Physicalism is the thesis that everything is physical, or as contemporary philosophers sometimes put it, that everything supervenes on, or is necessitated by, the physical. The thesis is usually intended as a metaphysical thesis, parallel to the thesis attributed to the ancient Greek philosopher Thales, that everything is water, or the idealism of the 18th Century philosopher Berkeley, that everything is mental. The general idea is that the nature of the actual world (i.e. the universe and everything in it) conforms (...) to a certain condition, the condition of being physical. Of course, physicalists don't deny that the world might contain many items that at first glance don't seem physical — items of a biological, or psychological, or moral, or social nature. But they insist nevertheless that at the end of the day such items are either physical or supervene on the physical. (shrink)

The overall contention of this paper, conducted through an examination of the idea of a ‘critical direct realism’ as this was developed across the twentieth century first in the thought of Roy Wood Sellars (1880–1973) and then in a different form by his son Wilfrid Sellars (1912–1989), is that such a view, in both its conceptual and sensory representational dimensions, is plausible as a form of direct realism. However, to the extent that the mediating sensory or qualitative dimension was itself (...) conceived by both thinkers in what I characterize as strongly ‘phenomenal realist’ terms, the resulting philosophical commitments were of a kind that most current direct realists would generally not accept, even in cases where they themselves are phenomenal realists (perhaps naïve realists). The various perceiver-dependent forms of that additional, perhaps detachable commitment of most critical realists is likely responsible for the assessment of William Pepperell Montague (1873–1953) and other ‘neo-realists’ that ‘critical realism’ is not really, as advertised by Roy Wood Sellars, a version of direct realism, but ultimately a retreat to indirect realism. However, I argue that in both of its primary conceptual and sensory representational commitments, ‘critical direct realism’ remains a plausible competitor to direct acquaintance versions of direct realism. (shrink)

CONTEMPORARY MATERIALIST theories of mind, viz. Causal Correspondence and Identity, are usually contrasted with several alleged historical competitors: Parallelism; Epiphenomenalism; Dual-aspect; and Emergence. What I shall here attempt to argue is that this last-mentioned theory, Emergence, is no competitor at all, but rather is a natural supplement to a materialist theory. I shall try to argue that there is a good case for saying that if, in particular, sensation-states are caused by or are identical to brain-states, then they are caused (...) by or are identical to emergent brain-states. (shrink)

This paper concerns the question of how to specify what is to count as physical for the purposes of debates concerning either physicalism or the completeness of physics. I argue that what is needed from an account of the physical depends primarily on the particular issue at stake, and that the demand for a general a priori specification of the physical is misplaced. A number of attempts to say what should be counted as physical are defended from recent attacks by (...) Chris Daly, and a specific proposal due to David Papineau developed and extended. I argue that this approach is more than suitable for the debates for which it is intended. (shrink)

. An attempt is made to identify a concept of ‘downward causation’ that will fit the claims of some recent writers and apply to interesting cases in biology and cognitive theory, but not to trivial cases. After noting some difficulties in achieving this task, it is proposed that in interesting cases commonly used to illustrate ‘downward causation’, (a) regularities hold between multiply realizable properties and (b) the explanation of the parallel regularity at the level of the realizing properties is non-trivial. (...) It is argued that the relation between a realizable property and the property that realizes its effect in a particular case is not usefully regarded as a species of causation and that use of the concept of downward causation deflects our attention from our central explanatory tasks. (shrink)

Wilfrid Sellars has proposed a materialist account of sensation which relies in part on the postulation of special kinds of individuals. This postulational strategy appears to be analogous to the one that introduces such entities as electrons. After setting out Sellars' account, I focus on his application of the postulational strategy. I argue that this application requires the discovery of new effects for familiar properties; that this kind of discovery is disanalogous to what postulation usually does; and that this kind (...) of discovery cannot really be arrived at by postulation. I conclude that Sellars has not provided a successful, materialist account of sensation. (shrink)

Robert Nozick (1993) has offered an evolutionary account of self-evident beliefs that comes into conflict with a "mild realist" (Dennett, 1991a) view of beliefs. This chapter summarizes both views, and explains the conflict. Emergence is examined. Mild realism is found to embrace "emergence" in an acceptable sense, and to eschew it in its problematic sense. Nozick's cases of self-evident beliefs are examined and difficulties in his account are explained. An alternative approach is developed that avoids the difficulties in Nozick's account (...) and is compatible with mild realism. Implications of mild realism for concepts are drawn. (shrink)

A critical re-examination of the history of the concepts of space (including spacetime of general relativity and relativistic quantum field theory) reveals a basic ontological elusiveness of spatial extension, while, at the same time, highlighting the fact that its epistemic primacy seems to be unavoidably imposed on us (as stated by A.Einstein “giving up the extensional continuum … is like to breathe in airless space”). On the other hand, Planck’s discovery of the atomization of action leads to the fundamental recognition (...) of an ontology of non-spatial, abstract entities (Quine) for the quantum level of reality (QT), as distinguished from the necessarily spatio-temporal, experimental revelations (measurements). The elementary quantum act (measured by Planck’s constant) has neither duration nor extension, and any genuinely quantum process literally does not belong in the Raum and time of our experience. As Heisenberg stresses: “Während also die klassische Physik ein objectives Geschehen in Raum and Zeit zum Gegenstand hat, für dessen Existenz seine Beobachtung völlig irrelevant war, behandelt die Quantentheorie Vorgänge, die sozusagen nur in den Momenten der Beobachtung als raumzeitliche Phänomene aufleuchten, und über die in der zwischenzeit anschaulische physikalische Aussagen sinloss sind”. An admittedly speculative, hazardous conjecture is then advanced concerning the relation of such quantum ontology with the role of the pre-phenomenal continuum (Husserl) in the perception of macroscopically distinguishable objects in the Raum and time of our experience. Although rather venturesome, it brings together important philosophical issues. Coherently with recent general results in works on the foundations of QT, it is assumed that the linearity of quantum dynamical evolution does not apply to the central nervous system of living beings at a certain level of the evolutionary ramification and at the pre-conscious stage of subjectivity. Accordingly, corresponding to the onset of a non-linear dynamic evolution, a ‘primary spatial’ reduction is ‘continually’ taking place, thereby constituting the neural precondition for the experience of distinguishable macroscopic objects in the continuous spatial extension. While preventing the theoretically possible quantum superpositions of macroscopic objects from being perceivable by living beings, the ‘primary reduction’ has no effect on the standard processes concerning quantum level entities involved in laboratory man-made experiments. In this connection, an experimental check which might falsify the conjecture is briefly discussed. The approach suggested here, if sound, leads to a naturalization of that part of Kant’s Transcendental Aesthetics than can survive the Euclidean catastrophe. According to such naturalized transcendentalism, “space can well be transcendental without the axioms being so”, in agreement with a well-known statement by Boltzman. Finally, as far as QT is concerned, the conjecture entails that a scheme for quantum measurement of the von Neumann type cannot even ‘leave the ground’, vindicating Bohr’s viewpoint. A quantum theory of measurement, in a proper sense, turns out to be unnecessary and in fact impossible. (shrink)

(2014). Emergence, Story, and the Challenge of Positive Scenarios. World Futures: Vol. 70, Strategy, Story, and Emergence: Essays on Scenario Planning, pp. 52-87.

Individualism and collectivism serve in the field of sociological theories as complementary principles of the formation of concepts and hypotheses. This paper attempts to show that the methodological forms of i. and c., as distinguished from the more ideological traditional forms, may be differentiated, according to whether they are intended as ontological, meaning-theoretical or explanation-theoretical, as well as according to whether they are presented in a more dogmatic or more qualified form. Out of the combination of these various aspects arises (...) a multiplicity of positions dissolving the traditionally accepted opposition between individualism and collectivism. (shrink)

It is widely thought that mind–body substance dualism is implausible at best, though mere “property” dualism is defensible and even flourishing. This paper argues that substance dualism is no less plausible than property dualism and even has two advantages over it.

The paper addresses a problem for the unification of quantum physics with the new Aristotelianism: the identification of the members of the category of substance. I outline briefly the role that substance plays in Aristotelian metaphysics, leading to the postulating of the Tiling Constraint. I then turn to the question of which entities in quantum physics can qualify as Aristotelian substances. I offer an answer: the theory of thermal substances, and I construct a fivefold case for thermal substances, based on (...) the irreversibility of time, the definition of thermodynamic concepts, spontaneous symmetry breaking, phase transitions, and chemical form. (shrink)

I physicalism 1 and the weak identity theory deny, while physicalism 2 and the radical identity theory assert, that raw feels can be accomodated in a purely physicalistic framework. II A way of interpreting the claim of physicalism 1 is that raw feels are emergents. III The doctrine of emergence asserts that: there are different levels of existence, these levels of existence are distinguishable on the basis of the behaviour of entities of that level, and an adequate scientific explanation of (...) a lower level is inadequate for a higher level. IV The criteria of emergence are novelty and a priori unpredictability. V Either qualities or laws or both may be regarded as emergents. VI If the alleged impossibility of explaining higher level phenomena on the basis of explanation adequate for lower level phenomena is logical, then the impossibility is either trivial or it implies indeterminism. Consideration of theories of emergence: VII Semantic emergence. On this view emergence is theory-bound, analogous to indefinability or indemonstrability. VIII Methodological emergence. On this view what we regard as emergents depends on the theory we construct. IX Nomological emergence. On this view emergence is an empirical problem. Conclusion: if there are emergents, physicalism 2 and the radical identity theory probably have to be abandoned. However, unless actual examples of emergents are produced both theories hold. The logical possibility of falsification is not an objection against physicalism 2 and the radical identity theory; it is one of their merits. (shrink)

Frank Jackson formulated his knowledge argument as an argument for dualism. In this paper I show how the argument can be modified to also establish the irreducibility of the secondary qualities to the properties of physical theory, and ultimately "secondary quality eliminativism"- the view that the secondary qualities are physically uninstantiated.

Critical attention to Wilfrid Sellars’s “Philosophy and the Scientific Image of Man” (PSIM) has focused on the dubious Peircean optimism about scientific convergence that underwrites Sellars’s talk of “the” scientific image. Sellars’s ultimate Peircean ontology has led Willem deVries, for instance, to accuse him of being a naturalistic “monistic visionary.” But this complaint of monism misplays the status of the ideal end of science in Sellars’s thinking. I propose a novel reading of PSIM, foregrounding its opening methodological reflections. On this (...) reading, the central point of the paper is to accuse figures like Wittgenstein and Strawson, whom I call “analytical quietists,” of taking the unity of intellectual endeavor as somehow given. Such unity as is forthcoming is, Sellars tells us, a task. I conclude by noting that a structurally similar accusation of too easily presumed unity emerges at the end of the paper, against a familiar sort of anti-relativistic moral theorizing. Thus, Sellars’s conception of the task of philosophy is, at least potentially, a point of surprising ethico-political significance as well. (shrink)

Amidst the progress being made in the various (sub-)disciplines of the behavioural and brain sciences a somewhat neglected subject is the problem of how everything fits into one world and, derivatively, how the relation between different levels of discourse should be understood and to what extent different levels, domains, approaches, or disciplines are autonomous or dependent. In this paper I critically review the most recent proposals to specify the nature of interdiscourse relations, focusing on the concept of supervenience. Ideally supervenience (...) is a relation between different discourses which has all the advantages of reduction, but without its disadvantages. I apply the more abstract considerations to two concrete cases: schizophrenia and colour. Usually an interlevel or interdiscourse relation is seen as asymmetrical: the overlaying discourse depends on the underlying discourse (and not vice versa), where the out- or un-spoken assumption is that the ultimate underlying discourse is physical. Instead I argue that scientific categories referred to in interdiscourse relations are, ultimately, dependent on common sense categories and common sense normative criteria. It is the manifest categories and common sense ideas about what is reasonable and what is right that determine the relevant categorisations at the deeper, underlying levels. I suggest that the implications of this are not merely methodological or epistemological. (shrink)

Some claim that the notion of strong emergence as involving ontological or causal novelty makes no sense, on grounds that any purportedly strongly emergent features or associated powers 'collapse', one way or another, into the lower-level base features upon which they depend. Here we argue that there are several independently motivated and defensible means of preventing the collapse of strongly emergent features or powers into their lower-level bases, as directed against a conception of strongly emergent features as having fundamentally novel (...) powers. After introducing the project (Section 1), we motivate and present the powers-based account (Section 2); we then canvass the two main versions of the collapse objection, show how these apply to the powers-based account, and problematize certain strategies of response (Section 3); we then present and defend four better strategies of response (Section 4). (shrink)

Jaegwon Kim, and others, have recently posed a powerful challenge to both emergentism and nom-reductive physicalism by providing arguments that these positions are committed to an untenable combination of both ‘upward’ and ‘dounward’ determination. In section 1, I illuminate how the nature of the realization relation underlies such skeptical arguments However, in section 2, I suggest that such conclusions involve a confusion between the implications of physicalism and those of a related thesis the ‘Completeness of Physics' (Co?) I show that (...) the truth of CoP poses a very serious obstacle to realized properties being efficacious in a physicalist universe and suggest that abandoning CoP offers hope for defending non-reductive physicalism. I then formulate a schema for a physicalist metaphysics, in section 3, which rejects CoP. This scenario is one where microphysical properties have a few conditional powers that they contribute to individuals when they realize certain properties In such a situation, I argue, though physicalism holds true there is still plausibly both ‘upward’ and ‘downward’ determination, where the latter is crucially an underappreciated form of determination I temn 'non- causal'. Ultimately, I conclude that this metaphysical schema offers a coherent account of Strongly emergent properties that preserves the truth of NRP albeit, in a form that is purged of any commitment to CoP. Finally, in section: 4, I carefully explore which of Kim's assumptions and arguments this metaphysics undermines. (shrink)

The present work is focussed on the completeness of physics, or what is here called the Completeness Thesis: the claim that the domain of the physical is causally closed. Two major questions are tackled: How best is the Completeness Thesis to be formulated? What can be said in defence of the Completeness Thesis? My principal conclusions are that the Completeness Thesis can be coherently formulated, and that the evidence in favour if it significantly outweighs that against it. In opposition to (...) those who argue that formulation is impossible because no account of what is to count as physical can be provided, I argue that as long as the purpose of the argument in which the account is to be used are borne in mind there are no significant difficulties. The account of the physical which I develop holds as physical whatever is needed to fix the likelihood of pre-theoretically given physical effects, and hypothesises in addition that no chemical, biological or psychological factors will be needed in this way. The thus formulated Completeness Thesis is coherent, and has significant empirical content. In opposition to those who defend the doctrine of emergentism by means of philosophical arguments I contend that those arguments are flawed, setting up misleading dichotomies between needlessly attenuated alternatives and assuming the truth of what is to be proved. Against those who defend emergentism by appeal to the evidence, I argue that the history of science since the nineteenth century shows clearly that the empirical credentials of the view that the world is causally closed at the level of a small number of purely physical forces and types of energy is stronger than ever, and the credentials of emergentism correspondingly weaker. In opposition to those who argue that difficulties with reductionism point to the implausibility of the Completeness Thesis I argue that completeness in no way entails the kinds of reductionism which give rise to the difficulties in question. I argue further that the truth of the Completeness Thesis is in fact compatible with a great deal of taxonomic disorder and the impossibility of any general reduction of non-fundamental descriptions to fundamental ones. In opposition to those who argue that the epistemological credentials of fundamental physical laws are poor, and that those laws should in fact be seen as false, I contend that truth preserving accounts of fundamental laws can be developed. Developing such an account, I test it by considering cases of the composition of forces and causes, where what takes place is different to what is predicted by reference to any single law, and argue that viewing laws as tendencies allows their truth to be preserved, and sense to be made of both the experimental discovery of laws, and the fact that composition enables accurate prediction in at least some cases. (shrink)

A substantial guide providing an overview of both physicalism and metaphysical naturalism, reviewing both questions of formulation and justification for both doctrines. Includes a diagnostic strategy for understanding talk of naturalism as a metaphysical thesis.