Se presenta el argumento de W. T. Stace sobre el realismo señalando no que éste sea falso sino solamente que no hay absolutamente ninguna razón para considerar que sea verdadero y por tanto no tenemos por qué creerlo. Esto se aplica a la discusión de la pregunta: ¿Cómo sabemos que los átomos existen? Haciendo referencia a algunas de las respuestas científicas más importantes conocidas que son en orden cronológico: i) La ley de las proporciones definidas o Ley de Proust, ii) (...) la teoría cinética de los gases, iii) el movimiento Browniano y, iv) imágenes de microscopio de efecto túnel. (shrink)

The US poultry industry based on flexible accumulation has been advanced as the model of agro-industrial development for agrifood globalization. Similarly, Mexico has been presented as a noteworthy example of the negative effects of neoliberal restructuring associated with the globalization project. In this paper we use both of these assertions as points of departure to guide an investigation of the case of the restructuring of the Mexican poultry industry. Informed by a commodity systems analysis, archival data and key informant interviews (...) are used to generate an overview of the history of the poultry industry in Mexico. A sociology of agrifood theoretical framework informed by regimes theory is employed to analyze the events of the case. We conclude that neoregulation related to the IMF and NAFTA restructuring in Mexico facilitated the diffusion of the US model of poultry production. (shrink)

Claims that necessary and sufficient conditions are not converse relations are discussed, as well as the related claim that If A, then B is not equivalent to A only if B . The analysis of alleged counterexamples has shown, among other things, how necessary and sufficient conditions should be understood, especially in the case of causal conditions, and the importance of distinguishing sufficient-cause conditionals from necessary-cause conditionals. It is concluded that necessary and sufficient conditions, adequately interpreted, are converse relations in (...) all cases. (shrink)

One of the most important characteristics of modern science is its replicability and objectivity. This means that a scientific result is taken as such only when it has been reproduced by other scientists. Indeed, the replicability of a scientific result in an objective and independent way by members of a scientific community is the cornerstone of science. Experimental laser physics is an example of “normal” science, where it is no doubt that the phenomenon could be replicated; however, the replication process (...) may not be straightforward since it requires a good understanding of the physics behind it, as well as good technical skills. In this article, two laboratory cases of experiments on laser physics are presented: the first one deals with a Nitrogen N2 laser with a Polloni excitation circuit, and the second one deals with a transversally excited TEA carbon dioxide laser. For the nitrogen laser, it will be shown that reproducibility failed, and therefore, the reported experiment cannot be taken as a valid contribution to the advancement and understanding of nitrogen laser physics and technology. On the other hand, for the case of the TEA carbon dioxide laser, several comments are presented on the development of this finally successful experiment. Both cases show the importance of being technically up-dated in order to reproduce or improve the results reported by other researchers. Finally, a discussion about: What can we learn about the research practice from these two cases? It is presented, as well as the conclusions about the case studies; we hope they may be useful to philosophers of science and young scientists alike. (shrink)

An extended examination of Libet's works led to a comprehensive reinterpretation of his results. According to this reinterpretation, the Minimum Train Duration of electrical brain stimulation should be considered as the time needed to create a brain stimulus efficient for producing conscious sensation and not as a basis for inferring the latency for conscious sensation of peripheral origin. Latency for conscious sensation with brain stimulation may occurafterthe Minimum Train Duration. Backward masking with cortical stimuli suggests a 125-300 ms minimum value (...) for the latency for conscious sensation of threshold skin stimuli. Backward enhancement is not suitable for inferring this latency. For determining temporal relations between stimuli that correspond to subjects' reports, theendof cerebral Minimum Train Duration should be used as reference, rather than its onset. Results of coupling peripheral and cortical stimuli are explained by a latency after the cortical Minimum Train Duration, having roughly the same duration as the latency for supraliminal skin stimuli. Results of coupling peripheral stimuli and stimuli to medial lemniscus (LM) are explained by a shorter LM latency and/or a longer peripheral latency. This interpretation suggests a 230 ms minimum value for the latency for conscious sensation of somatosensory near-threshold stimuli. The backward referral hypothesis, as formulated by Libet, should not be retained. Long readiness potentials preceding spontaneous conscious or nonconscious movements suggest that both kinds of movement are nonconsciously initiated. The validity of Libet's measures of W and M moments (Libet et al., 1983a) is questionable due to problems involving latencies, training, and introspective distinction of W and M. Veto of intended actions may be initially nonconscious but dependent on conscious awareness. (shrink)

O presente ensaio se empenha em problematizar elementos contidos nos conceitos de illness e disease proposto pelo Dr. Arthur Kleinman ; especificamente no capítulo II do seu livro “The illness narratives: surfering, healing and the human condition. Nesta obra Kleinman vai dissecar o fenômeno da enfermidade e suas aflições tendo reflexos nas reações psicológicas e sociais. Ou seja, a disease tendo desdobramento na illness. A questão fundamental a que esse ensaio propõe é pensar uma inversão e refletir se illness altera (...) disease? Minha proposta é adentrar neste caminho pela via das reações emocionais e homeostasia. (shrink)

Hablar de emancipación en la sociedad neoliberal, es cuestionar ciertos principios y valores de democracia participativa donde la noción de ciudadanía pública debe ser ampliada más allá de la mera discusión de carácter ético; precisamente, porque la democracia ciudadana es un concepto que defi..

This paper investigates whether 'even if A, B' is pragmatically polysemic, so that a nonconcessive conditional may have 'even if', and whether concessive conditionals, pragmatically defined, can fail to have 'even if' or a non-temporal 'still'. Different paraphrases are used to help elucidate pragmatic meanings. A theory of the pragmatic meanings of concessive and implicative conditionals is presented. The semantic meaning of 'even if' and the question of whether concessive conditionals imply the truth of their consequents are also discussed.

A commentary is given on Trevena and Miller . The comparability of their experimental task and of the potential they recorded with those used and recorded by Libet, Gleason, Wright, and Pearl is questioned. An interpretation is given for the similarity of event-related potentials recorded when subjects decided to move and when they decided not to move.

A theory of necessary and sufficient conditions is presented, as well as a theory of necessary and sufficient causes and effects, viewed as a particular case of the former. Ambiguities of the terms 'condition' and 'necessary condition' are explored, and a neutral meaning for 'condition' is favoured. The relation between necessary and sufficient conditions and implicative conditionals (including counterfactuals) is also discussed. Two problems of counterfactual theories of causal explanation are indicated, concerning (i) how to account for causes that are (...) not necessary and (ii) how to interpret the counterfactual from the negation of the effect to the negation of the cause. Application of the theory of necessary and sufficient conditions to Euler’s explanation of the Königsberg bridge problem is discussed. The theory of necessary and sufficient causes and effects is then applied to the flagpole shadow explanation and to two biological explanations, one involving a sufficient but not necessary cause and the other a necessary but not sufficient cause. Causes that are neither sufficient nor necessary are also recognized. Finally, a probabilistic approach to causes that are either not sufficient or not necessary is explored, including its application to examples of such cases. (shrink)

It is argued that contraposition is valid for a class of natural language conditionals, if some modifications are allowed to preserve the meaning of the original conditional. In many cases, implicit temporal indices must be considered, making a change in verb tense necessary. A suitable contrapositive for implicative counterfactual conditionals can also usually be found. In some cases, the addition of certain words is necessary to preserve meaning that is present in the original sentence and would be lost or changed (...) in the contrapositive without them. A distinction is made between adding new meaning and adding new words to preserve existing meaning. For concessive conditionals and relevance conditionals, however, no valid contrapositive can be found. They do not belong to the class of contraposable conditionals, which can be independently defined. Difficult cases are also discussed in which the contradictory of the consequent semantically entails the truth of the antecedent. In such cases the content of the antecedent is implicit in the meaning of the consequent. Contraposition becomes possible if what is implicit in the original consequent is made explicit in the contrapositive antecedent. (shrink)

This paper compares two logical conditionals which are strengthenings of the strict conditional and avoid the paradoxes of strict implication. The logics of both may be viewed as extensions of KT, and the two conditionals are interdefinable in KT. The implicative conditional requires that its antecedent and consequent be both contingent. The consequential conditional may be viewed as a weakening of the implicative conditional, insofar as it also admits the case in which the antecedent and the consequent are strictly equivalent (...) (either both necessary or both impossible). The two conditionals share a number of properties, among them Transitivity, Contraposition, Aristotle’s Thesis, Weak Boethius’ Thesis and Aristotle’s Second Thesis. They also share some restricted principles such as Possibilistic Monotonicity, Possibilistic Simplification and Possibilistic Right Weakening. They differ in relation to Identity, which is validated by consequential implication, while the implicative conditional only validates the restricted principle of Possibilistic Identity. The relations between the two conditionals are represented by two Aristotelian cubes of opposition, one involving the contrariety between If A, then B and If A, then ¬B, according to Weak Boethius’ Thesis, and the other the contrariety between If A, then B and If ¬A, then B, according to Aristotle’s Second Thesis. We also explore the relations between the two logical conditionals and natural language conditionals, emphasizing the dependence of the latter on the context, and the need to distinguish natural language conditionals which may be viewed as consequential or implicative, on one side, and concessive and some other types of conditionals, on the other. (shrink)

1. Introduction The readiness potential was found to precede voluntary acts by about half a second or more (Kornhuber & Deecke, 1965). Kornhuber (1984) discussed the readiness potential in terms of volition, arguing that it is not the manifestation of an attentional processes. Libet discussed it in relation to consciousness and to free will (Libet et al. 1983a; 1983b; Libet, 1985, 1992, 1993). Libet asked the following questions. Are voluntary acts initiated by a conscious decision to act? Are the physiological (...) facts compatible with the belief that free will determines our voluntary acts? What is the role of consciousness in voluntary action? In this paper I will discuss these questions and the answers that Libet gave to them. (shrink)

El texto presenta una clasificación de los principales movimientos sociales populares de América Latina y aborda problemas del eje diversidad, identidad y articulación entre ellos. Se analizan algunos de los problemas presentes en el nuevo escenario y territorio político regional marcado por las políticas posneoliberales y la emergencia del movimiento social popular frente a la civilización excluyente, patriarcal, discriminatoria y depredadora del capital.

Los procesos reales, en curso, desbordan los análisis dicotómicos y muestran un cuestionamiento cada vez más profundo de la modernidad capitalista, entendida como sistema múltiple de dominación. Los movimientos sociales producen saberes vinculados a procesos políticos-civilizatorios de ruptura, con carácter estratégico, siempre incompletos, inacabados y en construcción, pero que cuestionan la lógica moderna y capitalista de la vida. El trabajo indaga sobre los significados teóricos y prácticos de estos saberes emancipadores y las nuevas propuestas sobre los movimientos sociales en América (...) Latina. (shrink)

The analysis is restricted to the architectural aspect. It puts in evidence a dialectical procedure which makes the gnoseological importance of the verb to look stand out clearly. The pharisee's knowledge is based on religious convictions ; that of the blind man on his experience.

Um dos objetivos da revista eletrônica Kínesis é apresentar pesquisadores que tenham seu nome vinculado a pesquisas sobre temas filosóficos contemporâneos. Para abrilhantar a edição inaugural e especial da revista Kínesis, apresentamos uma entrevista com um dos professores que, além de pesquisar temas filosóficos contemporâneos, fortemente trabalhou para a instalação do programa de pós-graduação em Filosofia na Faculdade de Filosofia e Ciências do campus da UNESP de Marília.

O artigo parte do estabelecimento do campo do afroperspectivismo, em que se define um olhar posicionado, do ponto de vista etnico-racial, para se chegar à análise da Trilogia da Bicha Preta, curtas-metragens dirigidos por Juan Rodrigues, em formato de filme ensaio que desenvolvem o que se concebe como o cinema da negritude queer.

Cinema is commonly hailed as "the universal language," but how does it communicate so effortlessly across cultural and linguistic borders? Drawing on a lifetime's worth of viewing an reviewing, influential critic Gilberto Perez invokes a dizzying array of masters past and present includin Chaplin, Ford, Kiarostami, Eisenstein, Malick, Mizoguchi, Haneke, Hitchcock, and Godard--to explore the transaction between filmmaker and audience. The Eloquent Screen shows how cinema, as the consummate contemporary art form, establishes a thoroughly modern rhetoric in which different (...) points of view are brought into clear focus.". (shrink)

"Tough, smart, superbly engaging, The Material Ghost is a terrific book." -- Edward W. Said In The Material Ghost , Gilberto Perez draws on his lifelong love of the movies as well as his work as a film scholar to write a lively, wide-ranging, penetrating study of films and filmmakers and the nature of the art form. For Perez, film is complex and richly contradictory, lifelike and dreamlike at once, a peculiar mix of reality and imagination. "The images on (...) the screen," he writes, "carry in them something of the world itself, something material, and yet something transposed, transformed into another world: the material ghost." "Dazzling... The sheer intelligence at work in these lucid pages is exhilarating." -- Alfred Guzzetti, Boston Book Review "A pleasure. Gilberto Perez is one of the smartest film critics writing anywhere." -- Jonathan Rosenbaum "Strikes an ideal balance between insightful analysis and graceful writing... A model of thoughtful criticism." -- David Sterritt, Christian Science Monitor "Brilliantly polemical in his critique of cynical reason ('the official philosophy of late capitalism'), no less passionate in defending the truth-value of cinema, Perez seems to be the clearest heir to the great humanist critic André Bazin." -- Sight & amp Sound "The chapters on Keaton and Renoir are stunning, full of perceptive remarks the chapter on Godard is a persuasive rehabilitation none of the chapters is without memorable insights." -- Michael Wood, London Review of Books "Gilberto Perez's ambitious, abundant, and cultivated book--the fruit of decades of thinking and teaching -- accompanies readers on a journey of discovery into the wonder of film." -- Stanley Cavell "Few books of film criticism in the past twenty-five years have been so enjoyable or instructive... [Perez] has excellent things to say about authorship, about documentaries, about popular genres, about cinematic point of view and narrative technique, about actors, and above all about camera style... He makes us want to look once more at the remarkable pictures he discusses." -- James Naremore, Cineaste. (shrink)

Libet's (2000) arguments in defense of his interpretation of his experimental results are insufficient. The claims of my critical review (Gomes, 2008) do not suffer with his new statements.

While agreeing with Fischborn’s (2018) contention that, according to one traditional definition of compatibilism, my position should be classified as that of a libertarian incompatibilist, I argue here for a different view of compatibilism. This view involves, on the one hand, local probabilistic causation of decisions (rather than universal strict determinism) and, on the other, free will conceived as involving decisions generated by a decision-making process carried out by the brain, which consciously contemplates different alternatives and could in principle have (...) been different from what it was, implying that the agent could in normal conditions have done otherwise in the same circumstances. After discussing different views of causation (including determinism) and of free will, I make a revision of some passages from my earlier work, quoted by Fischborn. I conclude that what is crucial in the question of (in)compatibilism is the (in)compatibility between freedom of decisions and natural causation of human actions. According to this looser and, I argue, more pertinent view of compatibilism, I maintain my previous classification of my position on the matter as compatibilist. (shrink)

A commentary on articles by Klein, Pockett, and Trevena and Miller, in this issue, is given. Average shift in the point of subjective equality , calculated by Klein on Libet's data, and corresponding change in mean shift, calculated by Libet et al. , may be “corrected,” taking as a reference point the end of the minimum train duration. Values obtained, if significant, indicate a latency for conscious sensation of the skin stimulus of at least 230 ms. Pockett's main conclusions are (...) favored, but her explanation of peripheral–lemniscal couplings is found to be unconvincing. Trevena and Miller's article unsuccessfully tries to rescue a dualist interactionist view. Libet's method of timing intentions is thoroughly criticized. (shrink)

Se resaltan algunas peculiaridades sobre la manera como la Asociación Médica Mundial enfoca ciertos temas, ya que sus declaraciones y resoluciones reflejan cambios más o menos apreciables, que son manifiestos en los contenidos de ellas y orientan sus políticas. Se hace un comentario comparativo de las versiones de la Declaración de Ginebra de 1948 y 2017 con el Juramento hipocrático teniendo en cuenta las siguientes categorías: Carácter de la declaración; Tiempo verbal; Extensión en apotegmas o sentencias; núcleo epistémico; omisiones; innovaciones; (...) tipo de ethos. Las facultades de Medicina deberían incluir en sus currículos los acentos y contenidos convenientes para que el ethos hipocrático se conserve y la profesión médica pueda seguir gozando de la confianza, el respeto y el honor, que solo se mancillan cuando en la práctica profesional se cede terreno por intereses autónomos y economicistas. Como alternativa orientadora a las declaraciones de Ginebra se sugiere la versión creada por el Value of Life Committee, Inc. (shrink)

Universal Declaration of Human Rights anniversary: More shame than glory? Aniversário da Declaração Universal dos Direitos Humanos: mais pena que glória? Para citar esta editorial / to reference this editorial / para citar esta editorial Gamboa-Bernal GA. Aniversario de la Declaración Universal de los Derechos Humanos: ¿más pena que gloria?. Pers Bioet. 2019; 23: 6-13. DOI: https://doi.org/10.5294/pebi.2019.23.1.1.

Después de casi medio siglo fue derogada la sentencia del caso Roe vs. Wade por la Corte Suprema de los Estados Unidos, lo que puede suponer el fin del aborto en ese país. Se mencionan algunos antecedentes, hitos históricos, arreglos y el contexto de la situación que desembocó en la sentencia mediante la cual se estableció el derecho constitucional al aborto (Roe vs. Wade), se mantuvo la decisión tomada (Planned Parenthood vs. Casey) y finalmente cómo se revocaron las sentencias anteriores (...) (Dobbs vs. Organización de Salud Femenina Jackson). Se concluye, desde una perspectiva biojurídica, que se corrigió un fallo no solo controvertido en su aplicación, sino sobre todo en su génesis, donde queda claro que el aborto no es un derecho constitucional y que los organismos judiciales no son competentes para regular sobre esa materia y sobre otras análogas. Desde el punto de vista bioético, es un fallo revocatorio histórico, que rectificó una de las mayores injusticias contemporáneas, que puso por encima la autonomía individual sobre el hecho biológico incontrovertible de una nueva vida humana y el cuidado que demanda su dignidad ontológica: Roe vs. Wade costó la vida a millones de embriones, en los Estados Unidos y en el resto del mundo. (shrink)

Post-pandemic: Triple Agenda for a New RealityPós-pandemia: tripla agenda para uma nova realidadeNew fields for applying bioethics have emerged out of the SARS-Cov-2 pandemic, but many bioethical challenges remain; so, it is necessary to reflect on the reality that human beings will have to live after that. This reflection builds on a triple agenda: challenges, warnings, and guidance. The challenge agenda deals with upcoming scientific and biotechnological developments, adjustments to work and study, sustainable development reorientation, and changes in businesses and (...) entertainment companies. These challenges could be summarized as development paradigm shifts. The warning agenda includes the management of wild species, mistrust in political leaders, unsupportive and criminal human behavior, information overabundance, the emulation of pharmaceutical industries, and the determining factors of the culture of death. These warnings could be condensed in the importance of promoting the culture of life. The guidance agenda comprises a series of principles such as the human person’s dignity, the common good, the preferential option for the poor, the universal allocation of goods, solidarity, subsidiarity, and the care for our common home. This guidance points to a fundamental and existential environmental transformation. All these changes will be possible because of human resilience, professionalism, and social solidarity, shaping an actual comprehensive human development project.Para citar este editorial / To reference this editorial / Para citar este editorialGamboa Bernal GA. Pospandemia: triple agenda para una nueva realidad. Pers Bioet. 2020;24:127-135. DOI: https://doi.org/10.5294/pebi.2020.24.2.1Publicado: 27/11/2020. (shrink)

_Historic and Scientific Assertion of the Humanae Vitae, Fifty Years Later_ _Reivindicação histórica e científica da humanae vitae, cinquenta anos depois_ Muchas veces se ha dicho que mayo de 1968 fue un hito en la cultura contemporánea. Esa revolución, que no fue nada silenciosa, no se extinguió espontáneamente sino que sus efectos se siguen cosechando, aún en el siglo XXI.

Bergson em As duas fontes da moral e da religião se propõe a investigar a origem da moralidade e da religiosidade humana, encarando-as como formas criadas pelo élan vital no curso do desenvolvimento da vida. Bergson concebe o surgimento da sociedade como algo natural, isto é, como um artifício da natureza para que o homem pudesse perseverar no mundo; assim, sua pesquisa visa encontrar e analisar os caminhos que a vida mesma armou no interior do humano, em sua constituição biológica, (...) para que ele pudesse se apegar de diversas formas à existência. Descortinando os motivos pelos quais as variadas sociedades, bem como suas mais diferentes morais se constituem como fechadas ou visando aos interesses da espécie, e abertas, tendo na humanidade uma referência por onde o amor criativo passaria, o filósofo nos mostra como determinados homens, excepcionais, vêm ao mundo encarnado em múltiplos sentidos uma nova atitude criadora, ainda não expressa, que se revela através de uma intuição despertada por uma emoção profunda. Dessa forma, a relação entre moral, vida e emoção é o que cumpre aqui estabelecer, uma vez que as leis morais seguidas pela humanidade são, no limite, necessidades vitais colocadas pela natureza e que só alcançam um desenvolvimento melhor graças à inteligência humana que, mesmo atrelada à necessidade imposta, também pode encontrar dentro de si a abertura para uma liberdade possível. (shrink)

Em sua última obra, As Duas Fontes da Moral e da Religião, Henri Bergson investiga as origens, o desenvolvimento e a manutenção da sociedade humana por meio da distinção entre a sociedade fechada, baseada nos instintos primitivos de conservação da vida, e a sociedade aberta, fundada sobre a aspiração que impulsiona o homem à construção de uma vida em sociedade mais harmoniosa. Segundo o autor, os ideais democráticos são frutos da abertura de que as sociedades necessitam para seu progresso, o (...) qual, aos poucos, abrandaria a pressão das exigências impostas pela natureza para a conservação da vida em sociedade e possibilitaria aos homens conviverem mais livremente e mais afetuosamente com vistas a uma sociedade mais justa e sem tantos conflitos e mortes. Contudo, como escapar às determinações que a natureza impôs para que a vida em sociedade se mantivesse e conseguir que os homens se abram a outro tipo de vivência em conjunto? É esta a questão que o presente artigo procura investigar. Palavras-chave: Bergson, moral, política, mística. (shrink)

The blogosphere’s heterogeneity has significantly increased in recent years. Thus, the blog-as-diary approach has shown its limitations. Viewing blogs as a genre is also misleading, as it confuses medium and genre. Considering that the studies of blog genres still need further theoretical and empirical investigations, we propose a method to assess blog posts, understood as utterances, the minimal unit of a blog. We then conduct an analysis of two large datasets from 100 Brazilian blogs. Three reviewers read and judged 5218 (...) posts from 50 A-list blogs and 1527 posts from 50 non-A-list blogs, captured in a 30-day period. Posts’ compositional form, theme and style were cross-analyzed in and between datasets. Our findings lead to the conclusion that blogs in the A-list group tend to post more and stick to themes that attract audiences. Non-A-list blogs post less and focus on themes of interest to bloggers themselves, not necessarily hype topics. (shrink)