Entendemos el concepto de “negación mínima” en el sentido clásico definido por Johansson. El propósito de este artículo es definir la lógica positiva mínima Bp+, y probar que la negación mínima puede introducirse en ella. Además, comentaremos algunas de las múltiples extensiones negativas de Bp+.“Minimal negation” is classically understood in a Johansson sense. The aim of this paper is to define the minimal positive logic Bp+ and prove that a minimal negation can be inroduced in it. In addition, some of (...) the many possible negation extensions of Bp+ are commented. (shrink)

The design of the bronchial tree has largely been proposed as a model of optimal design from a physical-functional perspective. However, the distributive function of the airway may be more related to a geometrical than a physical problem. The bronchial tree must distribute a three dimensional volume of inspired air on a two dimensional alveolar surface, included in a limited volume. It is thus valid to ask whether an optimal bronchial tree from a physical perspective is also optimum from a (...) geometrical point of view. In this paper we generate a simple geometric model for the branching pattern of the bronchial tree, deducing relationships that permit estimation of the departures from the geometrical optimum of each bifurcation. We also, for comparative purposes, estimate the departures from the physical optimum. From the geometrical assumptions: i) a symmetrical dichotomic fractal design, ii) with minimum volume and iii) maximum dispersion of the terminal points; and several simulations we suggest that the optimality is characterized by a bifurcation angle Θ ∼ 60° and a length reduction scale γ = (1/2)1/3 = 0.7937. We propose distances from the physical and geometrical optimality defined as Euclidean distances from the expected optima. We show how the advanced relationships and the distances can be used to estimate departures from the optimality in bronchographs of four species. We found lower physical and geometrical departures in the distal zone than those of the proximal zones, as well as lower physical than geometrical departures from optimality. (shrink)

En este artículo se expone una reflexión desde la propuesta teórica de Charles Taylor sobre la construcción de la identidad individual como una narración social frente a la crítica de Amartya Sen, quien propone la identidad como resultado solo de la elección personal. Se argumenta que las criticas que Amartya Sen hace a los argumentos de Taylor son infundadas, ya que la perspectiva de Charles Taylor se centra más en el carácter fundamentalmente constructivo, narrativo y dialógico de la identidad que (...) en la pérdida de la libertad y la mera aceptación acrítica de la identidad asumida. Se concluye que la identidad como narración social desde la perspectiva teoría de Taylor sí da cabida a la capacidad de elegir de los individuos y a la consideración de las identidades múltiples y múltiples lealtades identitarias, pero se hace notar la importacia del contexto social y del grupo por encima de la elección personal en el momento en que una persona contruye su identidad, ya que les da valor a los bienes externos como la comunidad cultural y lingüística a la que la pertenece y que hacen posible la inteligibilidad y la narracción de lo que somos y de quiénes somos. This paper presents Charles Taylor's theoretical proposal of construction of identity confronted to the criticism of Amartya Sen who conceives identity as a result of personal choice. It is argued that the critiques that Amartya Sen makes to the arguments of Taylor are groundless given that the perspective of Charles Taylor focuses more on the fundamentally constructive nature of identity than on the loss of freedom and the mere uncritical acceptance of the assumed identity. Taylor's theory does has space for the ability to choose and the consideration of multiple identities but it draws attention to the importance of social and group context when a person builds his identity and it assigns a higher value to the external goods that define the way people live in contemporary societies, such as the cultural and linguistic community, than to personal choice. (shrink)

This article tries to elucidate the Deleuzian project of the reversal of Platonism in relation to that of Nietzsche. To this aim, I have made a predominantly historiographic sketch of the question in both authors. In the case of Nietzsche, I inquired about both the relationship that the reversal of Platonism presents in his philosophy with the problem of nihilism and the evolution that the topic undergoes throughout his vast intellectual production, until it reaches its final formulation. With regard to (...) Deleuze, I offer a broad overview of his work aimed at tracing the subject, from his interpretation of the Nietzschean formulation, as opposed to that of Heidegger, to the meticulous way in which it fits into his own philosophy as a shift of the essence in favour of the event as a source of singularities. (shrink)

Semblanza de Alejandro Korn, por Francisco Romero.--Nota de la editorial.--San Agustín.--Pascal.--Introducción al estudio de Kant.--Kant.--Hegel.--Bergson.--Bergson en la filosofía contemporánea.--Croce.--Einstein y la filosofía.--Hermann Keyserling.

Resumo No Manifesto surrealista, de 1924, Breton explicita o produto da atividade surrealista como uma “luz de imagem”, gerado pela aproximação involuntária de duas realidades distantes. Essa estrutura dupla da imagem surrealista tem um caráter disruptivo, que rompe com a nossa percepção da realidade cotidiana. Com isso, abre-se a possibilidade de um espaço para a crítica social e histórica, bem como para uma intervenção estético-política justamente em uma sociedade na qual as formas tradicionais de crítica parecem estar neutralizadas. Essa experiência (...) surrealista e esse espaço aberto por ela Walter Benjamin caracteriza respectivamente com a fórmula “iluminação profana” e “espaço de imagem”. Ambos apresentam uma grande semelhança com alguns pontos e consequências, em seus conceitos, tanto de “imagem do pensamento”, como de “imagem dialética”, sobretudo na medida em que esses conceitos também são formulados em meio à crise cultural da sociedade europeia, nos 1920, e buscam uma saída revolucionária para a mesma. Trata-se de investigar aqui, por meio de uma análise comparativa dessas concepções de imagem, até onde vai a influência e a relevância do surrealismo para o pensamento figurativo-dialético de Benjamin e para sua compreensão da história.In the Surrealistic manifest from 1924, Andre Breton explains the product of surrealistic action as a “light of image” resulting from an arbitrary approach of two distant realities. This double structure of surrealistic image has a disrupting character that breaks our common perception of reality. Thus can open a space for social and historical criticism as well as for an aesthetical-political intervention in a society where traditional forms of criticism seem to be neutralized. Walter Benjamin defines this surrealistic experience and its opened space respectively with the expressions “profane illumination” and “image space”. Both have similarities with Benjamin’s ideas of “thought image” and “dialectical image”, especially because they were elaborated amidst the cultural european crisis in the 1920ies looking to find a revolutionary way out of it. Through a comparative analysis of these notions of image, this paper proposes to investigate the influence and the relevance of surrealism for Benjamin’s dialectical-figural way of thinking and his comprehension of history. (shrink)

Cognitive diagnosis models (CDMs) allow classifying respondents into a set of discrete attribute profiles. The internal structure of the test is determined in a Q-matrix, whose correct specification is necessary to achieve an accurate attribute profile classification. Several empirical Q-matrix estimation and validation methods have been proposed with the aim of providing well-specified Q-matrices. However, these methods require the number of attributes to be set in advance. No systematic studies about CDMs dimensionality assessment have been conducted, which contrasts with the (...) vast existing literature for the factor analysis framework. To address this gap, the present study evaluates the performance of several dimensionality assessment methods from the factor analysis literature in determining the number of attributes in the context of CDMs. The explored methods were parallel analysis, minimum average partial, very simple structure, DETECT, empirical Kaiser criterion, exploratory graph analysis, and a machine learning factor forest model. Additionally, a model comparison approach was considered, which consists in comparing the model-fit of empirically estimated Q-matrices. The performance of these methods was assessed by means of a comprehensive simulation study that included different generating number of attributes, item qualities, sample sizes, ratios of the number of items to attribute, correlations among the attributes, attributes thresholds, and generating CDM. Results showed that parallel analysis (with Pearson correlations and mean eigenvalue criterion), factor forest model, and model comparison (with AIC) are suitable alternatives to determine the number of attributes in CDM applications, with an overall percentage of correct estimates above 76% of the conditions. The accuracy increased to 97% when these three methods agreed on the number of attributes. In short, the present study supports the use of three methods in assessing the dimensionality of CDMs. This will allow to test the assumption of correct dimensionality present in the Q-matrix estimation and validation methods, as well as to gather evidence of validity to support the use of the scores obtained with these models. The findings of this study are illustrated using real data from an intelligence test to provide guidelines for assessing the dimensionality of CDM data in applied settings. (shrink)

The dynamics of eukaryotic DNA polymerases has been difficult to establish because of the difficulty of tracking them along the chromosomes during DNA replication. Recent work has addressed this problem in the yeasts Schizosaccharomyces pombe and Saccharomyces cerevisiae through the engineering of replicative polymerases to render them prone to incorporating ribonucleotides at high rates. Their use as tracers of the passage of each polymerase has provided a picture of unprecedented resolution of the organization of replicons and replication origins in the (...) two yeasts and has uncovered important differences between them. Additional studies have found an overlapping distribution of DNA polymorphisms and the junctions of Okazaki fragments along mononucleosomal DNA. This sequence instability is caused by the premature release of polymerase δ and the retention of non proof‐read DNA tracts replicated by polymerase α. The possible implementation of these new experimental approaches in multicellular organisms opens the door to the analysis of replication dynamics under a broad range of genetic backgrounds and physiological or pathological conditions. (shrink)

In this article Jason Brennan’s arguments about the moral duties relating to our practice of voting are examined. These arguments provide an epistocratic approach of politics and present a conception of abstention at four levels: abstention as a personal choice, as a moral responsibility, as a duty legally enforceable and as an obligation decided by lot. The contrast with John Stuart Mill’s positions helps to highlight the postdemocratic ambivalences and the latent paternalism behind Brennan’s rejection of massive voting and electoral (...) democracy. A deliberative, Millian-inspired understanding of abstention also allows questioning the assumption in Brennan’s successive proposals that there is no significant loss in overlooking the political valence of qualified abstention. (shrink)

We start from an understanding of the human person as a communicative and symbolic reality. We emphasise the more subjective aspect of education, as showing the best of the person (educere) by creatively appropriating the treasures of history (educare). With these premises, we approach narratives that are surprising for the heterodoxy (resistance) they manifest, with respect to the social reality in which they were written, in the 1st century, in which they were written. In this approach it becomes evident that (...) the interruption of the silence of women, which appears in these narratives, shows the radical value of the human personal reality, opening an egalitarian educational space. (shrink)

En los relatos de María, la madre de Jesús, encontramos un modelo de la realidad personal humana en el dinamismo de su realización como un continuo estar-dando-de-sí que muestra su desbordamiento como realidad educanda, realidad abierta. En otros relatos se muestra a mujeres como testigos del encuentro con Jesús después de su muerte, un testimonio que es recibido por el grupo de Jesús y corroborado por los varones de la comunidad para hacerlo llegar más allá de sus fronteras. En el (...) testimonio recibido y la acción compartida se muestran los cimientos de una sociedad que se construye en igualdad. (shrink)

En este artículo se discuten algunas de las propuestas planteadas en la discusión contemporánea sobre los modelos normativos para un nuevo orden internacional. En la primera parte se exponen las estrategias argumentativas del realismo político, del liberalismo de John Rawls y del modelo deliberativo..

According to the received view, Russell rediscovered about 1900 the logical definition of cardinal number given by Frege in 1884. In the same way, we are told, he stated and developed independently the idea of logicism, using the principle of abstraction as the philosophical ground. Furthermore, the role commonly ascribed in this to Peano was only to invent an appropriate notation to be used as mere instrument. In this paper I hold that the study of Russell's unpublished manuscripts and Peano's (...) (and disciples) writings (as part of a larger investigation only pointed out here) shows, on the contrary, that Russell obtained the method to transform definitions by abstraction into nominal definitions and the general logicist idea from Peano (and his school). The only original insight from Russell, the principle of abstraction, partially derived from Moore's early philosophy, was finally abandoned because it was not of practical use. (shrink)

The prestigious French publisher Presses Universitaires de France has recently brought out (November 1995) a new French edition of Elie Halévy's well known book "The Growth of Philosophical Radicalism", first published in France in three volumes as "La formation du radicalisme philosophique" (1901-1904) and translated into English in 1926. The prevailing opinion on this book is that it gives an excellent account of English utilitarianism. Thus, in the International Encyclopedia of Social Sciences, Talcott Parsons speaks of it as the ‘virtually (...) definitive analysis of utilitarianism’. More recently Donald Winch, in his introduction to the Penguin edition of John Stuart Mill's Principles of Political Economy, describes Halévy's book as: ‘Still the best study of the ideas and activities of the school taken as a whole’. In this short essay I express a very different opinion. I show that Halévy, who qualifies utilitarianism (with obvious disgust) as ‘a plebeian or rather bourgeois morality’, as ‘much too simple’, completely misunderstood the writings of the English and Scottish utilitarian philosophers. (shrink)

Para el transhumanismo, la humanidad es una etapa que, guiada por la evolución biológica, estuvo precedida por otras anteriores y a la que seguirán otras nuevas. Según el transhumanismo hemos de romper la inercia de causas ciegas que gobierna la evolución y, a través de la biotecnología, alcanzar lo que denominan una “vida mejor”. Los autores afines a esta corriente desarrollan sus propuestas negando la existencia de una naturaleza humana, pero sin abandonar la convicción de que resulta posible definir en (...) qué consiste una “vida mejor”. En este artículo analizamos la claridad y el rigor con la que presentan el fin último de su propuesta, la relación entre el fin y los medios planteados para alcanzarlo, y, finalmente, pondremos de manifiesto algunas inconsistencias derivadas de su rechazo de que la naturaleza humana pueda tener valor normativo. (shrink)

La teología de Ilia Delio se acerca valientemente hasta las últimas fronteras de la ciencia y la tecnología en nuestro mundo del siglo XXI. Estas fronteras incluyen de modo especial a la mecánica cuántica y al cíborg, y muy cerca de ellas también a la inteligencia artificial y al transhumanismo. Ella insiste en la necesidad de superar lo que denomina el complejo helénico, el marco de comprensión de una metafísica y una cosmología pertenecientes a otra época que no pueden ya (...) por más tiempo servir a la transmisión de la fe. Delio se define a sí misma como una cristiana cíborg y trabaja en una teología nueva para un tiempo nuevo, aunque algunas de sus conclusiones puedan ser rechazadas, su impulso es importante para desarrollar una teología que realmente sea significativa en nuestro mundo. (shrink)

Plato’s Symposium: Issues in Interpretation and Reception, eds. James Lesher, Debra Nails, and Frisbee Sheffield ; Frisbee C. C. Sheffield, Plato’s Symposium: The Ethics of Desire ; Kevin Corrigan and Elena Glazov-Corrigan, Plato’s Dialectic at Play: Structure, Argument and Myth in Plato’s Symposium.

45~ JOURNAL OF THE HISTORY OF PHILOSOPHY 34:3 JULY 1996 text" , and an element of "oralism" remains in all of Plato's written works. Nonetheless, Robb's "speculations" on the Platonic dialogues are certainly worth reading. Robb is quite aware that his book stirs up controversial issues, and some of these are briefly stated and discussed in his concluding chapter, "Homer, the Alphabet, and the Progress of Greek Literacy and Paideia." And yet in the very notions of "literacy" and "progress," some (...) weaknesses in Robb's work can be found. For example, as W. V. Harris observed in his Ancient Literacy , 3ft., there is no single definition of literacy or orality, and although Robb cites Harris's book , he takes no special account of it in attempting to define or characterize what he means by "orality" and "literacy." And in his zeal to provide a survey of the influence of alphabetic literacy on Plato, Robb perhaps oversimplifies the tension that existed between the spoken and written work in the ancient world. Much of Greek "literature" remains the product of literate, slave- owning, and well-educated authors, written for their peers. Robb suggests as much in his discussion of mousild and sunousia , and one might desire a "sociology" of ancient Athens, for example, in which economic status and.. (shrink)

The question addressed here is how Aristotle can characterize the ‘unmoved mover’ that is the ‘first ousia’ and first principle of his metaphysics not only as being alive, but as a model for the best kind of human life. The first step towards understanding this characterization is the distinction between ‘motion’ and ‘activity’ that Aristotle develops in 6th chapter of Metaphysics. Only on the basis of this distinction can we understand how the unmoved mover can be active without being in (...) motion. The second is the argument in De Anima that the soul as principle of life is not any kind of motion, being unmoved even by itself. The soul indeed ‘moves’ in the sense of causing motion, but while remaining itself unmoved. On this basis we see that the meaning of ‘life’ in us is not fundamentally different from its meaning in the divine, and that therefore we can indeed find in the ultimate object of metaphysics a model for how we ourselves are to live. (shrink)

El presente trabajo pretende demostrar que la categoría despotismo analizada por Tocqueville afecta principalmente a la subjetividad y no a la lógica social de la democracia moderna. Para demostrar esta premisa, se explora la influencia de la filosofía política aristotélica en la psicología moral del autor francés, para mostrar que los atributos empíricos de esta conexión permiten constatar una concepción «asentida» de despotismo que condiciona el comportamiento, en detrimento de interpretaciones que abogan por una exclusiva congruencia estructural de sus efectos.