axiomes de contraction et de reduction propres a la logique classique de Dummett, l'A. propose une semantique de type Routley-Meyer pour le systeme d'Urquhart (CI) en tant que celle-la ne fournit que des theories consistantes pour la completude de celui-ci.

ABSTRACTPeer action coordination has been often studied in terms of its underlying cognitive mechanisms, and little is known about its emotional processes. The aim of the present study was to inves...

In this article, we propose a philosophical exploration on the main problems involved in two neurorights that concern autonomous action, namely free will and cognitive liberty, and sketch a possible solution to these problems by resourcing to a holistic interpretation of human actions. First, we expose the main conceptual and practical issues arising from the neuroright to “free will,” which are far from minor: the term itself is denied by some trends participating in the neurorights debate, the related concept of (...) ultimate control is also disputed, the understanding of free will depends on cultural context, and the exercise of being free to act in several domains may be covered by other regulations. Second, we analyze the historical origin of cognitive liberty, its current status, and its relation with free will. Third, we criticize the concept of decision in mainstream action theory and propose to conceive action as a unified process constituted by three explanatory, non-sequential dimensions: intention, decision, and action realization. Fourth, we discuss two possible cases involving neurotechnologies and suggest ways to interpret them according to a unified framework in which free will and cognitive liberty fall under a single neuroright to personal autonomy. Finally, we outline a recommendation to introduce freedom of thought and personal autonomy as complementary neurorights to protect both the internal and external dimensions of thought and action. (shrink)

The logic TM is the result of adding the mingle axiom, M to Ticket Entailment logic, T. In the present study, it is proved that TM has the variable-sharing property . Ternary relational semantics for TM is provided. Finally, an interesting extension of TM with the vsp is briefly discussed.

A restriction of R-Mingle with the variable-sharing property and the Ackermann properties is defined. From an intuitive semantical point of view, this restriction is an alternative to Anderson and Belnap’s logic of entailment E.

We present a new road map for research on “How the Brain Got Language” that adopts an EvoDevoSocio perspective and highlights comparative neuroprimatology – the comparative study of brain, behavior and communication in extant monkeys and great apes – as providing a key grounding for hypotheses on the last common ancestor of humans and monkeys and chimpanzees and the processes which guided the evolution LCA-m → LCA-c → protohumans → H. sapiens. Such research constrains and is constrained by analysis of (...) the subsequent, primarily cultural, evolution of H. sapiens which yielded cultures involving the rich use of language. (shrink)

A simple, bivalent semantics is defined for Łukasiewicz’s 4-valued modal logic Łm4. It is shown that according to this semantics, the essential presupposition underlying Łm4 is the following: A is a theorem iff A is true conforming to both the reductionist and possibilist theses defined as follows: rt: the value of modal formulas is equivalent to the value of their respective argument iff A is true, etc.); pt: everything is possible. This presupposition highlights and explains all oddities arising in Łm4.