This book explains how the logic of theory change employs formal models in the investigation of changes in belief states and databases. The topics covered include equivalent characterizations of AGM operations, extended representations of the belief states, change operators not included in the original framework, iterated change, applications of the model, its connections with other formal frameworks, and criticism of the model.

We introduce a constructive model of selective belief revision in which it is possible to accept only a part of the input information. A selective revision operator ο is defined by the equality K ο α = K * f(α), where * is an AGM revision operator and f a function, typically with the property ⊢ α → f(α). Axiomatic characterizations are provided for three variants of selective revision.

This paper focuses on the extension of AGM that allows change for a belief base by a set of sentences instead of a single sentence. In [FH94], Fuhrmann and Hansson presented an axiomatic for Multiple Contraction and a construction based on the AGM Partial Meet Contraction. We propose for their model another way to construct functions: Multiple Kernel Contraction, that is a modification of Kernel Contraction, proposed by Hansson [Han94] to construct classical AGM contractions and belief base contractions. This construction (...) works out the unsolved problem pointed out by Hansson in [Han99, pp. 369]. (shrink)

The paper presents Amartya Sen’s critique of the anthropological model that underlies the conception of neoclassical economics, in order to present the conception of subject offered by the abilities approach and then the notion of development as freedom.

This paper defends the Quine-Putnam mathematical indispensability argument against two objections raised by Penelope Maddy. The objections concern scientific practices regarding the development of the atomic theory and the role of applied mathematics in the continuum and infinity. I present two alternative accounts by Stephen Brush and Alan Chalmers on the atomic theory. I argue that these two theories are consistent with Quine’s theory of scientific confirmation. I advance some novel versions of the indispensability argument. I argue that these new (...) versions accommodate Maddy’s history of the atomic theory. Counter-examples are provided regarding the role of the mathematical continuum and mathematical infinity in science. (shrink)

La instancia filosófica del cominciamento hace referencia a aquel paso absolutamente primero del pensamiento, que es presupuesto y fundamento de todo contenido, modo y acto ulterior del propio pensar. En la modernidad, la instancia del inicio es reivindicada por Hegel, quien, al igual que Tomás de Aquino en el medioevo, concibe el “ser” como punto de partida del pensamiento. A pesar de esta convergencia entre ambos autores, presentan una profunda divergencia especulativa. Tanto la convergencia como la divergencia mencionadas serán examinadas (...) en este trabajo, siguiendo las investigaciones del filósofo italiano Cornelio Fabro. (shrink)

In this paper, I start by describing and examining the main results about the option of formalizing the Yablo Paradox in arithmetic. As it is known, although it is natural to assume that there is a right representation of that paradox in first order arithmetic, there are some technical results that give rise to doubts about this possibility. Then, I present some arguments that have challenged that Yablo’s construction is non-circular. Just like that, Priest (1997) has argued that such formalization (...) shows that Yablo’s Paradox involves implicit circularity. In the same direction, Beall (2001) has introduced epistemic factors in this discussion. Even more, Priest has also argued that the introduction of infinitary reasoning would be of little help. Finally, one could reject definitions of circularity in term of fixed-point adopting non-well-founded set theory. Then, one could hold that the Yablo paradox and the Liar paradox share the same non-well-founded structure. So, if the latter is circular, the first is too. In all such cases, I survey Cook’s approach (2006, forthcoming) on those arguments for the charge of circularity. In the end, I present my position and summarize the discussion involved in this volume. En este artículo, describo y examino los principales resultados vinculados a la formalización de la paradoja de Yablo en la aritmética. Aunque es natural suponer que hay una representación correcta de la paradoja en la aritmética de primer orden, hay algunos resultados técnicos que hacen surgir dudas acerca de esta posibilidad. Más aún, presento algunos argumentos que han cuestionado que la construcción de Yablo no sea circular. Así, Priest (1997) ha argumentado que la formalización de la paradoja de Yablo en la aritmética de primer orden muestra que la misma involucra implícitamente circularidad. En la misma dirección, Beall (2001) ha introducido factores epistémicos en esta discusión. Más aún, Priest ha también argumentado que la introducción de razonamiento infinitario como complemento de la formalización en la aritmética sería de poca ayuda. Finalmente, se podría rechazar todo intento de dar definiciones de circularidad en términos de puntos fijos adoptando teoría de conjuntos infundados. Entonces, se podría sostener que la paradoja de Yablo y la del mentiroso comparten la misma estructura infundada. Por eso, si la última es circular, también lo es la primera. En todos los casos, presento el enfoque de Roy Cook (2006, en prensa) sobre estos argumentos que atribuyen circularidad a la construcción de Yablo. En el final, presento mi posición y un breve resumen de la discusión involucrada en este volumen. (shrink)

In this article we present a new class of multiple contraction functionswhich are a generalization of the epistemic entrenchment-based contractions (Grdenfors & Makinson, 1988) to the case of contractions by (possibly nonsingleton) sets of sentences and provide an axiomatic characterization for that class of functions. Moreover, we show that the class of epistemic entrenchment-based multiple contractions coincides with the class of system of spheres-based multiple contractions introduced in Fermé & Reis (2012).

Peirce’s analyses of the concept of information begin in the period from 1865 to 1869 and continue until the last years of his life. In fact, the successive phases that the scholars distinguish about Peirce’s approaches to information, roughly match Fisch’s periodization of Peirce’s philosophical development. In the first phase his approach is restricted to the proposition and the terms that knock it into shape; the forms of inference prevail. In the second phase the concept of information is enriched with (...) the development of Peirce’s semiotic theory and his typology of signs. By last, his concept of information receives a more decidedly metaphysical stamp. In this paper we will just expose Peirce’s conception of information during the first of these phases, foregrounding his papers Upon Logical Comprehension and Extension (W2 [1867]: 70-86) and Questions on Reality (W2 [1868]: 162-87). Here, individuals explore and actualize possibilities in thought, once they articulate their experience through a social system of signs. That’s why, in inferring, “we ought to say that we are in thought, and not that thoughts are in us” (EP 1 [1868]: 42). (shrink)

El siguiente trabajo tiene como objetivo principal describir y analizar la percepción de Manuel Baldomero Ugarte sobre Estados Unidos. Ugarte fue literato y político, pero también fue un pensador interesado por los asuntos internacionales de América Latina. Evidencia de ello son sus propuestas integracionistas y antiimperialistas, en las cuales la presencia de Estados Unidos era evidente. Debido a lo anterior, se estima conveniente explicar qué pensó Ugarte sobre la nación norteamericana, y desde esa perspectiva, contribuir a la discusión sobre tan (...) trascendental intelectual latinoamericano. The purpose of this work is to describe and analyze the perception of Manuel Baldomero Ugarte about the United States. Ugarte was a writer and a politician, but it was also a thinker interested in the Latin America’s international affairs. Testimony of this are his integrationist and anti-imperialist proposals, in which the U.S. presence was evident. Thus, it is considered advisable to explain what he thought about the American nation, and from this perspective, to contribute to the discussion around this important Latin American intellectual. (shrink)

Based on a theoretical approach to current problems of democracy, the amplification of the public citizen action sphere, and changes generated by the transitions in democratic systems, the Venezuelan political process is analyzed since the rise to power of Hugo Chávez in 1998. The Chavez pheno..

The ancient one-to-one relationship with the biological life cycle has gradually deteriorated due to the world undergoing a metamorphic process. Such a metamorphosis has affected ecological harmony, in terms of it being both an approach to studying the relationships between living beings and the environment, and a branch of knowledge protecting and promoting ecological balance. One of the crucial aspects of this phenomenon is the need to rethink and redefine the concept of life in an era that has been described (...) as the “Anthropocene”. In introducing this special issue of the Journal, the paper aims to investigate the environmental question, which plays a crucial role in contemporary political thought, due to the survival of both nature and mankind being threatened. Since the 1950s, such a complex situation has resulted in two lines of thought whose views follow two opposed ideologies – anthropocentrism and anti-anthropocentrism. (shrink)

Este artigo interpreta a posição política e intelectual de Luiz Gama frente aos movimentos em defesa do fim da escravidão. Analisa suas narrativas e escritos publicados no jornal Radical Paulistano na segunda metade do século XIX, com destaque para o seu papel diferenciado no interior do Clube Radical. Por fim, concluímos que a participação ativa de Luiz Gama no interior do movimento liberal contribuiu para dar forma as ações desse movimento social.

El contenido de la presente discusión de Análisis Filosófico surge a partir de diversas actividades organizadas por mí en SADAF y en la UBA. En primer lugar, Roy Cook dictó en SADAF el seminario de investigación intensivo On Yablo's Paradox durante la última semana de julio de 2011. En el seminario, el profesor Cook presentó el manuscrito aún sin finalizar de su libro The Yablo Paradox: An Essay on Circularity, Oxford, Oxford UP, (en prensa). Extensas y apasionantes discusiones ocurrieron durante (...) esos encuentros sobre circularidad y construcciones infinitarias. Fue en ese tiempo, donde me surgió la idea de editar una discusión sobre las ideas que Cook defiende en ese trabajo. El proyecto era una extensión natural del trabajo que veníamos realizando con mi grupo de investigación en temas vinculados al concepto de verdad, autorreferencia y paradojas. Luego, durante el segundo cuatrimestre de 2011, dicté el seminario La paradoja de Yablo, en el instituto de filosofía de la UBA. Algunos de los borradores de los artículos que aparecen en el presente volumen tienen su origen en este curso. Finalmente, invité por segunda vez al profesor Cook al Symposium on Yablo's Paradox realizado en SADAF en julio de 2012. En esta oportunidad, se presentaron las versiones finales de los artículos de Lavinia Picollo, Paula Teijeiro, Federico Pailos, Diego Tajer, Lucas Rosenblatt e Ignacio Ojea que se incluyen a continuación. El encuentro incluyó las inteligentes réplicas del profesor Cook y profundas discusiones sobre los mencionados temas lógicosemánticos. Quiero agradecer a todos los integrantes del Gaf[log] que participaron activamente en las mencionadas actividades, ya sea en la publicación posterior o en los coloquios y seminarios que le dieron origen. Agradezco al Comité editorial de Análisis Filosófico, en especial a Alberto Moretti, quienes apoyaron desde sus comienzos este proyecto. Finalmente, y de manera especial, quiero expresar mi gratitud al profesor Roy Cook, quien no sólo apoyó e inspiró el proyecto desde sus comienzos, sino que además compartió generosamente sus ideas y las discutió con estimulante pasión. (shrink)

Jelson Roberto de Oliveira, autor de “Compreender Hans Jonas”, é graduado em Filosofia pela Universidade Federal do Paraná, com especialização em Sociologia Política e mestrado em História da Filosofia Moderna e Contemporânea pela mesma universidade. Atualmente é professor da pós-graduação em Filosofia na PUC-PR, e coordenador do GT Hans Jonas, da Anpof, que reúne vários pesquisadores de nível nacional na área. Ética para a civilização tecnológica e A solidão como virtude moral em Nietzsche são alguns dos diversos títulos que compõem (...) o acervo de obras do autor. (shrink)

Wittgenstein analisa em sua obra tardia, a relação entre regra e sua aplicação. Neste contexto, emerge o tema sobre compreensão de regras. O autor possui uma concepção distinta da tradição no que se refere à compreensão de algo (seja uma palavra, seja uma regra). Compreender uma regra não é um fenômeno mental, mas um ato natural, uma habilidade dominada pelo treino e aplicação de uma técnica cujo critério é o comportamento público dos agentes. Em algumas partes, surge a discussão sobre (...) uma possível lacuna entre regra e aplicação que abriu margem para interpretações equivocadas. Contudo, Wittgenstein apenas considera esta lacuna para fins de investigação, e concluí que a lacuna seria improcedente. Este artigo visa analisar o debate wittgensteiniano por meio de evidências textuais com citações selecionadas da obra tardia do autor. Defendo que Wittgenstein possui uma postura naturalista e pragmatista com relação à aplicação e compreensão de regras e que, a lacuna entre regra e compreensão é aparente e ocorreria caso se adotasse um modelo mentalista de compressão da linguagem. (shrink)

This book casts new light on the application of the principle of proportionality in international law. Proportionality is claimed to play a central role governing the exercise of public power in international law and has been presented as the 'ultimate rule of law'.

The ontological question goes way back to Plato. In his Teetetus he already searched for the answer to question of “how is it possible that when a man stares at something he would not see anything anyway”. Quine is the author of a doctrine on ontology, “On what there is”. His work follows the path of medieval authors such as William of Ockham, who proposed the methodology that came to be known as Okcham's razor. The excessive proliferation of entities is (...) known as “Plato's beard”. Quine, among others, has shaved Plato's beard searching for logical and scientific simplicity. (shrink)

This essay addresses the question of the problem of method in John Rawls' theory, that is, the justification of this theory of justice as fairness. Three possible answers have been considered: the contract argument, the reflective equilibrium and the constructivism. What has not been considered, however, are their relations to one another. Are they, perhaps, contradictory methodological strategies? Is it possible to talk of a 'circle of demostration', as P. Ricoeur does? This paper outlines an answer to these questions, focussing (...) upon the decisive tole played by the contract argument. (shrink)

Tencionamos com este breve escrito abordar a questão acerca da relação do sujeito com o mundo no âmbito da ordem moral segundo a concepção que dela faz Santo Agostinho, o Mestre do Ocidente. Este tema esteve presente durante toda a carreira do bispo de Hipona assumindo formas diversas e adquirindo nuanças distintivas de acordo com as polêmicas em que se envolvia Agostinho na defesa da fé cristã; porém, acreditamos que a concepção de frui aut uti – segundo a formula latina: (...) uso e fruição – perpassa basicamente toda a sua produção teóricoliterária, e, se inscreve na construção agostiniana de uma ordem moral, ética cristã, ordem que abarca todas as relações, transpessoais, interpessoais, e, por fim, subpessoais, noutras palavras, esta ordem envolve todas as relações possíveis ao homem, segundo o Bispo de Hipona, a relação entre o homem e Deus, entre homem e seus semelhantes e entre o homem e as demais criaturas. Para a consecução deste projeto efetuaremos uma análise exegética de De Doctrina Christiana (I. 20,22), buscando subsídios noutros escritos de Agostinho, sobretudo Confessione e De Civitate Dei através dos quais pretendemos legitimar através do itinerário deste escrito a atualidade da tese agostiniana tendo em vista os graves distúrbios na ordem das relações facilmente detectáveis na Modernidade. Embora saibamos a grandeza das dificuldades implícitas em semelhante proposta e nas discussões dela decorrentes. (shrink)

Popper's thesis that the growth of knowledge lies in the emergence of problems out of criticism and takes place in an autonomous world of products of the human mind (his so-called world-3) raises two questions: (1) Why does criticism lead to new problems, and (2) Why can only a limited number of tentative solutions arise at a given time? I propose the following answer: Criticism entails an overlooked evolutionary world-3 mechanism, namely, the migration of piece meal conceptual schemes from one (...) research tradition to another. Popper by passed the questions above because he relied very heavily on the selective power of criticism. (shrink)

The author argues that the pragmatically oriented historiography of science that recently has been so strongly recommended has fallen into the mistake of focusing on scientists' circumstantial attempts to fix beliefs without discussing the scientific importance of the beliefs in the first place. This mistake has led historians of science to engage in pointless exercises, made them mute about crucial aspects of the development of science, and, above all, prevented them from avoiding, in a satisfactory way, the ghost of "triumphalism." (...) On the other hand, so-called traditional historiography of science is not vulnerable to any of these charges. Key Words: history of science • sociology of science • scientific revolution • SSK. (shrink)

In this paper, I discuss how the principle of identifying knowledge which Strawson advances in ‘Singular Terms and Predication’ (1961), and in ‘Identifying Reference and Truth-Values’ (1964) turns out to constrain communication. The principle states that a speaker’s use of a referring expression should invoke identifying knowledge on the part of the hearer, if the hearer is to understand what the speaker is saying, and also that, in so referring, speakers are attentive to hearers’ epistemic states. In contrasting it with (...) Russell’s Principle (Evans 1982), as well as with the principle of identifying descriptions (Donnellan 1970), I try to show that the principle of identifying knowledge, ultimately a condition for understanding, makes sense only in a situation of conversation. This allows me to conclude that the cooperative feature of communication (Grice 1975) and reference (Clark andWilkes-Gibbs 1986) holds also at the understanding level. Finally, I discuss where Strawson’s views seem to be unsatisfactory, and suggest how they might be improved. (shrink)

el artículo presenta algunos de los conceptos clave de las teorías de la democracia deliberativa y la política discursiva, de Habermas, y de la política de la liberación, de Dussel, con el fin de establecer coincidencias y divergencias en vista de una interpretación actual de la democracia y de lo político.

McTaggart se apoya en el hecho de que no percibimos el tiempo en si mismo, un tiempo vacio de sucesos: lo que en verdad percibimos es el transcurrir de los acontecimientos, tanto de los extemos como los de nuestro propio estado intemo en la conciencia. Todo el desarrollo de McTaggart y tambien su originalidad, consiste en el desentraiiamiento del mecanismo por el cual aprehendemos el caracter temporal del acaecer, a traves del cual tenemos la ilusión de que percibimos el tiempo. (...) De ese analisis se desprende su tesis: La manera de captar lo temporal es contradictoria en si misma, par lo que, si el significante es contradictorio, lo significado, en este caso el tiempo, es nada: el nihil privativum kantiano" Pregunto: no tendra razón McTaggart, en cuyo caso podria decirse que los sucesos "son" el tiempo? (shrink)

La presente edición de la revista Polis tiene como tema central la(s) ciencia(s), la(s) tecnología(s) y la producción colectiva de saber(es). El desarrollo científico en nuestros países, llegados tardíamente a la revolución industrial, de frustrada y asimétrica industrialización, es claramente insuficiente y aún no han logrado incorporarse a la nueva revolución científico-tecnológica. Simultáneamente, nuestras sociedades se encuentran en un proceso de profundas transformaciones en su sistema..