Causal Closure of the Physical

Among the arguments that have been proposed for physicalism, the “causal argument” is widely taken to be the most compelling. Justin Tiehen (2015) has raised an interesting objection to this argument that takes the form of a dilemma. Tiehen’s ultimate conclusion is that at best, the causal argument is circular and so its premises cannot provide support for its conclusion, physicalism. The aim of the present paper is to respond to Tiehen’s objection in order to provide a defense of the (...) causal argument. (shrink)

The non-reductive physicalist would like to believe that mental properties are not identical to physical properties; that there are complete causal explanations of all events in terms of physical properties; and that there are sometimes explanations of events in terms of mental properties. However, some have argued that these claims cannot all be true, since they are collectively inconsistent with a principle of causal exclusion. In this paper I argue that the best formulation of the interventionist theory of causation entails (...) the falsity of the exclusion principle. However, I argue that it does so at the cost of revealing a weakness in the interventionist theory itself. (shrink)

The causal closure of the physical poses a familiar causal exclusion problem for the special sciences that stems from the idea that if closure is true, then fundamental physical properties do all the causal work involved in bringing about physical effects. In this paper I aim to show that the strongest causal closure principle that is not ruled out by some simple physics in fact allows for a certain kind of downward causation, which in turn makes room for robust special (...) science autonomy. I focus on the case of vector composition, arguing that it involves irreducibly multilevel causation. To give a complete causal explanation of what goes on in cases that involve the effects of multiple forces, we need to appeal not only to the fundamental properties that generate those forces, but also to geometric properties that determine how multiple vectors compose. However, if all the causal work involved in such cases were due to fundamental physical properties, there would be a one-level explanation available. Hence, I argue, it cannot be the case that fundamental physical properties do all the causal work. The extra causal work, I suggest, comes from the fact that the causal powers bestowed by fundamental physical properties have irreducibly geometric manifestation conditions. I defend the resulting form of downward causation as a solution to the problem of special science autonomy, and discuss two potential accounts of its source, in terms of the debate between kinematic and dynamic theories of the origins of spacetime symmetries. (shrink)

The article discusses Philip Goff’s latest projects of developing panpsychist research program as one that is capable of revealing the place of consciousness in the physical world and accounting for the intrinsic nature of physical reality, while avoiding the problem of the causal closure of the physical that is supposed to be pernicious for psychophysical dualism. The case is made that on the one hand, dualism has pretty good resources to meet the inductive no-gap objection appealing to the causal closure, (...) while on the other hand, insofar as this objection has some force, panpsychism in the forms discussed in Goff’s book Galileo’s Error (Goff, P. 2019. Galileo’s Error: Foundations for a New Science of Consciousness. New York: Pantheon Books) faces nearly the same difficulties and its capability of overcoming these difficulties is problematic. While the hybrid cosmopsychism, as developed in Goff’s later manuscript, circumvents the causal closure problem, it does so at the price of relying on assumptions that are hardly intelligible. (shrink)

Setting aside all exclusion-style worries about the redundancy of postulating additional, non-physical mental causes for effects that can already be explained in purely physical terms, dualists who treat mental properties as supervening on physical properties still face a further problem: in cases of mental-to-mental causation, they cannot avoid positing an implausibly coincidental coordination in the timing of the distinct causal processes terminating, respectively, in the mental effect and its physical base. I argue that this problem arises regardless of whether one (...) treats the mental cause as causing both the mental effect and its physical base, or whether one treats the latter as having instead been caused by some physical state, and that the problem also does not depend on which theory of causation one adopts. A third option of treating the mental cause and its physical base as producing the mental effect and its physical base by a single causal process that they both contribute to is found to come up short as well. (shrink)

In their paper “Should Methodological Naturalists Commit to Metaphysical Naturalism?” Zargar et al. try to show that the correct answer to the question that the title of their paper poses is positive. They argue that methodological naturalism has a metaphysical presupposition, namely causal closure, and an epistemological consequence, namely evidentialism. Causal closure and evidentialism imply metaphysical naturalism. Thus, they conclude, one who believes in methodological naturalism should also endorse causal closure, evidentialism, and metaphysical naturalism as a result. In this paper, (...) I criticize their argument and argue that it is deficient in (at least) two different ways. First, what they consider to be methodological naturalism is in fact a strawman: that is another – more radical – thesis that may be called methodological anti-supernaturalism. Second, and most importantly, even methodological anti-supernaturalism does not in essence need causal closure for its justification. Then, methodological naturalists are not required to adhere to causal closure or metaphysical naturalism. (shrink)

Lo scopo dell’elaborato è presentare il problema della causalità del mentale e cercare di dare una soluzione fisicalista al problema che possa includere anche i qualia, da sempre considerati come l’ultima difesa a favore dell’irriducibilità della mente al fisico. Il primo capitolo ha il compito di trovare la teoria metafisica del mentale migliore che riesca sia a rendere conto della causalità del mentale e sia a resistere all’argomento di Kim. Dopo aver esposto in dettaglio l’argomento di Kim sono affrontati i (...) limiti della teoria dell’identità di tipo, in particolare viene esposta la critica di Hilary Putnam conosciuta come “realizzabilità multipla”. Come alternativa all’identità di tipo sono state analizzate le due principali varianti del funzionalismo, ovvero quello del ruolo e quello dell’occupante, e infine quest’ultimo è risultato avere maggiori vantaggi teorici. Sono stati esposti i problemi del funzionalismo e in particolare il problema dell’incapacità del linguaggio funzionalista di rendere conto dei qualia. A tal proposito è stato esposto l’argomento del “cervello-cinese” di Ned Block e ne sono stati individuati i limiti mostrando che la conclusione dell’argomento non può essere data per scontata. Per quest’ultimo motivo è stato elaborato un esperimento mentale volto a mostrare l’incapacità del linguaggio fisicalista nel descrivere qualia, e ne sono stati mostrati i vantaggi teorici rispetto all’esperimento mentale di Block; anche se un cervello-cinese presentasse qualia, un linguaggio funzionalista non potrebbe descriverli. Nel secondo capitolo è esposto il problema del “gap esplicativo” elaborato da Levine, utilizzato spesso a supporto di posizioni non riduzioniste. È stato esposto e analizzato l’esperimento mentale degli “zombie filosofici” di David Chalmers volto a dimostrare che i qualia non sono riducibili a qualcosa di fisico. È stato poi elaborato un altro esperimento mentale volto a mostrare che almeno intuitivamente, i qualia sembrano essere necessari per il darsi di alcuni comportamenti umani e che se l’esperimento mentale degli zombie prevede l’assenza di qualia allora la fisica di quel mondo dovrebbe essere in grado di predeterminare tutti i comportamenti degli zombie. Si è mostrato che così facendo si ammetterebbe la concepibilità di un mondo-zombie fisicamente predeterminato, e dunque anche la possibilità metafisica. È stata analizzata questa intuizione attraverso un’analisi controfattuale incentrata sulla somiglianza tra mondi possibili secondo la teoria dei controfattuali di Lewis, mostrando che un controfattuale del tipo “se non ci fossero qualia, allora alcuni comportamenti non potrebbero darsi” risulta vero. Infine viene proposto un argomento che dovrebbe mostrare, che se effettivamente i qualia sono necessari per alcuni tipi di comportamenti, allora l’esperimento mentale degli zombie non può funzionare. Se la fisica del mondo zombie deve permettere il realizzarsi di azioni che nel mondo attuale avverrebbero solo per la presenza di qualia, allora un mondo-zombie è possibile solo se si includono nella fisica di quel mondo anche i qualia. Questo mostra che seppure i qualia non possono essere descritti da un linguaggio fisicalista possono essere compresi in una metafisica fisicalista. (shrink)

A familiar interpretation of quantum mechanics (one of a number of views sometimes labeled the "Copenhagen interpretation'"), takes its empirical apparatus at face value, holding that the quantum wave function evolves by the Schrödinger equation except on certain occasions of measurement, when it collapses into a new state according to the Born rule. This interpretation is widely rejected, primarily because it faces the measurement problem: "measurement" is too imprecise for use in a fundamental physical theory. We argue that this is (...) a weak objection, as there may be many ways of making "measurement" precise. However, measurement-collapse interpretations face a more serious objection: a dilemma tied to the quantum Zeno effect. Is measurement itself an observable that can enter superpositions? If yes, then the standard measurement-collapse dynamics is ill-defined. If no, then (at least if measurement is an observable), measurements can never start or finish. The best way out is to deny that measurement is an observable, but this leads to strong and revisionary consequences. This reinforces the view that there is no nonrevisionary interpretation of quantum mechanics. (shrink)

Howard Robinson has criticized the contemporary revival of hylomorphism in analytic philosophy for being inconsistent with the causal closure of the physical (CCP) and, by consequence, modern science. This thesis critically evaluates Robinson's criticism. We firstly analyze Robinson’s argument and reinforce it with Jaegwon Kim's causal overdetermination argument. We then turn to CCP itself, settling its exact meaning and highlighting its problems. We argue that CCP’s deferral of the meaning of “physical” to physics renders it false - if applied to (...) present physics – or undetermined – if it refers to future physics. On top of that, a careful look at present physics shows that CCP is not actually given by physics, as its proponents often claim, but rather imposed on it. Having considered the insufficiencies of CCP, we turn to the philosophical framework of hylomorphism, arguing that contemporary structural accounts of hylomorphism are bound fall prey to Robinson’s and Kim’s arguments. As such, one should embrace a more classically-inspired version of transformational hylomorphism according to which the form of substance dynamically re-identifies the material parts of an entity towards the same end as a singular causal system. This account of form provides a cohesive distinction between substances on the one hand and mere heaps or aggregates of matter on the other. This will prove to be particularly advantageous when considering various examples from contemporary biology that defy CCP’s microreductionism in showing the importance and causal relevance of biological higher-level phenomena in shaping its lower-level physical and chemical surrogates. We conclude that CCP’s picture of nature, with its monistic view of causation, is not in line with our best science. Contemporary science, from physics to biology, provides us a picture of nature where there is a constant and dynamic interplay of higher and lower-level phenomena, with both shaping each other in novel and unpredictable ways. Aristotelian hylomorphism, with its pluralistic approach to causation, provides a much stronger metaphysical framework to ground such picture. It grounds both strong emergence and downwards causation in substantial forms and, as such, gives us the tools to understand the processual characters of substances whilst upholding their unity. (shrink)

Property dualism [PD], when adopted by physicalists, is the view that mental properties are irreducible and joined to the physical. Many property dualists who subscribe to physicalism hold epiphenomenalism—the view that the mind does not have a causal role in affecting physical events (e.g., bodily movements).1 In this paper, I examine two possible origins of mental properties and the entailments of those origins if one is committed to physicalism. First, mental properties have a generative origin (e.g., emergence, neurophysiological, etc.). Second, (...) mental properties are fundamental. If mental properties have generative origins, then physicalism has an epistemological problem. Namely, if physical facts determine all mental facts, then we have exceedingly little evidence to favor the widespread existence of epiphenomenal minds over philosophers’ zombies.2 Briefly, the self has mental properties, but the irreducibility of mental properties and their causal inefficacy means that we cannot know the mental status of others. Whereas to claim mental properties as fundamental could entail panpsychism (or proto-panpsychism) and no physicalist method to determine what possesses mental properties. Fundamental mental properties entail the possibility of widespread epiphenomenal minds and the possession of mental properties by unexpected entities so that all biological material and some inanimate objects may have a near equal claim to possessing mental properties. (shrink)

Most physicalists believe that physicalism is a thesis that denies the existence of fundamental mentality either as a substance or as a property. Therefore, since most physicalists also endorse a posteriori physicalism, according to them, if the future physical theory posits fundamental mentality as a fundamental physical concept, then physicalism will be falsified. In contrast, there are those who believe that the core idea of physicalism is an ontological deference to science (especially physics); the idea that is usually called scientism (...) and is closely related to methodological naturalism. According to them, if physicists posit fundamental mentality as an integral part of the future fundamental physical theory, physicalism will not be falsified, and physicalists may (or should) accept fundamental mentality as a genuine physical concept. In this paper, I argue that there is some historical evidence in support of the latter understanding of physicalism. First, I give some historical evidence that seems to suggest that the historical origin of physicalism is the failure of those explanations – or pseudo-explanations – that have appealed to supernatural non-physical entities. Second, I show that in some of the initial reflections on materialism – the predecessor of physicalism – in the first half of the twentieth century, philosophers understood materialism in terms of the very historical origin. (shrink)

Physicalism is the idea that everything either is physical or is nothing over and above the physical. For this formulation of physicalism to have determinate content, it should be identified what the “physical” refers to; i.e. the body problem. Some other closely related theses, especially the ones employed in the causal arguments for different versions of physicalism, and more especially the causal closure thesis, are also subject to the body problem. In this paper, I do two things. First, I explore (...) the structure of causal arguments for physicalism that represents a general argument. To do this, the premises and the conclusion of the general argument are given exact formulations. Second, drawing on those premises, especially the causal closure thesis, I propose a naturalistic formulation of the physical that satisfies the requirements any formulation of the physical is expected to fulfill. Following this proposal, we also have a recursive algorithm to recognize the set of all physical events. (shrink)

ABSTRACT The exclusion problem is meant to show that non-reductive physicalism leads to epiphenomenalism: if mental properties are not identical with physical properties, then they are not causally efficacious. Defenders of a difference-making account of causation suggest that the exclusion problem can be solved because mental properties can be difference-making causes of physical effects. Here, we focus on what we dub an incompatibilist implementation of this general strategy and argue against it from a non-reductive physicalist perspective. Specifically, we argue that (...) incompatibilism undermines either the non-reductionist or the physicalist aspirations of non-reductive physicalism. (shrink)

Is there such a thing as mental causation? Is it possible for the mental to have causal influence on the physical? Or has the old “mind over matter” question been rendered obsolete by the advent of brain science? Whatever our answers to these questions, it seems that we cannot systematically pursue them without considering what makes mental causation problematic in the first place: The causal closure of the physical world. This paper revisits the problem of mental causation by drawing on (...) a classical debate between Dharmakirti and the Indian materialists. The main argument of the paper is that expanding our conception of causality to accommodate phenomenal content can cast new light on the problem of mental causation. A satisfactory solution to the problem of mental causation must reject the completeness of the physical principle in favor of conceptions of causality that allow for phenomenal properties to play a causal-explanatory function. (shrink)

This book is about trying to comprehend the mind from both scientific and philosophical standpoints. In recent years interest has revived in the difficult problem of consciousness. The many difficulties of understanding our minds have been considered in the past, mainly from philosophical or religious viewpoints, but only more recently from scientific perspectives. The book charts the landscape and proposes that the fundamental thing in the world is an arrangement, and this concept can encompass both material objects and things of (...) the mind. This eliminates the old contrast between mind and matter as both should be properly considered as arrangements, producing a philosophical monism that is consistent with modern science. The idea that all mental activity should be viewed as essentially physical is considered not wrong but misconceived and irrelevant, as it is far from the most parsimonious explanation of many mental events. A viewpoint is developed that is sufficiently wide to encompass most human activities but narrowed to exclude certain philosophical puzzles. Suggestions are made about how some of the tough problems in the philosophy of mind, such as causality, intentionality, and the nature of qualia, can be resolved by considering the fundamental structures and limitations of thought, linguistic processes, and our position in the web of life and its evolution. The nature of acts of creation and their importance in the arts are considered, and suggestions are made about the place in our lives for spiritual beliefs. This book is different from others as it aims to provide a complete overview of the territory of the mind in a way that removes older philosophical dilemmas but is compatible with modern science. It offers a new perspective on the old difficulties of understanding the mind and presents new avenues of thought. (shrink)

Physicalism is often characterized as an empirical hypothesis. But according to an alternative conceptualization, it is instead a stance or an attitude. I analyze Roy Wood Sellars’s materialist philosophy in order to show that it is a counterexample to a specific physicalist empirical hypothesis: the minimal completeness of the physical. However, it is arguably not reducible to a stance: it is a meaningful metaphysical thesis with substantive cognitive content.

There is a standard way of interpreting physicalism. This is as a completeness thesis of some kind. Completeness physicalists believe there is or in principle could be some future physics that provides a complete explanatory or ontological basis for our universe. And this provides a sense in which physics is special among the sciences, the sense in which it is fundamental. This paper contrasts this standard completeness physicalism with what is a more plausible maximality physicalism. Maximality physicalists believe physics is (...) special only in its providing an epistemic framework that is ontologically or explanatorily superior in some respect. This paper shows how completeness physicalists cannot, while maximality physicalists can, provide an adequate explanation of the empirical support for and the pragmatic usefulness of physicalism. It also shows how maximality physicalism is better supported in light of several developments from late twentieth century philosophy of science. (shrink)

The causal closure of the physical world is assumed everywhere in physics but has little empirical support within living organisms. For the spiritual to have effects in nature, and make a difference there, the laws of physical nature would have to be modified or extended. I propose that the renormalized parameters of quantum field theory (masses and charges) are available to be varied locally in order to achieve ends in nature. This is not adding extra forces to nature but rescaling (...) the forces which already exist. We separate metric time in 4 dimensions from process time as the order of actualization of potentialities. This is to allow iterative forward and reverse steps in metric time to influence intermediate variations in the vacuum permittivities to move charged bodies towards achieve specific targets at a later time. Then mental or spiritual influx could have effects in nature, and these should be measurable in biophysics experiments. With this proposal, we see after some centuries how ‘final causes’ could once again be seen active in nature. (shrink)

Dans cet article, je propose de défendre le monisme russellien, une théorie posant l’existence de quiddités phénoménologiques au fondement de la réalité. Je propose en particulier de montrer que le monisme russellien échappe aux objections qui en font une version inadéquate du physicalisme. Pour ce faire, j’identifie les trois raisons qui motivent le physicalisme, c’est-à-dire la parcimonie, le naturalisme et l’argument de la clôture causale, et j’argumente qu’il faut considérer que le monisme russellien satisfait ces trois motivations. Ainsi, si j’ai (...) raison, le monisme russellien devrait être considéré comme imperméable aux critiques qui voient en lui une forme problématique de physicalisme. (shrink)

Some non-reductionists claim that so-called ‘exclusion arguments’ against their position rely on a notion of causal sufficiency that is particularly problematic. I argue that such concerns about the role of causal sufficiency in exclusion arguments are relatively superficial since exclusionists can address them by reformulating exclusion arguments in terms of physical sufficiency. The resulting exclusion arguments still face familiar problems, but these are not related to the choice between causal sufficiency and physical sufficiency. The upshot is that objections to the (...) notion of causal sufficiency can be answered in a straightforward fashion and that such objections therefore do not pose a serious threat to exclusion arguments. (shrink)

Many philosophers argue that exclusion arguments cannot exclude non-reductionist physicalist mental properties from being causes without excluding properties that are patently causal as well. List and Stoljar (2017) recently argued that a similar response to exclusion arguments is also available to dualists, thereby challenging the predominant view that exclusion arguments undermine dualist theories of mind. In particular, List and Stoljar maintain that exclusion arguments against dualism require a premise that states that, if a property is metaphysically distinct from the sufficient (...) cause of an effect, this property cannot be a cause of that effect. I argue that this premise is indeed likely to exclude patently causal properties, but that exclusion arguments against dualism do not require this premise. The relation that enables metaphysically distinct properties to cause the same effect in the relevant way turns out to be tighter than the relation typically posited between dualist conscious properties and their underlying physical properties. It is therefore still plausible that the latter causally exclude the former and that compelling exclusion arguments against dualism can be formulated by using a weaker exclusion premise. I conclude by proposing such a formulation. (shrink)

The causal efficacy of a material system is usually thought to be produced by the law-like actions and interactions of its constituents. Here, a specific system is constructed and explained that produces a cause that cannot be understood in this way, but instead has novel and autonomous efficacy. The construction establishes a proof-of-feasibility of strong emergence. The system works by utilizing randomness in a targeted and cyclical way, and by relying on sustained evolution by natural selection. It is not vulnerable (...) to standard arguments against strong emergence, in particular ones that assume that the physical realm is causally closed. Moreover, it does not suffer from epiphenomenalism or causal overdetermination. The system uses only standard material components and processes, and is fully consistent with naturalism. It is discussed whether the emergent cause can still be viewed as ‘material’ in the way that term is commonly understood. (shrink)

The problem of consciousness, as I present it here, is the problem of reconciling our understanding of consciousness with (i) the evidence for phenomenal transparency and (ii) the evidence that the physical world is causally closed. We might hope that idealism will do this. For idealism is just as hospitable to phenomenal transparency as dualism. And there is a sense in which idealism posits no physical world to be causally closed in the first place. But I argue that idealism has (...) no advantage over dualism and physicalism in the face of this problem. In approaching this issue I also make some taxonomical suggestions that help clarify the options left open by the causal closure argument against dualism. I would urge these on theorists dealing with that argument generally, not just those interested in idealism. (shrink)

This paper explores and defends the idea that mental properties and their physical bases jointly cause their physical effects. The paper evaluates the view as an emergentist response to the exclusion problem, comparing it with a competing nonreductive physicalist solution, the compatibilist solution, and argues that the joint causation view is more defensible than commonly supposed. Specifically, the paper distinguishes two theses of closure, Strong Closure and Weak Closure, two causal exclusion problems, the overdetermination problem and the supervenience problem, and (...) argues that emergentists can avoid the overdetermination problem by denying Strong Closure and respond to the supervenience problem by accepting the joint causation view. (shrink)

In “The Meta-Problem of Consciousness”, David Chalmers draws a new framework in which to consider the mind-body problem. In addition to trying to solve the hard problem of consciousness – the problem of why and how brain processes give rise to conscious experience –, he thinks that philosophy, psychology, neuro-science and the other cognitive sciences should also pursue a solution to what he calls the “meta-problem” of consciousness – i.e., the problem of why we think there is a problem with (...) consciousness. My claim is that, while Chalmers’s project is generously ecumenical as well as beautiful in its meticulous detail, it is mistaken in its core assumption that the meta-problem can be formulated as an “easy problem” for science to solve. Furthermore, the project tilts the field toward illusionism against Type-B materialism, as far as physicalist solutions to the hard problem and the meta-problem are concerned. I will argue that Type-B materialism emerges unscathed from this dialectic. (shrink)

Russellian monism—an influential doctrine proposed by Russell (The analysis of matter, Routledge, London, 1927/1992)—is roughly the view that physics can only ever tell us about the causal, dispositional, and structural properties of physical entities and not their categorical (or intrinsic) properties, whereas our qualia are constituted by those categorical properties. In this paper, I will discuss the relation between Russellian monism and a seminal paradox facing epiphenomenalism, the paradox of phenomenal judgment: if epiphenomenalism is true—qualia are causally inefficacious—then any judgment (...) concerning qualia, including epiphenomenalism itself, cannot be caused by qualia. For many writers, including Hawthorne (Philos Perspect 15:361–378, 2001), Smart (J Conscious Stud 11(2):41–50, 2004), and Braddon-Mitchell and Jackson (The philosophy of mind and cognition, Blackwell, Malden, 2007), Russellian monism faces the same paradox as epiphenomenalism does. I will assess Chalmers’s (The conscious mind: in search of a fundamental theory. Oxford University Press, New York, 1996) and Seager’s (in: Beckermann A, McLaughlin BP (eds) The Oxford handbook of philosophy of mind. Oxford University Press, New York, 2009) defences of Russellian monism against the paradox, and will put forward a novel argument against those defences. (shrink)

A primary goal of this chapter is to highlight neglected epistemic parallels between dualism and physicalism. Both dualist and physicalist arguments employ a combination of empirical data and armchair reflection; both rely on considerations stemming from how we conceptualize certain phenomena; and both aim to establish views that are compatible with scientific results but go well beyond the deliverances of empirical science. -/- I begin the chapter by fleshing out the distinctive commitments of dualism, in a way that illuminates the (...) interplay of epistemic and metaphysical elements within the dualist position. Section 2 outlines two influential arguments for dualism and explains how dualists defend those arguments from key criticisms. Sections 3 and 4 examine the most powerful objections to dualism: that it is inferior to physicalism as regards the theoretical virtue of simplicity, and that it cannot explain mental causation. I show that each of these objections to dualism depends on substantial assumptions that cannot be empirically justified. The objection from mental causation additionally rests on an ambitious assumption about how we conceptualize physical phenomena. Section 5 briefly reviews how epistemic considerations inform arguments on both sides of this debate. (shrink)

Mental causation is vitally important to the integrated information theory (IIT), which says consciousness exists since it is causally efficacious. While it might not be directly apparent, metaphysical commitments have consequential entailments concerning the causal efficacy of consciousness. Commitments regarding the ontology of consciousness and the nature of causation determine which problem(s) a view of consciousness faces with respect to mental causation. Analysis of mental causation in contemporary philosophy of mind has brought several problems to the fore: the alleged lack (...) of psychophysical laws, the causal exclusion problem, and the causal pairing problem. This article surveys the threat each problem poses to IIT based on the different metaphysical commitments IIT theorists might make. Distinctions are made between what I call reductive IIT, non-reductive IIT, and non-physicalist IIT, each of which make differing metaphysical commitments regarding the ontology of consciousness and nature of causation. Subsequently, each problem pertaining to mental causation is presented and its threat, or lack thereof, to each version of IIT is considered. While the lack of psychophysical laws appears unthreatening for all versions, reductive IIT and non-reductive IIT are seriously threatened by the exclusion problem, and it is difficult to see how they could overcome it while maintaining a commitment to the causal closure principle. Yet, non-physicalist IIT denies the principle but is therefore threatened by the pairing problem, to which I have elsewhere provided a response that is briefly outlined here. This problem also threatens non-reductive IIT, but unlike non-physicalist IIT it lacks an evident response. The ultimate aim of this survey is to provide a roadmap for IIT theorists through the maze of mental causation, by clarifying which commitments lead to which problems, and how they might or might not be overcome. Such a survey can aid IIT theorists as they further develop and hone the metaphysical commitments of IIT. (shrink)

Interactionists hold that minds are non-physical objects that interact with brains. The neural discernment problem for interactionism is that of explaining how non-physical minds produce behavior and cognition by exercising different causal powers over physiologically similar neurons. This paper sharpens the neural discernment problem and proposes two interactionist models of mind-brain interaction that solve it. One model avoids overdetermination while the other respects the causal closure of the physical domain.

The chief motivation for epiphenomenalist dualism is its promise to solve dualism’s causal exclusion problem without inducing causal overdetermination or violations of the causal closure of the physical. This paper argues that epiphenomenalist dualism is itself susceptible to an exclusion problem. The problem exploits symmetries of determination and influence generated by a wide class of physical theories. Further, I argue that there is an interference effect between solving epiphenomenalist dualism's exclusion problem and using epiphenomenalist dualism as a solution to the (...) causal exclusion problem. What emerges is an overlooked, empirically-motivated challenge to epiphenomenalist dualism. (shrink)

Jaegwon Kim has developed an argument that interactionist dualists cannot account for the causal relations between minds and brains. This paper develops a closely related argument that focuses instead on the causal relations between minds and neurons. While there are several promising responses to Kim’s argument, their plausibility relies on a relatively simple understanding of mind–brain relations. Once we shift our focus to neurons, these responses lose their appeal. The problem is that even if mind–brain causal pairing can be explained (...) at no great theoretical cost, the complex interactions non-physical minds would need to have with neurons cannot. (shrink)

The purpose of this paper is to address a well-known dilemma for physicalism. If mental properties are type identical to physical properties, then their causal efficacy is secure, but at the cost of ruling out mentality in creatures very different to ourselves. On the other hand, if mental properties are multiply realizable, then all kinds of creatures can instantiate them, but then they seem to be causally redundant. The causal exclusion problem depends on the widely held principle that realized properties (...) inherit their causal powers from their realizers. While this principle holds for functional realization, it fails on a broader notion of realization that permits the realization of complex qualitative properties such as spatial and temporal patterns. Such properties are best seen as dependent powerful qualities, which have their causal roles in virtue of being the qualities they are, and do not inherit powers from their realizers. Recent studies have identified one such property—neural synchrony—as a correlate of consciousness. If synchrony is also partially constitutive of consciousness, then phenomenal properties are both multiply realizable and causally novel. I outline a version of representationalism about consciousness on which this constitution claim holds. (shrink)

The Exclusion Argument has been regarded as the most powerful challenge to non-reductive physicalism. This argument presupposes a crucial thesis, Causal Closure of the Physical, which asserts that every physical effect has a sufficient physical cause. Although this thesis is widely accepted in contemporary philosophy of mind, philosophers say surprisingly little about what notion of physical entities should be adopted in the context. In this article, the author distinguishes between three versions of Closure that appeal to a narrow, a moderate, (...) and a wide notion of the physical, respectively. The author then argues that none of the three versions can challenge non-reductive physicalism. (shrink)

In this paper I discuss three problems of consciousness. The first two have been dubbed the “Hard Problem” and the “Harder Problem”. The third problem has received less attention and I will call it the “Hardest Problem”. The Hard Problem is a metaphysical and explanatory problem concerning the nature of conscious states. The Harder Problem is epistemological, and it concerns whether we can know, given physicalism, whether some creature physically different from us is conscious. The Hardest Problem is a problem (...) about reference. Recently some philosophers – among them David Papineau – who advocate a physicalist approach to both the Hard and the Harder problem have called into question the common sense assumption that phenomenal concepts – subjective concepts that we apply directly to experience – refer determinately (modulo vagueness) to real properties that can be instantiated in minds other than my own. The Hardest Problem is the problem of explaining how, given physicalism, this assumption could be true. In this paper I explore how these three problems appear from the perspective of a physicalist approach to consciousness based on Brian Loar’s account of phenomenal concepts, recently dubbed the “phenomenal concept strategy”. My contention is that this approach can go quite far in handling not just the first two problems but the Hardest Problem as well. (shrink)

In this paper, I explore anomalous dualism about consciousness, a view that has not previously been explored in any detail. We can classify theories of consciousness along two dimensions: first, a theory might be physicalist or dualist; second, a theory might endorse any of the three following views regarding causal relations between phenomenal properties (properties that characterize states of our consciousness) and physical properties: nomism (the two kinds of property interact through deterministic laws), acausalism (they do not causally interact), and (...) anomalism (they interact but not through deterministic laws). I suggest that a kind of anomalous dualism, nonreductive anomalous panpsychism, promises to offer the best overall answer to two pressing issues for dualist views, the problem of mental causation and the mapping problem (the problem of predicting mind-body associations). (shrink)

The principle of energy conservation is widely taken to be a se- rious difficulty for interactionist dualism (whether property or sub- stance). Interactionists often have therefore tried to make it satisfy energy conservation. This paper examines several such attempts, especially including E. J. Lowe’s varying constants proposal, show- ing how they all miss their goal due to lack of engagement with the physico-mathematical roots of energy conservation physics: the first Noether theorem (that symmetries imply conservation laws), its converse (that conservation (...) laws imply symmetries), and the locality of continuum/field physics. Thus the “conditionality re- sponse”, which sees conservation as (bi)conditional upon symme- tries and simply accepts energy non-conservation as an aspect of interactionist dualism, is seen to be, perhaps surprisingly, the one most in accord with contemporary physics (apart from quantum mechanics) by not conflicting with mathematical theorems basic to physics. A decent objection to interactionism should be a posteri- ori, based on empirically studying the brain. (shrink)

The argument from causal closure of the physical is usually considered the most powerful argument in favor of the ontological doctrine of physicalism. Many authors, most notably Papineau, assume that CCP implies that physicalism is supported by physics. I demonstrate, however, that physical science has no bias in the ontological debate between proponents of physicalism and dualism. I show that the arguments offered for CCP are effective only against the accounts of mental causation based on the action of the mental (...) forces of a Newtonian nature, i.e. those which manifest themselves by causing accelerations. However, it is conceivable and possible that mental causation is manifested through the redistribution of energy, momentum and other conserved quantities in the system, brought about by altering the state probability distribution within the living system and leading to anomalous correlations of neural processes. After arguing that a probabilistic, interactionist model of mental causation is conceivable, which renders the argument from causal closure of the physical ineffective, I point to some basic features that such a model must have in order to be intelligible. At the same time, I indicate the way that conclusive testing of CCP can be done within the theoretical framework of physics. (shrink)

The argument from causal closure of the physical is usually considered the most powerful argument in favor of the ontological doctrine of physicalism. Many authors, most notably Papineau, assume that CCP implies that physicalism is supported by physics. I demonstrate, however, that physical science has no bias in the ontological debate between proponents of physicalism and dualism. I show that the arguments offered for CCP are effective only against the accounts of mental causation based on the action of the mental (...) forces of a Newtonian nature, i.e. those which manifest themselves by causing accelerations. However, it is conceivable and possible that mental causation is manifested through the redistribution of energy, momentum and other conserved quantities in the system, brought about by altering the state probability distribution within the living system and leading to anomalous correlations of neural processes. After arguing that a probabilistic, interactionist model of mental causation is conceivable, which renders the argument from causal closure of the physical ineffective, I point to some basic features that such a model must have in order to be intelligible. At the same time, I indicate the way that conclusive testing of CCP can be done within the theoretical framework of physics. (shrink)

I outline two ways of reading what is at issue in the exclusion problem faced by non-reductive physicalism, the “vertical” versus “horizontal”, and argue that the vertical reading is to be preferred to the horizontal. I discuss the implications: that those who have pursued solutions to the horizontal reading of the problem have taken a wrong turn.

The modal properties of the principle of the causal closure of the physical have traditionally been said to prevent anything outside the physical world from affecting the physical universe and vice versa. This idea has been shown to be relative to the definition of the principle. A traditional definition prevents the one universe from affecting any other universe, but with a modified definition, e.g., the causal closure of the physical can be consistent with the possibility of one universe affecting the (...) other universe. Gamper proved this modal property by implementing interfaces between universes. Interfaces are thus possible, but are they realistic? To answer this question, I propose a two-step process where the second step is scientific research. The first step, however, is to fill the gap between the principles or basic assumptions and science with a consistent theoretical framework that accommodates the modal properties of an ontology that matches the basic assumptions. (shrink)

A number of philosophers have argued that causation is not an objective feature of the microphysical world but rather is a perspectival phenomenon that holds only between “coarse-grained” entities such as those that figure in the special sciences. This view seems to pose a problem for arguments for physicalism that rely on the alleged causal completeness of physics. In this paper, I address this problem by arguing that the completeness of physics has two components, only one of which is causal. (...) These two components of completeness can be used in an argument for physicalism that is supported by strong inductive evidence even in the absence of microphysical causation. (shrink)

In this essay, I defend a mind-body dualism, according to which human minds are immaterial substances that exercise non-redundant causal powers over bodies, against the notorious problem of psychophysical causation. I explicate and reply to three formulations of the problem: (i) the claim that, on dualism, psychophysical causation is inconsistent with physical causal closure, (ii) the claim that psychophysical causation on the dualist view is intolerably mysterious, and (iii) Jaegwon Kim’s claim that dualism fails to account for causal pairings. Ultimately, (...) I conclude that these objections fail and that dualist interactionism is no more problematic or mysterious than physical causation. (shrink)

Nonreductive physicalists endorse the principle of mental causation, according to which some events have mental causes: Sid climbs the hill because he wants to. Nonreductive physicalists also endorse the principle of physical causal completeness, according to which physical events have sufficient physical causes: Sid climbs the hill because a complex neural process in his brain triggered his climbing. Critics typically level the causal exclusion problem against this nonreductive physicalist model, according to which the physical cause is a sufficient cause of (...) the behavioural effect, so the mental cause is excluded from causally influencing Sid’s behaviour. In this paper I demonstrate how numerous nonreductive physicalists have responded to the causal exclusion problem by weakening the principle of physical causal completeness in numerous ways. The result: either numerous nonreductive physicalist solutions fail on account of the fact that they do not satisfy a robustly defined principle of physical causal completeness, or there is an accelerating trend of solving the causal exclusion problem by suitably weakening the principle of physical causal completeness. (shrink)

Phenomenal knowledge is knowledge of what it is like to be in conscious states, such as seeing red or being in pain. According to the knowledge argument (Jackson 1982, 1986), phenomenal knowledge is knowledge that, i.e., knowledge of phenomenal facts. According to the ability hypothesis (Nemirow 1979; Lewis 1983), phenomenal knowledge is mere practical knowledge how, i.e., the mere possession of abilities. However, some phenomenal knowledge also seems to be knowledge why, i.e., knowledge of explanatory facts. For example, someone who (...) has just experienced pain for the first time learns not only that this is what pain is like, but also why people tend to avoid it. Some philosophers have claimed that experiencing pain gives knowledge why in a normative sense: it tells us why pain is bad and why inflicting it is wrong (Kahane 2010). But phenomenal knowledge seems to explain not (only) why people should avoid pain, but why they in fact tend to do so. In this paper, I will explicate and defend a precise version of this claim and use it as a basis for a new version of the knowledge argument, which I call the explanatory knowledge argument. According to the argument, some phenomenal knowledge (1) explains regularities in a distinctive, ultimate or regress-ending way, and (2) predict them without induction. No physical knowledge explains and predicts regularities in the same way. This implies the existence of distinctive, phenomenal explanatory facts, which cannot be identified with physical facts. I will show that this argument can be defended against the main objections to the original knowledge argument, the ability hypothesis and the phenomenal concept strategy, even if it turns out that the original cannot. In this way, the explanatory knowledge argument further strengthens the case against physicalism. (shrink)

The received view in physicalist philosophy of mind assumes that causation can only take place at the physical domain and that the physical domain is causally closed. It is often thought that this leaves no room for mental states qua mental to have a causal influence upon the physical domain, leading to epiphenomenalism and the problem of mental causation. However, in recent philosophy of causation there has been growing interest in a line of thought that can be called causal antifundamentalism: (...) causal notions cannot play a role in physics, because the fundamental laws of physics are radically different from causal laws. Causal anti-fundamentalism seems to challenge the received view in physicalist philosophy of mind and thus raises the possibility of there being genuine mental causation after all. This paper argues that while causal anti-fundamentalism provides a possible route to mental causation, we have reasons to think that it is incorrect. Does this mean that we have to accept the received view and give up the hope of genuine mental causation? I will suggest that the ontological interpretation of quantum theory provides us both with a view about the nature of causality in fundamental physics, as well as a view how genuine mental causation can be compatible with our fundamental (quantum) physical ontology. (shrink)

In this dissertation, I develop and defend a model of causation that allows for dualist mental causation in worlds where the physical domain is physically complete. In Part I, I present the dualist ontology that will be assumed throughout the thesis and identify two challenges for models of mental causation within such an ontology: the exclusion worry and the common cause worry. I also argue that a proper response to these challenges requires a thoroughly lightweight account of causation, i.e. an (...) account that allows for causes to be metaphysically distinct from the phenomena that produce or physically necessitate their effects. In Part II, I critically evaluate contemporary responses to these challenges from the philosophical literature. In particular, I discuss List and Stoljar’s criticism of exclusion worries, Kroedel’s alternative dualist ontology, concerns about the notion of causal sufficiency, and Lowe’s models of dualist mental causation. I argue that none of these proposals provide independent motivation for a thoroughly lightweight account of causation and therefore leave room for improvement. In the first four chapters of Part III, I develop a thoroughly lightweight model of causation, which builds on interventionist approaches to causation. First, I explain how so-called ‘holding fixed’-requirements in standard interventionist accounts stand in the way of dualist mental causation. I then argue that interventionist accounts should impose a robustness condition on causal correlations and that, with this condition in place, the ‘holding fixed’-requirements can be weakened such that they do allow for dualist mental causation. I dub the interventionist model with such weakened ‘holding fixed’-requirements ‘insensitive interventionism’, argue that it can counter the exclusion worry as well as the common cause worry, and explain under which circumstances it would predict there to be dualist mental causation. Importantly, these circumstances might, for all we know, hold in the actual world. In the final three chapters of Part III, I defend insensitive interventionism against some objections. I consider the objection that causation must be productive, the objection that causes must physically necessitate their effects, and the objection that insensitive interventionism is too permissive. I respond by drawing from the literature on causation by absences and on the relation between causation and fundamental physics. Overall, insensitive interventionism performs as well as standard interventionist accounts. I conclude that insensitive interventionism is a credible model of causation. (shrink)

The argument from causal closure for physicalism requires the principle that a physical event can only occur through being necessitated by antecedent physical events. This article proposes a view of the causal structure of the world that claims not only that an event need not be necessitated by antecedent events, but that an event cannot be necessitated by antecedent events. All events are open to counteraction. In order to spell out various kinds of counteraction I introduce the idea of ‘directedness.’.

The Exclusion Argument has afflicted non-reductionists for decades. In this article, I attempt to show that emergentism—the view that mental entities can downwardly cause physical entities in a non-overdetermining way—is the most plausible approach to solving the exclusion problem. The emergentist approach is largely absent in contemporary philosophy of mind, because emergentism rejects the Causal Closure of Physics, a doctrine embraced by almost all physicalists. This article, however, challenges the consensus on causal closure and defends a physicalist version of emergentism. (...) On closer examination, I find that neither physical evidence nor physicalist considerations can satisfactorily support causal closure. Moreover, I argue that two competing approaches that accept causal closure, compatibilism and autonomism, involve ad hoc postulations of mental causation. Therefore, all things considered, emergentism is the best option available to non-reductive physicalists. (shrink)

This article aims to provide a brief overview of mental causation problem and its current proposed solutions. Indeed, mental causation turns out as one of the most difficult philosophical conundrums in contemporary philosophy of mind. In the first two sections, we offer an outline of the problem and the philosophical debate about it, and show that mental causation problem is pivotal within the contemporary philosophy of mind. In the third section, we focus on the most popular models of mental causation, (...) namely Kim's and Davidson's accounts, also discussing the objections raised against them. In the final section, we take into consideration some recent proposals poised to solve the mental causation problem, including powerism. Given the logical and metaphysical plausibility of almost all these different options, our conclusion is that mental causation is still an open problem and it is far from being resolved. (shrink)

Introduction to a special issue on the Philosophy and Science of Mind.