O artigo argumenta em favor da atualidade da ética husserliana a partir de três eixos temáticos, que se complementam: a relaçáo entre razáo teórica e razáo prática no interior da fenomenologia, o conceito de humanidade autêntica e, finalmente, a reflexáo fenomenológica sobre a esfera do estrangeiro. Parte-se do pressuposto segundo o qual o pensamento de Husserl abre caminho para uma superaçáo de duas atitudes éticas radicais: o ceticismo de caráter biológico e o universalismo abstrato.

Refletimos sobre a violência que frequenta as instituições escolares partindo do pressuposto de que ao se apresentar na escola de maneira molecular, a violência evidencia o reflexo do que já se encontra posto na sociedade. No que se refere à escola, é necessário pensar o fenômeno violento como uma realidade que cada dia mais toma o cenário escolar e demanda de educadores, alunos e famílias respostas novas e inventivas aos problemas advindos da complexa relação a que a violência os expõem. (...) Tendo vista uma compreensão mais detalhada do fenômeno, realizamos uma análise da violência que adentra os muros da escola, servindo-nos de uma classificação muito utilizada entre os teóricos pesquisadores do assunto: a violência da, na e contra a escola. Estudando separadamente cada uma destas formas de violência, acreditamos poder abarcar, ainda que não tão profundamente quanto o tema exige, as formas com que a violência tem sido vivenciada na escola por seus sujeitos discentes e docentes e por toda a comunidade em que ela se insere. Refletir sobre o fenômeno violento e suas implicações, abrindo espaços de fala dentro das instituições escolares para que ele seja discutido e problematizado, pensamos ser um dos possíveis caminhos para superação da violência. (shrink)

Este artículo es una respuesta a la crítica de Noé Expósito Ropero —que se basa en gran medida en la visión de Javier San Martín— a mi interpretación de la filosofía de José Ortega y Gasset. El resultado del argumento de Expósito Ropero es que Ortega es más fenomenólogo de lo que yo considero, que me equivoco al pen-sar que existen los “objetos reales” más allá de los objetos intencionales de Edmund Husserl, y que ningún objeto inanimado puede ser tratado (...) como un “yo”. Como réplica, respondo a cada una de estas acusaciones.This article is a response to Noé Expósito Ropero’s critique—which draws heavily on the views of Javier San Martín—of my interpretation of the philosophy of José Ortega y Gasset. The upshot of Expósito Ropero’s argument is that Ortega is more of a phenomenologist than I realize, that I am wrong to think there is any such thing as “real objects” beyond Edmund Husserl’s intentional objects, and that no inanimate object can be treated as an “I.” In response, I answer each of these charges. (shrink)

Although the controversy between Malthus and Ricardo has long been considered to be an important source for the history of economic thought, it has hardly been the object of a careful study qua controversy, i.e. as a polemical dialogical exchange. We have undertaken to fill this gap, within the framework of a more ambitious project that places controversies at the center of an account of the history of ideas, in science and elsewhere. It is our contention that the dialogical co-text (...) is essential for reconstructing the meaning and the evolution of science. In the present paper we try to substantiate this contention by means of a pragma-rhetorical study of this particular controversy. First, we reconstruct, through an analysis of a chunk of the correspondence, a micro-level of specific moves and countermoves which constitute a sequential structure within which also meta-scientific and meta-controversial considerations play a role. We then move to a macro-level of analysis, looking for recurrent patterns of argumentation. Finally, we draw epistemological conclusions on the nature of rationality and progress as manifested in actual scientific controversies. (shrink)

This paper analyzes, from the opposition of the Cartesian notion of the mechanics of light and the idea of vision as distance possession developed by Merleau-Ponty, the criticism of philosophical modernity and its general paradigms of the centrality of reason. It is, strictly speaking, two distinct conceptions of sensitivity: one associated with mechanics, the other with existence. According to Merleau-Ponty, light as a movement of particles and corpuscles does not account for vision as the subject's installation in a mundane situation. (...) More than that, the contemporary conception of vision allows, among other things, to deal with the problem of the substantial union of body and soul, overcoming the impasses that even modern philosophy has not been able to answer. (shrink)

This paper defends that the both the Buddhist tradition and the Aristotelian allow us to think of the distinction between to reason with contradictions and to accept them, understanding ' accept a contradiction ' by taking it as consistent. From this viewpoint, none of two would disagree with most contemporary paraconsistent views. The conclusions are, thus, that, firstly, there is no compelling reason to endorse any kind of metaphysical dialetheism, and, second, that a coherent form of reasoning with contradictory statements (...) is neither opposed to the Aristotelian conception of logic, nor to certain texts in the Buddhist tradition, as the Madhyamikas. (shrink)

Given the abrupt global disruption caused by SARS-CoV-2, one might think that the COVID pandemic was an unpredictable event. But in the years leading up to the emergence of the COVID pandemic, several documents had already been warning of the increasing occurrences of new disease outbreaks with pandemic potential and lack of corresponding policies to promote pandemic preparedness and response. In this article, we call these documents “early warnings”. We argue that a survey of early warnings can help science communicators (...) to promote the public understanding of evidence-based pandemic preparedness and response policies at local or international level. Our proposal differs from other approaches to pandemic preparedness and response in that it highlights the relevance of documents published before the COVID outbreak. We show that the early warnings did not become outdated after the COVID outbreak, but, rather, that they are even more pressing now. (shrink)

La homonimia de ‘vida’, que conduce a un conjunto de dificultades lógicas, epistemológicas y ontológicas, es tratada sistemáticamente por Aristóteles en DA, II, 2-3, donde el filósofo emplea la noción de unidad por sucesión (toi ephexes) como criterio lógico-semántico, ontológicamente anclado. Este criterio permite salvar cierta unidad del término y evitar una representación inadecuada de las distintas clases de vida y de la relación entre ellas. El planteo es relevante para una comprensión no-reductiva de la vida nutritiva en animales y (...) personas, cuya consideración de detalle vuelve discutible el énfasis de la interpretación de Agamben de la noción aristotélica de vida nutritiva como base histórica y sistemática de la biopolítica. (shrink)

Qual é o lugar da escrita no ensino da filosofia no Ensino Médio? Trata-se de uma reflexão sobre a escrita filosófica, viabilizada pela leitura de quem intenciona a escrita e não pela leitura para saber, isto é, para acumular ou reproduzir conhecimento. O que se constata, é que a escrita é uma das atividades essenciais do filosofar e possui caráter formador que precisa ser valorizado. Raros são os pensadores que não escreveram e, além do mais, vive-se num contexto em que (...) ela, num sentido geral, é onipresente. A escrita filosófica, no nível da formação média, pode ser um contraponto às várias modalidades de produções disponíveis, caracterizadas pela velocidade e superficialidade. Sua consistência, tempo e modo de elaboração servem como resistência ao descartável. Sua finalidade é produzir sentido, nesse jogo de linguagem que é a filosofia. (shrink)

Society Semantics, introduced by W. Carnielli and M. Lima-Marques, is a method for obtaining new logics from the combination of agents of a given logic. The goal of this paper is to present several generalizations of this method, as well as to show some applications to many-valued logics. After a reformulation of Society Semantics in a wider setting, we develop in detail two examples of application of the new formalism, characterizing a hierarchy of paraconsistent logics called Pn and a hierarchy (...) of paracomplete logics In. We also propose three further generalizations, obtaining Society Semantics for several many-valued logics, including a hierarchy of logics called In Pk which are both paraconsistent and paracomplete. (shrink)

Este artículo tiene como objetivo explorar y dilucidar las distinciones fundamentales entre la inteligencia artificial (IA) y la inteligencia sentiente, tal como se propone en la filosofía de Xavier Zubiri. El estudio busca comprender hasta qué punto la IA puede replicar aspectos de la inteligencia humana y cómo la comprensión de la inteligencia sentiente puede informar e influenciar el desarrollo futuro de la IA. La investigación adoptó un enfoque cualitativo, utilizando una investigación bibliográfica para construir un marco teórico sólido sobre (...) la IA y la inteligencia sentiente. Además, se realizó un análisis de contenido para comparar la inteligencia artificial con la inteligencia sentiente, con un enfoque en la filosofía de Xavier Zubiri, que permitió identificar dos categorías principales relacionadas con la IA desde la perspectiva de la inteligencia sentiente: características ausentes y presentes de la IA según la comprensión de la inteligencia sentiente. Dentro de las características ausentes, se encontraron 14 unidades de registros; para las características presentes, 7 unidades de registro, con un total de 21 códigos. El estudio concluye que, aunque la inteligencia artificial puede imitar ciertos aspectos de la inteligencia humana, no puede replicar la totalidad de la experiencia sentiente. (shrink)

The possibility of morally enhancing the behavior of individuals by means of drugs and genetic engineering has been the object of intense philosophical discussion over the last few years. However; although moral enhancement may turn out to be useful to promote cooperation in some areas of human interaction; it will not promote cooperation in the domain of international relations in those areas that are critical to state security. Unlike some moral enhancement theorists; I argue that; because of the structure of (...) the system of states; moral enhancement cannot be used to avert such major threats to humankind as terrorism and nuclear conflict. My analysis of the political implications of moral enhancement is pursued through a critical discussion of two different versions of political realism; namely human nature realism and structural realism. I conclude that; as far as major threats to the survival of humankind are concerned; moral enhancement can at most be used as a means to change the present structure of the system of states. (shrink)

In this paper, I wish to present and defend the thesis that the impasse at which the philosophy and history of science find themselves in the last couple of decades is due, to a large extent, either to the complete neglect or to a misguided treatment of t he role of scientific controversies in the evolution of science.

Resumo: O objetivo deste artigo é elucidar o conceito de disposições morais a partir de uma perspectiva contratualista. Tenho especialmente em vista o tipo de teoria moral defendida por David Gauthier. Minha intenção é mostrar que a tese segundo a qual, por interesse próprio, seria racional para um indivíduo "escolher" se tornar uma pessoa movida por um senso de justiça deve ser compreendida em termos da racionalidade de uma escolha pela criação e pelo fomento às instituições que estão na origem (...) da formação de nossas disposições morais.Palavras-chave: Contratualismo - Disposições Morais - Justiça - Pessoa.: This paper aims at clarifying the concept of moral dispositions from a contractarian perspective. I have in mind the kind of moral theory advanced by David Gauthier. My intention is to show that the thesis according to which it would be rational, for the sake of self-interest, to "choose" being moved by a sense of justice must be construed in terms of the rationality of a choice for the creation and support of the institutions which are at the root of our moral dispositions. (shrink)

Este artículo examina la preconcepción epicúrea y diversos problemas relacionados con su adquisición y función, tanto en el ámbito teórico como en el práctico. Los autores ponen de relieve que en el modelo contractual epicúreo la justicia constituye una modalidad de lo útil y la preconcepción de lo justo opera como un canon para validar las leyes en las comunidades políticas. Examinan asimismo el vínculo entre el lenguaje y la justicia en el epicureísmo, centrándose primero en el papel del lenguaje (...) en la genealogía epicúrea de la justicia y, luego, en las conexiones entre el aprendizaje del lenguaje y la prolepsis de lo justo en las comunidades políticas constituidas. Subrayan, para concluir, que el aprendizaje del lenguaje es un ingrediente relevante de la experiencia para comprender la génesis empírica de la preconcepción epicúrea. (shrink)

We focus on the debate on the external validity of lab results in the area of experimental economics. More specifically, we focus on Colin Camerer’s and John List’s views, who postulate opposite positions on the issue. The problem is that they partially analyze the same empirical evidence and draw from it opposite conclusions. The goal of this work is to analyze such empirical evidence to try to explain the difference in interpretation of results. We argue that the dispute in interpretations (...) can be expressed in terms of difference of criteria used to determine external validity. From our analysis we propose the formulation of different types of external validity. (shrink)

In recent years, counterfeiting has grown exponentially and has now become a grave economic problem. The acquisition of counterfeits poses an ethical dilemma as it benefits the buyer and illegal seller at the cost of the legitimate producer and with fewer taxes being paid throughout the supply chain. Previous research reveals inconsistent and sometimes inconclusive findings regarding whether materialism is associated, positively or negatively, with intentions to purchase counterfeits. The current research seeks to resolve these inconsistencies by investigating previously ignored (...) interactions between three variables: risk of embarrassment, counterfeit detectability and product conspicuousness. First, risk of embarrassment mediates the relationship between materialism and counterfeit purchase intentions. Specifically, materialism negatively predicts counterfeit purchase intentions as mediated by risk of embarrassment. Second, this relationship only holds when the counterfeit can be easily detected. When it is not easily detected, materialism instead leads to positive purchase intentions. Third, these positive effects can be offset when the product is not highly visible. This research has important implications for marketers, manufacturers and academics and contributes to better understanding the antecedents of counterfeit purchases. (shrink)

After a brief promenade on the several notions of translations that appear in the literature, we concentrate on three paradigms of translations between logics: ( conservative ) translations , transfers and contextual translations . Though independent, such approaches are here compared and assessed against questions about the meaning of a translation and about comparative strength and extensibility of a logic with respect to another.

No interior do pensamento de Dewey, a gênese da estética merece mais atenção do que lhe é dada na literatura. Um aspecto, em especial, tem sido virtualmente negligenciado — com as notáveis exceções de Robins 2015, Ueno 2016, Hein 2017 e Granger 2018a e 2018b — a saber, os vínculos com Albert Coombs Barnes. Nossa hipótese é que Barnes desempenhou um papel relevante na “virada estética” da filosofia madura de Dewey. Neste artigo, nós tomamos um primeiro passo rumo ao esclarecimento (...) da relação entre eles e uma tentativa de mostrar a influência do colecionador de arte na obra do filósofo. (shrink)

In this paper two systems of AGM-like Paraconsistent Belief Revision are overviewed, both defined over Logics of Formal Inconsistency (LFIs) due to the possibility of defining a formal consistency operator within these logics. The AGM° system is strongly based on this operator and internalize the notion of formal consistency in the explicit constructions and postulates. Alternatively, the AGMp system uses the AGM-compliance of LFIs and thus assumes a wider notion of paraconsistency - not necessarily related to the notion of formal (...) consistency. (shrink)

Este artículo fue publicado originalmente como Jean Héring. De Max Scheler à Hans Reiner. Remarques sur la théorie des valeurs morales dans le mouvement phénoménologique. Revue d'histoire et de philosophie religieuses, 40, 152-164. Agradecemos a Matthieu Arnold, directeur Revue d'histoire et de philosophie religieuses, por la autorización para la publicación de esta traducción. La presente traducción toma como fuente original francesa citada en el párrafo anterior. Las notas del traductor se introducen con un *. Las notas del autor —Jean Héring— (...) siguen el orden de numeración del texto original en numeración arábica. Un agradecimiento especial a Paloma Vicente por las correcciones y sugerencias de traducción. (shrink)

Este ensaio analisa as objeções elaboradas por Merleau-Ponty ao que ele chama de “paradigma cartesiano de pensamento”, ou seja, a separação entre alma e corpo. Concentrando-nos nos dois primeiros capítulos da primeira parte da Fenomenologia da Percepção, trata-se de identificar, nas críticas dirigidas à fisiologia mecanicista e à psicologia subjetiva, como o filósofo delega ao corpo sensível um novo estatuto filosófico, colocando-o como principal veículo da existência, ao mesmo tempo em que redescobre a experiência pré-objetiva.

In the cladistic literature, there is a recurrent perspective that considers homoplasy as something undesirable. Homoplasy, according to this view, is believed to obscure homologies that may lead to synapomorphies. Some cladists often call homoplasies an ad hoc hypothesis or an “error in our preliminary assignment of homology.” Consequently, homoplasy is generally regarded negatively, hindering further investigations, because it matters little whether a character subject to homoplasy is a convergence, a parallelism, or a reversal, since they all fall within the (...) problematic homoplastic category. Nixon and Carpenter developed one of the recent arguments supporting this vision. In this context, I will argue that phylogenetics, being a part of evolutionary biology, must be compatible with its principles. Therefore, I will discuss the idea that homoplasy is more complex than just nonhomology, sometimes even constituting evidence of common ancestry (e.g., parallelism). I will put forward the thesis that it is crucial to differentiate instances of convergence, parallelism, and reversions by incorporating recent advances from EvoDevo research. Ultimately, this approach aims to demonstrate that evolutionary biology and phylogenetics mutually complement each other and assist in providing different lines of evidence that can be used to test different evolutionary hypotheses. (shrink)

Qual é a relação entre uma razão e uma ação quando a razão explica a ação, dando a razão do agente para fazer o que fez? Podemos chamar tais explicações de racionalizações, e dizer que a razão racionaliza a ação. Neste artigo quero defender a posição antiga — e de senso comum — de que a racionalização é uma espécie de explicação causal b. A defesa sem dúvida exige alguma reelaboração, mas não parece necessário abandonar a posição, como muitos autores (...) recentes insistem. (shrink)

There are two foundational, but not fully developed, ideas in paraconsistency, namely, the duality between paraconsistent and intuitionistic paradigms, and the introduction of logical operators that express metalogical notions in the object language. The aim of this paper is to show how these two ideas can be adequately accomplished by the logics of formal inconsistency and by the logics of formal undeterminedness. LFIs recover the validity of the principle of explosion in a paraconsistent scenario, while LFUs recover the validity of (...) the principle of excluded middle in a paracomplete scenario. We introduce definitions of duality between inference rules and connectives that allow comparing rules and connectives that belong to different logics. Two formal systems are studied, the logics mbC and mbD, that display the duality between paraconsistency and paracompleteness as a duality between inference rules added to a common core—in the case studied here, this common core is classical positive propositional logic. The logics mbC and mbD are equipped with recovery operators that restore classical logic for, respectively, consistent and determined propositions. These two logics are then combined obtaining a pair of LFI and undeterminedness, namely, mbCD and mbCDE. The logic mbCDE exhibits some nice duality properties. Besides, it is simultaneously paraconsistent and paracomplete, and able to recover the principles of excluded middle and explosion one at a time. The last sections offer an algebraic account for such logics by adapting the swap structures semantics framework of the LFIs the LFUs. This semantics highlights some subtle aspects of these logics, and allows us to prove decidability by means of finite nondeterministic matrices. (shrink)

Ainda que a estética de John Dewey tenha sido assunto de uma grande quantidade de estudos conduzidos através de abordagens muito diferentes há uma ausência de contribuições capazes de reconhecer vínculos entre a estética de Dewey e a história da arte. Neste artigo, analisamos três obras de arte da Antiguidade tardia, principalmente, seguindo os conceitos-chave de Dewey de análise formal e desvio, para reconstruir a experiência estética do autor, o observador e o patrono de cada obra de arte. Nosso propósito (...) é duplo. Primeiro, queremos demonstrar que uma abordagem baseada na teoria de Dewey é frutífera quando se estuda obras de arte antigas. Segundo, queremos demonstrar que uma interpretação pragmatista da arte antiga tardia é mais frutífera e menos reducionista do que as tradicionais. (shrink)

Book jacket: From postmodernist and post-philosophical quarters we now hear that philosophy is at the end of its rope, that modern philosophy is just another modernist product which has outlived its usefulness. Whatever the precise merits of the various postmodernist critiques, they have certainly compelled many philosophers to take notice, and to concede that their enterprise has reached an impasse. The essays in this volume mark a new stage in the debate. Though divergent in their philosophical -- or post-philosophical -- (...) standpoints, the authors all share the view that philosophy is at a fateful juncture. Postmodernism, pragmatism, feminism, and historicism are some of the tendencies scrutinized in this wide-ranging symposium on the past, present, and many possible futures of the 'institution of philosophy.'. (shrink)

Recent research with human embryos, in different parts of the world, has sparked a new debate on the ethics of genetic human enhancement. This debate, however, has mainly focused on gene-editing technologies, especially CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats). Less attention has been given to the prospect of pursuing genetic human enhancement by means of IVF (In Vitro Fertilisation) in conjunction with in vitro gametogenesis, genome-wide association studies, and embryo selection. This article examines the different ethical implications of the (...) quest for cognitive enhancement by means of gene-editing on the one hand, and embryo selection on the other. The article focuses on the ethics of cognitive enhancement by means of embryo selection, as this technology is more likely to become commercially available before cognitive enhancement by means of gene-editing. This article argues that the philosophical debate on the ethics of enhancement should take into consideration public attitudes to research on human genomics and human enhancement technologies. The article discusses, then, some of the recent findings of the SIENNA Project, which in 2019 conducted a survey on public attitudes to human genomics and human enhancement technologies in 11 countries (France, Germany, Greece, the Netherlands, Poland, Spain, Sweden, Brazil, South Africa, South Korea, and United States). (shrink)

In this paper, we argue that the Epicurean genealogy of justice and laws presuppose an analysis of the just as a modality of the useful, an approach that denies the conventional character of justice. This genealogical pattern differentiates the origin of justice from that of the law and refers to friendship as a relevant explanatory factor of the origin of justice. We maintain that the interpretations that underline the incoherence of this reference to friendship, in the framework of a hedonistic (...) theory, presuppose a non-Epicurean sharp distinction between altruism and selfishness. (shrink)

Resumen El artículo se estructura en torno a dos ejes: la concepción de la filosofía como una actividad extremadamente recursiva en su aplicación al saber científico, a la ética y a la pedagogía; la discusión en torno al realismo y al papel que le cabe a las representaciones en la explicación de la cognición. Se pone énfasis en mostrar la plausibilidad de los enfoques antirrepresentacionistas o constructivistas en las ciencias cognitivas, en la medida que estos enfoques pretenden superar las limitaciones (...) y prejuicios que son propios de los enfoques computacionalistas y conexionistas que le precedieron.This paper consists of two main topics: the conception of philosophy as an extremely recursive activity applied to scientific, ethics and educational knowledge; the discussion about realism and the role of the representations in the explanation of cognition. The validity of the anti-representationism or constructivist-based perspectives, is highlighted in Cognitive Sciences where these pretend to overcome the limitations and prejudices that belong to the previous computacionalism and connectionism perspectives. (shrink)

Como posso estar certo de que existe qualquer coisa de externa aos meus próprios pensamentos? Muitos filósofos procuraram ou apresentar uma prova da existência do mundo externo, ou rejeitar a inteligibilidade da própria ideia de uma “prova” nesse contexto. O objetivo desse artigo é mostrar que o denominado “problema do mundo externo” decorre de uma má compreensão acerca do que seja justificativa epistêmica. Apresento o que denomino “paradoxo de Berkeley” de modo a mostrar que o uso ordinário da linguagem não (...) deve funcionar como critério de correção para a aplicação de conceitos como conhecimento e existência. Concluo que tanto as tentativas tradicionais de se apresentar uma prova da existência do mundo externo quanto as tentativas de se mostrar que o problema não faz sentido são equivocadas. O que deve ser levado em conta no exame do problema do mundo externo é o contexto em que a proposta cética é feita. (shrink)

O uso de certas drogas e de certos procedimentos para fins de melhoramento do desempenho nos esportes é banido pelas autoridades esportivas. Mas como pretendo mostrar neste artigo, alguns dos principais argumentos contra o uso de tecnologias para aprimoramento nos esportes são problemáticos. Autores como, por exemplo, Michael Sandel se comprometem com uma concepção metafísica de natureza humana na defesa da manutenção das regras que proíbem o uso de doping. Essa concepção de natureza humana, como procuro mostrar no artigo, é (...) incompatível com a ideia corrente segundo a qual seres humanos, tal como os conhecemos hoje, resultam de um gradual processo de evolução por seleção natural. Disso não se segue, porém, como procuro mostrar na última sessão do artigo, que nenhuma das regras que proíbem o uso de tecnologias para fins de aprimoramento nos esportes seja moralmente justificada. O artigo argumenta em prol de uma liberação moderada de algumas drogas e procedimentos para fins de melhoramento do desempenho nos esportes. (shrink)

Argumento de autoridade é todo aquele que pretende estabelecer a plausibilidade de uma proposição na credibilidade de quem a proferiu. Neste caso, a pessoa, disciplina ou tradição, a que se apela na argumentação, precisa ser aceita como uma autoridade incontestável na área da proposição em questão. O uso falacioso da autoridade, bastante frequente, faz com que os argumentos de autoridade em geral sejam mal vistos, mesmo quando pertinentes. Neste trabalho, revisa-se o conceito de argumento de autoridade e os critérios convencionais (...) para verificação de sua legitimidade. Além disso, coloca-se em questão a própria noção de autoridade e a aceitabilidade de seu uso em debates filosóficos, em que os critérios convencionais para sua avaliação não se aplicam de todo. Argumenta-se, por fim, que é razoável o uso de argumentos de autoridade no enfrentamento de questões filosóficas. (shrink)

Boolean-valued models of set theory were independently introduced by Scott, Solovay and Vopěnka in 1965, offering a natural and rich alternative for describing forcing. The original method was adapted by Takeuti, Titani, Kozawa and Ozawa to lattice-valued models of set theory. After this, Löwe and Tarafder proposed a class of algebras based on a certain kind of implication which satisfy several axioms of ZF. From this class, they found a specific 3-valued model called PS3 which satisfies all the axioms of (...) ZF, and can be expanded with a paraconsistent negation *, thus obtaining a paraconsistent model of ZF. The logic (PS3 ,*) coincides (up to language) with da Costa and D'Ottaviano logic J3, a 3-valued paraconsistent logic that have been proposed independently in the literature by several authors and with different motivations such as CluNs, LFI1 and MPT. We propose in this paper a family of algebraic models of ZFC based on LPT0, another linguistic variant of J3 introduced by us in 2016. The semantics of LPT0, as well as of its first-order version QLPT0, is given by twist structures defined over Boolean agebras. From this, it is possible to adapt the standard Boolean-valued models of (classical) ZFC to twist-valued models of an expansion of ZFC by adding a paraconsistent negation. We argue that the implication operator of LPT0 is more suitable for a paraconsistent set theory than the implication of PS3, since it allows for genuinely inconsistent sets w such that [(w = w)] = 1/2 . This implication is not a 'reasonable implication' as defined by Löwe and Tarafder. This suggests that 'reasonable implication algebras' are just one way to define a paraconsistent set theory. Our twist-valued models are adapted to provide a class of twist-valued models for (PS3,*), thus generalizing Löwe and Tarafder result. It is shown that they are in fact models of ZFC (not only of ZF). (shrink)

Summary Pluralism and monism are the two current views concerning scientific research and language understanding. Between them there is a third, intermediate, view. We take a procedural methodology of science as exemplified in the work of L. Tondl, and procedural linguistics , as exemplified in the work of B. Harrison, to be representative of this third possibility. Procedures are cognitive, linguistic, and physical processes which, through their hierarchical interconnections can generate fruitful mechanisms . These mechanisms are sensitive to context and (...) operate in heuristic and algorithmic ways. Their similar logical structure points towards a profound unified basis for scientific and linguistic activities, thus providing an interesting bridge between what is achieved by a little child talking to his parents, and a creative scientist struggling to interpret the results of his experiments. (shrink)