'Material thing' is a two-level concept. In 'first-order extension' - the field of perceptual experience - it is a 'body' that may 'body forth' (show, express) a 'content', like the bodies of persons or pictures. In 'second-order extension' -the physical field or space - it is a 'physical object' whose micro-constitution is the target of the reference of theoretical terms or formulae. As such, it has no content - nothing to 'express'. In the description of a material thing in first-order (...) extension, terms are used whose reference is fixed by ostension. (The picture's pigment is cracked, the person's eyes are blue.) The reference of theoretical terms - to the material thing in second-order extension - is fixed by their interrelationships in the theory. (shrink)

Many religiously minded materialist philosophers have attempted to understand the doctrine of the survival of death from within a physicalist approach. Their goal is not to show the doctrine false, but to explain how it can be true. One such approach has been developed by Peter van Inwagen. After explaining what I call the duplication objection, I present van Inwagen’s proposal and show how a proponent might attempt to solve the problem of duplication. I argue that the very features of (...) the view that aid the proponent in responding to the duplication objection entails the possibility of an impossible state of affairs—that two distinct persons can at the same time be identical with the same bundle of material simples. The religiously minded materialist is caught between the horns of a dilemma. One’s view regarding human persons must be robust enough to account for personal identity over time, and so not fall to the duplication objection. At the same time, the view must not entail the possibility of two persons temporarily having complete coincident existence. (shrink)

I argue that, unlike your brain, you are not composed of other things: you are simple. My argument centers on what I take to be an uncontroversial datum: for any pair of conscious beings, it is impossible for the pair itself to be conscious. Consider, for instance, the pair comprising you and me. You might pinch your arm and feel a pain. I might simultaneously pinch my arm and feel a qualitatively identical pain. But the pair we form would not (...) feel a thing.1 Pairs of people themselves are incapable of experience. Call this The Datum. What explains The Datum? I think the following exhaust the reasonable options. (1) Pairs of people lack a sufficient number of immediate parts. (2) Pairs of people lack immediate parts capable of standing in the right sorts of relations to each other and their environment. (3) Pairs of people lack immediate parts of the right nature. (4) Pairs of people are not structures (they are unstructured collections of their two immediate parts). (5) Some combination of (1) – (4). Finally, (6) pairs of people are not simple. (shrink)

I respond to Belot's argument and defend the view that sometimes `fundamental theories' are explanatorily inadequate and need to be supplemented with certain aspects of less fundamental `theories emeritus'.

Originally written in 1956 and revised in 1972, this book explores the work of many of the most important thinkers of the 20th century, including Ayer, ...

A mutation alters the hemoglobin in some members of a species of antelope, and as a result the members fare better at high altitudes than their conspecifics do; so high-altitude foraging areas become open to them that are closed to their conspecifics; they thrive, reproduce at a greater rate, and the gene for altered hemoglobin spreads further through the gene pool of the species. That sounds like a classic example (owed to Karen Neander, 1995) of a causal chain traced by (...) evolutionary biology. But a view now nearly universal among philosophers maintains that such biological causation is always shadowed, perhaps even rivaled, by causation on a different level.1 That the subgroup of antelopes forages in areas closed to the conspecifics is a state of affairs embodied or realized, notes this view, in certain movements and state changes done by certain physical microparticles—untold billions of microparticles and movements, but a finite and determinate (more on this below) collection nevertheless. That the subgroup reproduces at a greater rate is likewise realized by a huge collection of microparticle movements, a different collection. And the microparticle happenings comprised in the first collection are causally responsible, strictly in accordance with the laws of microphysics, for the microparticle happenings in the second. Biological causation is always shadowed, perhaps even rivaled, by causation on the level of microphysics. The view I mean is general: any case of causing uncovered by any of the special sciences can be recaptured at the level of microphysics. This view is I think what most philosophers mean by “physicalism”; in any case, “physicalism” is the label I shall use. Physicalism comes in two forms. Modest physicalism holds that any causal transaction reported by the special sciences can be retraced by microphysics.2 Hegemonic physicalism holds that retracing such a transaction at the level of.. (shrink)

A mutation alters the hemoglobin in some members of a species of antelope, and as a result the members fare better at high altitudes than their conspecifics do; so high-altitude foraging areas become open to them that are closed to their conspecifics; they thrive, reproduce at a greater rate, and the gene for altered hemoglobin spreads further through the gene pool of the species. That sounds like a classic example (owed to Karen Neander, 1995) of a causal chain traced by (...) evolutionary biology. But a view now nearly universal among philosophers maintains that such biological causation is always shadowed, perhaps even rivaled, by causation on a different level.1 That the subgroup of antelopes forages in areas closed to the conspecifics is a state of affairs embodied or realized, notes this view, in certain movements and state changes done by certain physical microparticles—untold billions of microparticles and movements, but a finite and determinate (more on this below) collection nevertheless. That the subgroup reproduces at a greater rate is likewise realized by a huge collection of microparticle movements, a different collection. And the microparticle happenings comprised in the first collection are causally responsible, strictly in accordance with the laws of microphysics, for the microparticle happenings in the second. Biological causation is always shadowed, perhaps even rivaled, by causation on the level of microphysics. The view I mean is general: any case of causing uncovered by any of the special sciences can be recaptured at the level of microphysics. This view is I think what most philosophers mean by “physicalism”; in any case, “physicalism” is the label I shall use. Physicalism comes in two forms. Modest physicalism holds that any causal transaction reported by the special sciences can be retraced by microphysics.2 Hegemonic physicalism holds that retracing such a transaction at the level of.. (shrink)

Since Hume, philosophers of induction have debated the question of whether we have any reason for assuming that nature is uniform. This debate has always presumed that the uniformity hypothesis is itself coherent. In Part 1 of the following I argue that a proper appreciation of Nelson Goodman's so-called grue-green problem1 should lead us to the conclusion that the uniformity hypothesis, under its usual interpretation as a strictly ontological thesis, is incoherent. In Part 2 I argue that further consideration of (...) the grue-green problem leads to the conclusion that certain popular versions of the thesis of physical supervenience/the primacy of physics, under their usual interpretation as strictly ontological theses, are false. In Part 3 I argue that the notions of natural kinds and nature's joints should not be taken as ontologically objective notions but as interest relative. Together Parts 1, 2, and 3 provide support for the Nietzsche-Goodman thesis that philosophers are prone to mistakenly identify as absolute, mind and language independent, features of the world which are in fact only features of a particular discourse, or of the world relative to a particular discourse. (shrink)

The plain man thinks that material objects must certainly exist, since they are evident to the senses. Whatever else may be doubted, it is certain that anything you can bump into must be real; this is the plain man’s metaphysic. This is all very well, but the physicist comes along and shows that you never bump into anything: even when you run your hand along a stone wall, you do not really touch it. When you think you touch a thing, (...) there are certain electrons and protons, forming part of your body, which are attracted and repelled by certain electrons and protons in the thing you think you are touching, but there is no actual contact. … The electrons and protons themselves, however, are only crude first approximations, a way of collecting into a bundle either trains of waves or the statistical probabilities of various different kinds of events. Thus matter has become altogether too ghostly to be used as an adequate stick with which to beat the mind. —Bertrand Russell, “What is the Soul?” 193.. (shrink)

This paper distinguishes three conceptual problems that attend philosophical accounts of consciousness. The first concerns the problem of properly characterizing the nature of consciousness itself, the second is the problem of making intelligible the relation between consciousness and the ‘physical’, and the third is the problem of creating the intellectual space for a shift in philosophical framework that would enable us to deal adequately with the first two problems. It is claimed that physicalism, in both its reductive and non-reductive forms, (...) fails to deal adequately with either the first or second problem. The diagnosis of this failure is connected to the fact that consciousness cannot be treated in its own terms while being simultaneously fitted into an object-based conceptual schema. In light of this, it is proposed that a Bradleian version of absolute idealism may provide a metaphysical and epistemological framework which would enable us to recognize the conceptual diversity required to treat conscious phenomena on their own terms without forcing us to abandon naturalism. (shrink)

to use David Chalmers's jargon) claim that though zombies are conceivable, they are not metaphysically possible. This article calls this position regarding the relation between metaphysical and epistemic modality "modal autonomism," as opposed to the "modal rationalism" endorsed by David Chalmers and Frank Jackson, who insist on a deep link between the two forms of modality. This article argues that the defense of modal rationalism presented in Chalmers and Jackson (2001) begs the question against the type-B materialist/modal autonomist. The argument (...) proceeds as follows. Modal rationalists claim that for all nonphenomenal macro properties, the appropriate supervenience conditional is both necessary and a priori. Hence, type-B materialists must engage in special pleading when they claim that the relevant supervenience conditional for phenomenal properties, expressing the supervenience of the phenomenal on the physical, is necessary but not a priori. However, what Chalmers and Jackson demonstrate, if anything, is that the conditional that includes all the microphysical plus the phenomenal in the antecedent, and nonphenomenal macro facts (such as facts about water and other natural kinds, among other things) in the consequent, is a priori. The question arises why, since facts about water and the like do not metaphysically supervene on the phenomenal facts, is it appropriate to include the phenomenal facts in the antecedent of the relevant supervenience conditional. This article argues for the following claims: First, that it's crucial to the general semantic framework Chalmers and Jackson defend that they do include the phenomenal facts in the supervenience conditional; without them, the conditional would not be a priori. Second, that the only way to argue from the a priori character of these conditionals to the applicability of modal rationalism to the nonphenomenal cases is to rely either on modal rationalism itself or on the denial of type-B materialism. Obviously, in the context of this argument, either way would beg the question. CiteULike Connotea Del.icio.us Digg Reddit Technorati What's this? (shrink)

According to a prominent line of thought, we can be physicalists, but not reductive physicalists, by holding that mental and other ‘higher-level’ or ‘nonbasic’ properties — properties that are not obviously physical properties — are all physically realized. Spelling this out requires an account of realization, an account of what it is for one property to realize another. And while several accounts of realization have been advanced in recent years,1 my interest here is in the ‘subset view,’ which has often (...) been invoked explicitly in defense of nonreductive physicalist positions.2 The subset view holds that property realization consists in the powers of one property having as a subset the powers of another; .. (shrink)

Contemporary Materialism presents an important collection of recent work on materialism in connection with metaphysics, philosophy of language, philosophy of mind and theories of value. This anthology charts the contemporary problems, positions and themes on the topic of materialism. It illuminates materialism's complex intersection with related subjects such as cognition and psychology. By gathering a wide-range of philosophical interventions around the subject of materialism, this anthology provides a valuable discussion of how materialism can effectively serve the purposes of philosophical assessment. (...) To further assist the reader, it also contains an extensive bibliography on contemporary materialism. (shrink)

Arthur Pap’s work played an important role in the development of the analytic tradition. This role goes beyond the merely historical fact that Pap’s views of dispositional and modal concepts were influential. As a sympathetic critic of logical empiricism, Pap, like Quine, saw a deep tension in logical empiricism at its very best in the work of Carnap. But Pap’s critique of Carnap is quite different from Quine’s, and represents the discovery of limits beyond which empiricism cannot go, where there (...) lies nothing other than intuitive knowledge of logic itself. Pap’s arguments for this intuitive knowledge anticipate Etchemendy’s recent critique of the model-theoretic account of logical consequence. Pap’s work also anticipates prominent developments in the contemporary neo-Fregean philosophy of mathematics championed by Wright and Hale. Finally, Pap’s major philosophical preoccupation, the concepts of necessity and possibility, provides distinctive solutions and perspectives on issues of contemporary concern in the metaphysics of modality. In particular, Pap’s account of modality allows us to see the significance of Kripke’s well-known arguments on necessity and apriority in a new light. (shrink)

Phenomenal intentionality is irreducible. Empirical investigation shows it is internally-dependent. So our usual externalist (causal, etc.) theories do not apply here. Internalist views of phenomenal intentionality (e. g. interpretationism) also fail. The resulting primitivist view avoids Papineau's worry that terms for consciousness are highly indeterminate: since conscious properties are extremely natural (despite having unnatural supervenience bases) they are 'reference magnets'.

In this book, Derk Pereboom explores how physicalism might best be formulated and defended against the best anti-physicalist arguments. Two responses to the knowledge and conceivability arguments are set out and developed. The first exploits the open possibility that introspective representations fail to represent mental properties as they are in themselves; specifically, that introspection represents phenomenal properties as having certain characteristic qualitative natures, which these properties might actually lack. The second response draws on the proposal that currently unknown fundamental intrinsic (...) properties provide categorical bases for known physical properties and would also yield an account of consciousness. While there are non-physicalist versions of this position, some are amenable to physicalism. The book's third theme is a defense of a nonreductive account of physicalism. The type of nonreductivism endorsed departs from others in that it rejects all token identity claims for psychological and microphysical entities. The deepest relation between the mental and the microphysical is constitution, where this relation is not to be explicated by the notion of identity. (shrink)

Physicalism is a program for building a unified system of knowledge about the world on the basis of the view that everything is a manifestation of the physical aspects of existence. Jeffrey Poland presents a systematic and comprehensive exploration of the philosophical foundations of this program. He investigates the core ideas, motivating values, and presuppositions of physicalism; the constraints upon an adequate formulation of physicalist doctrine; the epistemological and modal status, the scope, and the methodological roles of physicalist principles. He (...) reviews and evaluates major objections to the program, and considers its significance for philosophy, science, society, and individual persons. He also examines the relations between physicalism and other philosophical positions, such as realism, empiricism, and relativism, and suggests that physicalism is compatible with a tolerant pluralism in the philosophical, cultural, and personal domains. (shrink)

A new direction in philosophy Between 1920 and 1940 logical empiricism reset the direction of philosophy of science and much of the rest of Anglo-American philosophy. It began as a relatively organized movement centered on the Vienna Circle, and like-minded philosophers elsewhere, especially in Berlin. As Europe drifted into the Nazi era, several important figures, especially Carnap and Neurath, also found common ground in their liberal politics and radical social agenda. Together, the logical empiricists set out to reform traditional philosophy (...) with a new set of doctrines more firmly grounded in logic and science. Criticism and decline Because of Nazi persecution, most of the European adherents of logical empiricism moved to the United States in the late 1930s. During the 1940s, many of their most cherished tenets became targets of criticism from outsiders as well as from within their own ranks. Philosophers of science in the late 1950s and 1960s rejected logical empiricism and, starting in the 1970s, presented such alternative programs such as scientific realism with evolutionary epistemology. A resurgence of interest During the early 1980s, philosophers and historians of philosophy began to study logical empiricism as an important movement. Unlike their predecessors in the 1960s-for whom the debate over logical empiricism now seems to have been largely motivated by professional politics-these philosopher no longer have to take positions for or against logical empiricism. The result has been a more balanced view of that movement, its achievements, its failures, and its influence. Hard-to-find core writings now available This collection makes available a selection of the most influential and representative writings of the logical empiricists, important contemporary criticisms of their doctrines, their responses, as well as the recent reappraisals. Introductions to each volume examine the articles in historical context and provide importantbackground information that is vital to a full understanding of the issues discussed. They outline prevalent trends, identifying leading figures and summarize their positions and reasoning, as well as those of opposing thinkers. (shrink)

A new direction in philosophy Between 1920 and 1940 logical empiricism reset the direction of philosophy of science and much of the rest of Anglo-American philosophy. It began as a relatively organized movement centered on the Vienna Circle, and like-minded philosophers elsewhere, especially in Berlin. As Europe drifted into the Nazi era, several important figures, especially Carnap and Neurath, also found common ground in their liberal politics and radical social agenda. Together, the logical empiricists set out to reform traditional philosophy (...) with a new set of doctrines more firmly grounded in logic and science. Criticism and decline Because of Nazi persecution, most of the European adherents of logical empiricism moved to the United States in the late 1930s. During the 1940s, many of their most cherished tenets became targets of criticism from outsiders as well as from within their own ranks. Philosophers of science in the late 1950s and 1960s rejected logical empiricism and, starting in the 1970s, presented such alternative programs such as scientific realism with evolutionary epistemology. A resurgence of interest During the early 1980s, philosophers and historians of philosophy began to study logical empiricism as an important movement. Unlike their predecessors in the 1960s-for whom the debate over logical empiricism now seems to have been largely motivated by professional politics-these philosopher no longer have to take positions for or against logical empiricism. The result has been a more balanced view of that movement, its achievements, its failures, and its influence. Hard-to-find core writings now available This collection makes available a selection of the most influential and representative writings of the logical empiricists, important contemporary criticisms of their doctrines, their responses, as well as the recent reappraisals. Introductions to each volume examine the articles in historical context and provide importantbackground information that is vital to a full understanding of the issues discussed. They outline prevalent trends, identifying leading figures and summarize their positions and reasoning, as well as those of opposing thinkers. (shrink)

A new direction in philosophy Between 1920 and 1940 logical empiricism reset the direction of philosophy of science and much of the rest of Anglo-American philosophy. It began as a relatively organized movement centered on the Vienna Circle, and like-minded philosophers elsewhere, especially in Berlin. As Europe drifted into the Nazi era, several important figures, especially Carnap and Neurath, also found common ground in their liberal politics and radical social agenda. Together, the logical empiricists set out to reform traditional philosophy (...) with a new set of doctrines more firmly grounded in logic and science. Criticism and decline Because of Nazi persecution, most of the European adherents of logical empiricism moved to the United States in the late 1930s. During the 1940s, many of their most cherished tenets became targets of criticism from outsiders as well as from within their own ranks. Philosophers of science in the late 1950s and 1960s rejected logical empiricism and, starting in the 1970s, presented such alternative programs such as scientific realism with evolutionary epistemology. A resurgence of interest During the early 1980s, philosophers and historians of philosophy began to study logical empiricism as an important movement. Unlike their predecessors in the 1960s-for whom the debate over logical empiricism now seems to have been largely motivated by professional politics-these philosopher no longer have to take positions for or against logical empiricism. The result has been a more balanced view of that movement, its achievements, its failures, and its influence. Hard-to-find core writings now available This collection makes available a selection of the most influential and representative writings of the logical empiricists, important contemporary criticisms of their doctrines, their responses, as well as the recent reappraisals. Introductions to each volume examine the articles in historical context and provide importantbackground information that is vital to a full understanding of the issues discussed. They outline prevalent trends, identifying leading figures and summarize their positions and reasoning, as well as those of opposing thinkers. (shrink)

A new direction in philosophy Between 1920 and 1940 logical empiricism reset the direction of philosophy of science and much of the rest of Anglo-American philosophy. It began as a relatively organized movement centered on the Vienna Circle, and like-minded philosophers elsewhere, especially in Berlin. As Europe drifted into the Nazi era, several important figures, especially Carnap and Neurath, also found common ground in their liberal politics and radical social agenda. Together, the logical empiricists set out to reform traditional philosophy (...) with a new set of doctrines more firmly grounded in logic and science. Criticism and decline Because of Nazi persecution, most of the European adherents of logical empiricism moved to the United States in the late 1930s. During the 1940s, many of their most cherished tenets became targets of criticism from outsiders as well as from within their own ranks. Philosophers of science in the late 1950s and 1960s rejected logical empiricism and, starting in the 1970s, presented such alternative programs such as scientific realism with evolutionary epistemology. A resurgence of interest During the early 1980s, philosophers and historians of philosophy began to study logical empiricism as an important movement. Unlike their predecessors in the 1960s-for whom the debate over logical empiricism now seems to have been largely motivated by professional politics-these philosopher no longer have to take positions for or against logical empiricism. The result has been a more balanced view of that movement, its achievements, its failures, and its influence. Hard-to-find core writings now available This collection makes available a selection of the most influential and representative writings of the logical empiricists, important contemporary criticisms of their doctrines, their responses, as well as the recent reappraisals. Introductions to each volume examine the articles in historical context and provide importantbackground information that is vital to a full understanding of the issues discussed. They outline prevalent trends, identifying leading figures and summarize their positions and reasoning, as well as those of opposing thinkers. Available individually by volume. 1. The Emergence of Logical Empiricism (0-8153-2262-3) 432 pages 2. Logical Empiricism at its Peak (0-8153-2263-1) 4243 pages 3. Logic, Probability, and Epistemology (0-8153-2264-X) 424 pages 4. Logical Empiricism and the Special Sciences (0-8153-2265-8) 376 pages 5. Decline and Obsolescence of Logical Empiricsm (0-8153-2266-6) 440 pages 6. The Legacy of the Vienna Circle (0-8153-2267-4) 400 pages. (shrink)

The appearance of this Korean translation of Reality and Reason gives me the opportunity to clarify the purpose of the book and to indicate some of the areas in which my views have developed and altered in the years since it was first written. My primary aim in the book is to explain and defend the realist and materialist view that there is an objective material world of which we can have knowledge. My argument, I have now come to realise, (...) takes a Kantian `transcendental' form. I do not prove these propositions from any more fundamental or indubitable premises, for there are none. Rather, starting from the assumptions that there is a material world and that knowledge of it is possible, I try to show how such knowledge is possible Β what are its necessary conditions Β and what this entails about the nature of subject and object, appearance and reality, and the relations between them. Althusser and Ruben adopt a similar approach, I now see, and I regret my polemic against them on this topic (pp. 9-14). A great deal of traditional epistemology starts from the Cartesian assumption that we have immediate and indubitable knowledge of the contents of subjective consciousness, of appearances; whereas objective reality is something beyond and separate, and related to appearances only contingently. Once a dualistic gulf is created in this way between subject and object, knowledge of the objective world by the subject becomes inexplicable and impossible. The possibility of such knowledge obliges us to reject dualism and assume instead the unity of subject and object, appearance and reality. Reality must not be regarded as a mere `thing-initself' beyond or behind appearances, it is revealed in and through appearances. And appearances are not purely subjective: they are not mere appearances, but always and necessarily the appearances of some aspect of objective reality which is disclosed in and through them.. (shrink)

A new direction in philosophy Between 1920 and 1940 logical empiricism reset the direction of philosophy of science and much of the rest of Anglo-American philosophy. It began as a relatively organized movement centered on the Vienna Circle, and like-minded philosophers elsewhere, especially in Berlin. As Europe drifted into the Nazi era, several important figures, especially Carnap and Neurath, also found common ground in their liberal politics and radical social agenda. Together, the logical empiricists set out to reform traditional philosophy (...) with a new set of doctrines more firmly grounded in logic and science. Criticism and decline Because of Nazi persecution, most of the European adherents of logical empiricism moved to the United States in the late 1930s. During the 1940s, many of their most cherished tenets became targets of criticism from outsiders as well as from within their own ranks. Philosophers of science in the late 1950s and 1960s rejected logical empiricism and, starting in the 1970s, presented such alternative programs such as scientific realism with evolutionary epistemology. A resurgence of interest During the early 1980s, philosophers and historians of philosophy began to study logical empiricism as an important movement. Unlike their predecessors in the 1960s-for whom the debate over logical empiricism now seems to have been largely motivated by professional politics-these philosopher no longer have to take positions for or against logical empiricism. The result has been a more balanced view of that movement, its achievements, its failures, and its influence. Hard-to-find core writings now available This collection makes available a selection of the most influential and representative writings of the logical empiricists, important contemporary criticisms of their doctrines, their responses, as well as the recent reappraisals. Introductions to each volume examine the articles in historical context and provide importantbackground information that is vital to a full understanding of the issues discussed. They outline prevalent trends, identifying leading figures and summarize their positions and reasoning, as well as those of opposing thinkers. (shrink)

'The church in danger' : latitudinarians, Socinians, and Hobbists -- Animal spirits and living fibres -- Mortalists and materialists -- Journalism, exile, and clandestinity -- Mid-eighteenth-century materialism -- Epilogue : some consequences.

Chapter INTRODUCTION: OTTO NEURATH, THE VIENNA CIRCLE AND THE PROTOCOL SENTENCE DEBATE Everybody familiar with contemporary analytical philosophy is likely ...

If there is a movement or school that epitomizes analytic philosophy in the middle of the twentieth century, it is logical empiricism. Logical empiricists created a scientifically and technically informed philosophy of science, established mathematical logic as a topic in and tool for philosophy, and initiated the project of formal semantics. Accounts of analytic philosophy written in the middle of the twentieth century gave logical empiricism a central place in the project. The second wave of interpretative accounts was constructed to (...) show how philosophy should progress, or had progressed, beyond logical empiricism. The essays survey the formative stages of logical empiricism in central Europe and its acculturation in North America, discussing its main topics, and achievements and failures, in different areas of philosophy of science, and assessing its influence on philosophy, past, present, and future. (shrink)

This paper addresses two objections raised against anomalous monism. Firstly, on the basis of Davidson's assertion that all causal relations fall under strict laws, many critics conclude mental properties are causally inert since they are non-nomic. I argue that this conclusion follows only on the further assumption that all causally efficacious properties are nomic properties. It is perfectly consistent, however, to hold that there is a law covering each causal relation without each causal statement being the instantiation of a law. (...) Secondly, I countervail Kim's claim that the only option open to physicalists is reductionism by showing how weak supervenience preserves both the dependence of the mental on the physical and the irreducibility of mental explanations to physical ones. (shrink)

Keywords: action, dualism, functionalism, materialism, physicalism Contents 1. What is mental causation? 2. History 3. Mental causation as a problem for dualism 4. Mental causation as a problem for physicalism 5. Mental causation and cognitive science..

Un uomo in cappa e cilindro di fronte a voi promette: “muoverò la materia con la sola forza del pensiero”. Scettici aspettate la prova. Ed ecco che, mirabilmente, egli alza un braccio. Un braccio, il suo braccio! Un pezzo di materia, dotato di massa, carica elettrica, proprietà magnetiche e quant’altro, si è mosso solo grazie alla sua volontà di alzarlo. Con la sola forza del pensiero il braccio si è sollevato! Per quanti sforzi retorici faccia, nessuno riterrà particolarmente sorprendente l’esperimento. (...) Il fatto è che diamo per scontato che la materia possa essere mossa con la sola forza del pensiero se quella materia siamo noi. I viaggi nel tempo, o il trasferimento istantaneo di informazioni, quelli sì sarebbero davvero una sorpresa. Eppure, mentre per questi si sono in un certo senso raggiunti risultati teorici o sperimentali interessanti, ed esistono teorie che spiegano in base a quali leggi fisiche questi fenomeni possano avvenire, per quanto riguarda la nostra capacità di agire intenzionalmente ci troviamo ancora sommersi da difficoltà teoriche enormi, e il terreno rimane ancora pieno di difficoltà concettuali. Uno dei problemi più cruciali è che entrambe le opzioni metafisiche generali, il monismo e il dualismo, sono radicate nel senso comune come nella nostra tradizione culturale, e talvolta in modi davvero curiosi. Possiamo trovare richiami teologici al monismo, mentre sarebbe ragionevole pensare a una adesione esclusivo a una forma di dualismo, e derive dualiste nelle indagini di neurofisiologi contemporanei. Come esempio del primo caso voglio menzionare la procedura di pesatura delle anime che si può veder raffigurata in alcune chiese (la Cattedrale di Torcello e San Pietro a Spoleto) e che si basa sull’idea che le proprietà etiche degli individui siano riscontrabili nelle proprietà fisiche, il peso delle loro anime. Certo, si può pensare che le bilance per anime siano in effetti sensibili a proprietà non fisiche, nondimeno esse parteciperebbero di una struttura nomologica tipica delle scienze fisiche, di contro a quanto solitamente segna il confine tra regno della natura – nomologico - e regno della mente - normativo. Di contro, un recente numero di Nature (luglio 2006) apriva con un richiamo a caratteri cubitali in copertina: Trasformare il pensiero in azione [Turning thought into action]. L’uso del verbo “trasformare” dà adito all’idea che le proprietà di un dominio siano state cambiate e modificate così da divenire proprietà di un dominio diverso. Ma come notavo in apertura, non c’è nulla di sorprendente nell’idea che i nostri pensieri diventino azioni, e dobbiamo pensarla proprio così se vogliamo giustificare l’idea che le nostre azioni siano nostre, ossia risultato dei nostri atti deliberativi. In questo lavoro cercherò di offrire una risposta al problema della causalità mentale, ossia a come la nostra mente possa interagire con gli eventi del mondo fisico e da essi esserne modificata. Un problema classico, quindi assai vasto, sia per ciò che attiene la letteratura sia per quanto riguarda le questioni da affrontare. La bussola adottata è stata la seguente: se il problema è il rapporto del mentale con il mondo fisico allora va tenuto nel massimo rispetto il modo in cui il problema generale della causalità è stato affrontato entro il mondo fisico. La mia impressione è che nella letteratura filosofica non venga dedicata una sufficiente attenzione a questo aspetto, e uno degli intenti che perseguirò sarà porvi rimedio. Il libro è diviso in quattro capitoli. Nel primo si evidenziano le radici del problema mente corpo da un punto di vista più concettuale che storico. I due domini sono sempre stati tratteggiati tramite proprietà all’apparenza differenti, così da rinforzare la ragionevolezza di un approccio più o meno dualista. Emerge già qui che il problema, nella specifica declinazione causale nella quale viene qui considerato, diventa tale solo se si assume un modello di causalità adeguato alle discipline fisiche, anche se assai più controverso negli altri casi. Questo modello era nelle pagine di Leibniz, e costituiva la sua schiacciante obiezione a Descartes. Tuttavia, nell’attuale dibattito non sempre ha giocato un ruolo altrettanto cruciale. Penso sia il tempo di rimetterlo al centro della scena. Sosterrò quindi che in effetti il problema della causalità mentale e del generale rapporto tra mente e corpo è una conseguenza, piuttosto che il punto d’avvio, di un modello generale di causalità. Tale modello è da identificarsi nella teoria secondo la quale tra causa ed effetto c’è un trasferimento di una quantità conservata, una teoria sulla quale si è acceso un intenso dibattito. Nel capitolo successivo il modello di causalità fisica del trasferimento viene combinato col più generale approccio fisicalista che in questi anni si sta diffondendo. Ci sono modi assai diversi per caratterizzare il fisicalismo, che comportano conseguenze molto divergenti tra loro. Analizzerò diverse varietà di fisicalismo e la loro compatibilità sia con il modello della causalità come trasferimento, cui si faceva riferimento, sia con il dominio del mentale. Sosterrò che il principio metafisico della chiusura causale del mondo fisico può essere integrato con la visione della causalità difesa nel primo capitolo, il tutto accettando l’idea che la causalità sia una relazione tra eventi. L’ipotesi è che sussista uno spazio di manovra per la causalità mentale a condizione che le proprietà mentali, elementi cardine della relazione causale, siano identificate con le proprietà fisiche, una teoria oggi non più di gran moda. Il terzo capitolo è dedicato alla difesa della teoria dell’identità dei tipi dalle due note obiezioni: la teoria delle identità necessarie di Kripke e l’argomento della realizzabilità multipla nelle sue diverse varianti. La strada per rispondere alle obiezioni e difendere la teoria dell’identità passa attraverso una teoria delle sensazioni che metta in luce il carattere intrinsecamente causale e, in certa misura, esternistico di questi stati, combattendo così l’intuizione che le sensazioni si risolvano nelle proprietà fenomeniche di tipo qualitativo, nel cosa si prova ad averle. A supporto di questa visione verranno schierate anche un certo numero di prove empiriche, facenti capo alla letteratura medica. Nondimeno, la tesi di identità richiede che essa sia condizionata, ossia che venga vincolata a condizioni locali, un tema perseguito nell’ultimo capitolo. Il quarto capitolo è dedicato a mostrare che non c’è un’enorme distanza tra la teoria dell’identità e il funzionalismo nella sua versione di primo ordine. In questo contesto giocano un ruolo chiave i generi naturali, che soddisfano i requisiti per una teoria dell’identità senza per questo condurla nelle maglie delle critiche che l’hanno condannata. Così costruita, la teoria dell’identità è il portato dell’incontro tra analisi concettuale e ricerca empirica e un simile connubio ha tra le sue conseguenze l’abbandono dell’immagine per cui la realtà è costituita da diversi strati ontologici di complessità crescente. Di contro, l’incontro tra il piano concettuale e quello empirico che porta all’identità consente di accordare pieni poteri causali alle proprietà mentali, un desiderata al quale non è possibile rinunciare. Solo che esse vanno individuate nel mondo fisico, senza che ciò comporti la rinuncia alla forza epistemica ed esplicativa delle medesime. Alcuni possono vedere in questa posizione un’abdicazione della filosofia alla scienza. Non credo che sia compito della filosofia avocarsi regioni del sapere. Se è la scienza a dovere risolvere il problema della causalità mentale, la filosofia non può mettersi di traverso. A quest’ultima spetterà il compito di mostrare che la distanza tra le nostre intuizioni, per quanto fallimentari e confuse siano, e le descrizioni scientifiche è colmabile da una ricerca comprensibile e razionale. Frutto comunque delle nostre intuizioni. (shrink)

I argue that the completeness of physics is composed of two distinct claims. The first is the commonly made claim that, roughly, every physical event is completely causally determined by physical events. The second has rarely, if ever, been explicitly stated in the literature and is the claim that microphysics provides a complete inventory of the fundamental categories that constitute both the causal features and intrinsic nature of all the events that causally affect the physical universe. After showing that these (...) claims are distinct, I argue that they can be used to solve a difficulty with existing responses to the exclusion problem—namely, that these existing responses also undermine the powerful causal argument for physicalism. Recognizing that there are two kinds of completeness opens up room for the nonreductive physicalist to solve the exclusion problem while also endorsing a modified, cogent causal argument for a kind of physicalism compatible with her position. (shrink)

Causal closure arguments against interactionist dualism are currently popular amongst physicalists. Such an argument appeals to some principles of the causal closure of the physical, together with certain other premises, to conclude that at least some mental events are identical with physical events. However, it is crucial to the success of any such argument that the physical causal closure principle to which it appeals is neither too strong nor too weak by certain standards. In this paper, it is argued that (...) various forms of naturalistic dualism, of an emergentist character, are consistent with the strongest physical causal closure principles that can plausibly be advocated. (shrink)

My aim in this paper is to defend a version of the brain process theory, or identity thesis, which differs in one important respect from the theory put forward by J.J.C. Smart. I shall argue that although the sensations which a person experiences are, as a matter of contingent fact, brain processes, nonetheless there are facts about sensations which cannot be described or understood in terms of any physical theory. These 'mental' facts cannot be described by physics for the simple (...) reason that physical descriptions are designed specifically to avoid mentioning such facts. Thus in giving a physical explanation of a sensation we necessarily describe and render intelligible that sensation only as a physical process, and not also as a sensation. If we are to describe and render intelligible a person's sensations, or inner experiences, as sensations, and not as physical processes occurring in that person's brain, then we must employ a kind of description that connot be derived from any set of physical statements. (shrink)

The paper takes issue with a widely accepted view of mental causation. This is the view that mental causation is either reducible to physical causation or ultimately untenable, because incompatible with the causal completeness of physics. The paper examines, first, why recent attempts to save the phenomena of mental causation by way of the notion of supervenient causation fail. The result of this examination is the claim that any attempted specification of the most basic causal factors which supposedly underlie a (...) causal transaction cannot account for the counterfactually necessary connections with the effect in question. By contrast, the specification of these factors at a higher-level would allow establishing such connections. The paper closes with a discussion of how this view of autonomous ligher-level causation grounded on counterfactual relations can be made compatible with the physicalistic commitment to a complete specification of the particular causes of any physical effect exclusively in physical terms. (shrink)

In this paper I argue that causation is an essentially macroscopic phenomenon, and that mental causes are therefore capable of outcompeting their more specific physical realizers as causes of physical effects. But I also argue that any causes must be type-identical with physical properties, on pain of positing inexplicable physical conspiracies. I therefore allow macroscopic mental causation, but only when it is physically reducible.

E.J. Lowe has recently proposed a model of mental causation on which mental events are emergent, thus exerting a novel, downward causal influence on physical events. Yet on Lowe's model, mental causation is at the same time empirically undetectable, and in this sense is "invisible". Lowe's model is ingenious, but I don't think emergentists should welcome it, for it seems to me that a primary virtue of emergentism is its bold empirical prediction about the long-term results of human physiology. Here (...) I'll try to restore emergentism's empirical status, but my broader aim is to use Lowe's model to explore some central topics in the mental causation debate, including the "causal closure" of the physical world and the nature of causal powers. (shrink)

The paper begins with a restatement of Chalmers's "hard problem of consciousness". It is suggested that an interactionist approach is one of the possible solutions of this problem. Some fresh arguments against the identity theory and epiphenomenalism as main rivals of interactionism are developed. One of these arguments has among its colloraries a denial of local supervenience, although not of the causal closure principle. As a result of these considerations a version of "local interactionism" (compatible with causal closure) is proposed.

According to an increasing number of authors, the best, if not the only, argument in favour of physicalism is the so-called 'overdetermination argument'. This argument, if sound, establishes that all the entities that enter into causal interactions with the physical world are physical. One key premise in the overdetermination argument is the principle of the causal closure of the physical world, said to be supported by contemporary physics. In this paper, I examine various ways in which physics may support the (...) principle, either as a methodological guide or as depending on some other laws and principles of physics. (shrink)