Le problème métaphysique central en philosophie de l’esprit concerne la relation entre l’esprit et le corps des agents. Quand on tente d’expliquer, par exemple, le rapport entre les pensées et les actions humaines, on est alors immédiatement confronté avec la difficulté, apparemment insurmontable, d’expliquer la causalité mentale. On doit répondre à la question : nos états de pensée causent-ils effectivement ce que l’on fait? Bien sûr, nos croyances, nos intentions et nos désirs sont à la base de notre comportement, dira (...) le sens commun et une longue tradition philosophique. Cependant, certains philosophes ont récemment manifesté des doutes à propos du rôle réel de nos pensées sur nos actions. Pour contrer ce scepticisme, il nous faut expliquer comment des états de pensée peuvent exercer leur rôle causal dans un monde fondamentalement physique. Je vais donner ici les raisons pour lesquelles je crois que les états de pensée sont indispensables à l’explication complète de nos actions. Pour ce faire, je procéderai à une analyse approfondie de la relation entre la causalité mentale ou intentionnelle et la causalité physique. Je mettrai en perspective deux approches importantes sur la causalité mentale : celle de John Searle, qui défend la réalité des états mentaux et semble résister au réductionnisme, et celle de Jaegwon Kim, qui montre le péril auquel l’approche de Searle est exposée : la surdétermination causale! Selon Searle, le mental est un trait du monde physique . Aux yeux de Kim cette stratification en niveaux n’apporte aucune solution au problème de la causalité mentale. Kim a-t-il raison? (shrink)

O artigo investiga a frequente alegação na literatura filosófica de que a concepção de Searle sobre a redução da consciência é incoerente. Após um exame das teses básicas de sua teoria da mente , é discutida sua posição a respeito da identidade entre a consciência e a atividade cerebral . Da adesão de Searle a uma tese da identidade de ocorrências deve-se concluir que não há contradição entre esta tese e a irredutibilidade ontológica que ele defende. Porém, é possível deduzir (...) de sua teoria asserções que contradizem esta mesma teoria , uma vez que essa irredutibilidade resulta em um dualismo de propriedades. (shrink)

http://dx.doi.org/10.5007/1808-1711.2012v16n2p255 O artigo investiga se o naturalismo biológico (a solução de John Searle para o problema mente-corpo) pode ser considerado uma concepção fisicalista acerca da mente. Apesar de defender um fisicalismo a respeito dos particulares (seção 2), Searle adere ao argumento básico dos dualistas para a irredutibilidade das propriedades mentais (seção 3), e não consegue fundamentar sua alegação de que tal irredutibilidade é compatível com o fisicalismo (seção 4). Desse modo, sua teoria da mente se revela como um dualismo de (...) propriedades. (shrink)

John Searle's The Rediscovery of the Min is a sustained attempt to locate the mind and the mental firmly in the realm of the physical. Consciousness ,claims Searle, is just an ordinary biological feature of the world ... More specifically,``[t]he mental state of consciousness is just an ordinary biological, that is, physical featureof the brain''. Searle is adamant: ``Consciousness,to repeat, is a natural biological phenomenon''.

In my article I evaluate Searle's account of mental causation, in particular his account of the causal efficacy of unconscious intentional states. I argue that top-down causation and overdetermination are unsolved problems in Searle's philosophy of mind, despite his assurances to the contrary. I also argue that there are conflicting claims involved in his account of mental causation and his account of the unconscious. As a result, it becomes impossible to understand how unconscious intentional states can be causally efficacious. My (...) conclusion will be that if Searle's conception of unconscious intentionality is to play a genuine role in the causal explanation of human action, it needs to be rethought. (shrink)

We shall see that both these projects are deeply misguided. The first suffers from Searle’s misrepresentation, en masse and individually, of the various materialist theories. To show this, I will focus on the basic claims of token identity specifically, and draw out the inaccuracy of Searle’s straw materialism. This is a shortcut; by showing one conjunct to be false, we may show the conjunction of Searle’s summaries to be false. And, after all, token identity is the most widely held current (...) view. Searle’s second project, I will argue, is characterized by two unfortunate traits: it makes some confused and unsupported claims about supervenience and causality, and, when interpreted most charitably, it is fundamentally indistinguishable from a prevalent account of token identity augmented by supervenience. (shrink)

There is a tension or even contradiction between mental causation - the belief that some mental events or properties are causally relevant for some physical events or properties - and the irreducibility of mental features to physical ones, the causal closure of the physical, and the assumption that there is no overdetermination of the physical. To reconcile these premises was a promise of nonreductive physicalism, but a closer inspection shows that it is, on the contrary, a source of the problem (...) - namely, the unintelligibility of mental causation. This has to do with the widely-held assumption that the mental supervenes on the physical. How can the mental be causally relevant, then? And what is the relationship of the mental and the physical? There are many options, including identity, realizationism, emergence, or some kind of reducibility. But they all have their own problems, e.g. they threaten mental reality, the causal closure of the physical, or scientific explanations. All these aspects are covered in Jaegwon Kim's book Mind in a Physical World. This paper is a detailed introduction to it, discussing and critically commenting it and those still intriguing, but also confusing and complicated issues of the mind-body problem, especially the ontology of mental causation. (shrink)

Resumen En el marco de la filosofía de la mente, este artículo aborda el problema de la causación mental en el proyecto naturalista biológico de John Searle. A partir de la concepción de la mente como un fenómeno emergente de procesos cerebrales, evalúo las críticas que Jaegwon Kim realiza a la eficacia causal de la consciencia, centrándome en los argumentos de sobredeterminación y violación del principio de clausura físico causal. Luego analizo el debate de la causación mental a partir de (...) los descubrimientos de Benjamin Libet respecto a la existencia de actividad neuronal pre-consciente en la conducta motora voluntaria. Dicha actividad, llamada potencial de preparación, junto a la noción de causación trabajada en neurociencia, avala la eficacia causal de los estados mentales, pero en un sentido distinto al propuesto por Searle.Within the framework of philosophy of mind, this paper addresses the problem of mental causation in John Searle's biological naturalist project. Beginning with the conception of the mind as a phenomenon emerging from cerebral processes, I evaluate the criticisms that Jaegwon Kim makes to the causal efficacy of consciousness, focusing on the arguments of overdetermination and violation of the principle of physical causal closure. Then, I analyze the debate on mental causation from the findings of Benjamin Libet regarding the existence of pre-conscious neural activity in voluntary motor behavior. This activity, called readiness potential, and the notion of causation worked in neuroscience, support the causal efficacy of mental states, but in a different sense from that proposed by Searle. (shrink)