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Barbara Montero A Russellian Response to the Structural Argument Against Physicalism Abstract: According to David Chalmers (2002), ‘we have good rea- son to suppose that consciousness has a fundamental place in nature’ (p. 135). This, he thinks is because the world as revealed to us by fun- damental physics is entirely structural — it is a world not of things, but of relations — yet relations can only account for more relations, and consciousness is not merely a relation (pp. 120–21). Call this the ‘structural argument against physicalism.’ I shall argue that there is a view about the relationship between mind and body, what I call, ‘Russellian physicalism’ that is consistent with the premises of the structural argument yet does not imply that consciousness is fundamental. According to David Chalmers (2002), ‘we have good reason to sup- pose that consciousness has a fundamental place in nature’ (p. 135). The world as revealed to us by fundamental physics, Chalmers tells us, is entirely structural — it is a world not of things, but of relations yet relations can only account for more relations, and conscious- ness is not merely

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Page 1: Web viewDaniel Stoljar (2006) argues against this. ... Dennett, D. (1995), ‘The unimagined preposterousness of zombies’, Journal. of. Consciousness. Studies

Barbara Montero

A Russellian Response to the Structural Argument Against

Physicalism

Abstract: According to David Chalmers (2002), ‘we have good rea- son to suppose that consciousness has a fundamental place in nature’ (p. 135). This, he thinks is because the world as revealed to us by fun- damental physics is entirely structural — it is a world not of things, but of relations — yet relations can only account for more relations, and consciousness is not merely a relation (pp. 120–21). Call this the ‘structural argument against physicalism.’ I shall argue that there is a view about the relationship between mind and body, what I call, ‘Russellian physicalism’ that is consistent with the premises of the structural argument yet does not imply that consciousness is fundamental.

According to David Chalmers (2002), ‘we have good reason to sup- pose that consciousness has a fundamental place in nature’ (p. 135). The world as revealed to us by fundamental physics, Chalmers tells us, is entirely structural — it is a world not of things, but of relations— yet relations can only account for more relations, and conscious- ness is not merely a relation (pp. 120–21). Call this the ‘structural argument against physicalism,’ and its conclusion is that conscious- ness must be a fundamental feature of the world.

But in what sense is consciousness a fundamental feature of the world? Chalmers see three options. The first is interactive dualism, which is the view that fundamental conscious experiences, such as the

Correspondence:Barbara Montero, Philosophy Program, The Graduate Center, CUNY, 365 Fifth Ave., New York, NY 10016, USA.Email: [email protected]

Journal of Consciousness Studies, 17, No. 3–4, 2010, pp. 70–83

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feeling of pain, causally interact with physical processes. The second is epiphenomenalism, which holds that fundamental conscious expe- riences accompany, but do not causally affect physical processes (though they may be caused by them). And the third — a view which he claims to find ‘most appealing’ — is what he calls type-F, or Russellian monism, which is the view, as he puts it, that ‘conscious- ness is constituted by the intrinsic properties of fundamental physical entities’ (Chalmers, 2002, p. 265).

As Chalmers sees it, each of these views results in a fundamental place for consciousness. It is clear that interactive dualism implies that consciousness is over and above the physical features of the world. In its Cartesian form, consciousness is a substance that is utterly distinct from and irreducible to physical substance. In its emergentist form, it holds that experiential properties are neither fundamentally physical nor reducible to any physical properties. It is also clear that epiphenomenalism bestows on consciousness a fundamental place in nature, for even though the epiphenomenal mind may be caused by physical processes, it is also distinct from any of these physical pro- cesses. But does Russellian monism imply that consciousness is fun- damental? The answer to this question is not nearly so clear as it was in the other two cases, for, as I shall argue, various interpretations of the Russellian view imply different conceptions of the grounds of consciousness. In particular, I aim to show that there is a variation of Russellian Monism, what I call ‘Russellian Physicalism’ that, although consistent with the premises of the structural argument against physicalism, does not grant consciousness a fundamental place in nature.

I shall begin with a description of Russellian monism and the idea of physics that it presupposes. I then go on to explain the structural argument against physicalism and why Russellian monism is consis- tent with its premises. After this, I argue that although Russellian monism may be a borderline case of physicalism, a small revision turns it into Russellian physicalism, which is physicalistic through and through. In preview, I argue, that the spirit of antimaterialism is by and large captured by the idea, to put it metaphorically, that mentality received special consideration in the creation of the universe, yet since Russellian physicalism takes the fundamental grounds of every- thing to be neither mental nor specifically for the purpose of generat- ing mentality it does not bestow a place of prominence to the mental. I conclude with a discussion of the Russellian response to ‘the hard problem’, which is the problem of explaining how consciousness arises in a physical world.

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I. Russellian monism

As Chalmers tells us, Russellian monism takes its inspiration from Bertrand Russell’s view that fundamental physics tells us only about the structure of the world, about the abstract relations between things but not about the things themselves. In Chalmers’ words, ‘current physics characterizes its underlying properties (such as mass and charge) in terms of abstract structures and relations, but it leaves open their intrinsic natures’ (2002, p. 259). From physics we learn how mass behaves — we learn that a body with greater mass has more iner- tia, that the mass of a body does not vary with changes in gravity and so forth — but not what mass is apart from a set of behaviors. From physics we learn that opposite charges attract each other, that like charges repel, that the net charge of any isolated system never varies, but we do not learn what charge is, itself, apart from what it does. Form physics we come to understand the nomological or causal role of properties, but not the nature of properties themselves. Russell (1959/1995) puts the view thus: ‘All that physics gives us is certain equations giving abstract properties of their changes. But as to what it is that changes, and what it changes from and to — as to this, physics is silent’ (p. 13). After all, as Galileo famously said, the book of nature is written in the language of mathematics.

According to the Russellian monist, however, nature itself consists of more than abstract relations; for in addition to the relations, there are the things that stand in relation to each other. Besides laws, says the Russellian monist, there is something for the laws to describe. It is difficult to say much about these first order properties, the properties of nature itself, since it is not just in physics, but in all arenas, that we explain things in terms of their relations to other things. To explain something is to tell us what it does, how it affects us, and how it is related to other things. If you ask me what, say, a cantelever bridge is, I shall tell you that it is a bridge that juts out on each side from a sup- port on that side. As opposed to a suspension bridge, or a beam bridge, it would not fall down if you were to cut it in half in the middle, and so on. And it is rigid enough to support railways. But although the prop- erties that concern the Russellian do something — according to the Russellian they form the determination base for consciousness — there is more to them than what they do. They not only do something, they also are something.

But what are they? Chalmers and others refer to them as the intrin- sic properties of fundamental physical entities, but I am not sure if this elucidates them. What is an intrinsic property? Many understand the

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notion along Lewisian lines whereby ‘an intrinsic property of a’ is a property a would have whether or not anything else besides a existed (Langton and Lewis, 1998). But if this is correct, then it seems that physics can tell us about intrinsic properties. For example, a lone posi- tively charged particle has the property of being such that if it were in a world with physical laws x, y, and z, (where x, y, and z describe the laws of our world) and with entities and properties u, v, w (where u, v and w describe the other entities and properties of our), it would be attracted to a negatively charged particle. This property counts as intrinsic on the Lewisian definition yet, arguably, is revealed by physics.

Chalmers tells us, however, that by ‘intrinsic properties’ he means ‘the categorical bases of fundamental physical dispositions’. Roughly, when we learn of an object’s dispositional properties we learn about what an object will do in various circumstances. For example, when we find out that a sugar cube is soluble, we learn that it has the property of being such that if it were placed in water (of a cer- tain temperature for a certain amount of time) it would dissolve. And in due deference to Quine, who thought that dispositional terms are not part of a mature science, it may be, as Simon Blackburn puts it, that ‘science finds only dispositions all the way down’ (1990, p. 63).

But what of the categorical properties, the properties that the Russellian monist thinks form the dependence base for experience? Categorical properties ground dispositional properties, yet conscious- ness, itself, according to the Russellian is not a dispositional property. Presumably, the idea is supposed to be that the categorical properties of the fundamental dispositional properties of physics ground con- sciousness, which, then, grounds certain dispositions. But I am also hesitant to rely on the categorical/dispositional distinction to clarify the Russellian position since, as far as I can tell, categorical proper- ties, though thought of as nondispositional, just seem to be dispositional properties at a lower level. For example, the categorical grounds of a sugar cube’s solubility are said to be its molecular struc- ture but its molecular structure is dispositional, as it is, for example, disposed to ground the sugar cube’s disposition to dissolve. 1 And this disposition is revealed by science.

Of course, Russellian monists are concerned with what they see as the fundamental categorical grounds of the dispositions of fundamen- tal particles and forces. Why is it, for example, that a top quark has the mass that it does? Physics does not say anything about this. However,

[1] Blackburn (1990) lays this view out elegantly.

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even here, if ‘categorical’ is supposed to imply not dispositional, it is unclear whether an answer to this question would refer to categorical properties since, if there is an answer to this question, the answer, it would seem, will cite a dispositional property, for whatever it is that accounts for the top quark’s mass is disposed to give it this mass.

As I see it, what is significant for the Russellian monist is that there is some aspect of the fundamental world, some aspect of the funda- mental properties given to us by physics that grounds consciousness, yet about which physics is silent (perhaps not permanently, but for the foreseeable future). So to highlight this, let me call the properties of the fundamental world, which, according to the Russellian, are not revealed by physics yet ground consciousness (perhaps as well as other things), ‘inscrutables’. Chalmers seems to accept that the Russellian picture of physics and the idea that consciousness may be determined (in part) by inscrutables. But, as I shall go on to argue, once he does this, he has admitted that physicalism, both letter and spirit, might be true.

II. Russellian Monism and the Structural Argument

The structural argument, as I understand it, is this:

(1) The world as revealed to us by fundamental physics is entirely structural.

(2) Structure begets only more structure.(3) Consciousness cannot arise in a purely structural world.

Therefore

Consciousness is a fundamental feature of the world.

Chalmers, I should point out, presents the idea slightly differently. First of all, his, his emphasis is on what physical accounts explain, and, indeed, calls the argument ‘the explanatory argument’. As he puts it,

(1) Physical accounts explain at most structure.(2) Explaining structure does not suffice to explain

consciousness

Therefore

(3) No physical account can explain consciousness.2

[2] I’ve simplified things here just a bit since Chalmers actually mentions ‘structure and func- tion’. Where I have ‘structure’ in this argument, Chalmers has ‘structure and function’.

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Although I have chosen to focus on ontology, on what can exist in a purely structural world, I think that this difference is not one that makes a difference since Chalmers takes his epistemological premises to have ontological implications. A more significant difference, how- ever, is that the explanatory argument is couched in terms of physical accounts of the world, whereas the structural argument is couched in terms of what physics reveals about the world. I imagine that Chalmers would take this, too, to be a difference that does not make a difference since he understands the fundamental physical properties as the fundamental properties of physics. However, I shall later argue that this equation is a mistake. Thus, I present the argument in terms that do not assume this.

Russellian monism is consistent with the premises of the structural argument against physicalism. It views the world of physics as entirely structural and accepts that consciousness would not exist in a purely structural world. The question, now, is whether it implies that consciousness is fundamental.

III From Monism to Physicalism

Russellian monism, according to Chalmers, comes in two forms: panpsychic and protophenomenal (or what might be called ‘panprotopsychic’). The panpsychic version arises if inscrutables are themselves phenomenal. On this way of seeing the Russellian view, the inscrutable nature of the fundamental entities of physics are imbued with mentality. In this case, we have a position that implies that mentality is fundamental and is thus antiphysicalistic.3

But the Russellian view need not be a version of panpsychism.4

Rather, it can posit that inscrutables are ‘protophenomenal.’ As such, they are not themselves phenomenal, but are the grounds of

[3] To be sure, there are those who think that panpsychism is a type of physicalism. For exam- ple, on what Daniel Stoljar (2001) refers to as ‘the object-based conception’ of the physi- cal, the physical is whatever sort of stuff it is that constitutes paradigmatic physical objects, such as trees and rocks. With this understanding of the physical, physicalism could be true, even if panpsychism were true. But, as I will argue later in the paper, this understanding of the physical fails to capture what is at stake in the debate.

[4] Is the Russellian view best thought of as a version of panpsychism? Daniel Stoljar (2006) argues against this. He tells us that people have thought that Russellian monism entails or at least suggests panpsychism because we derive our concept of categoricity from phe- nomenal concepts. He then goes on to argue, that even if this is so, it doesn’t follow that categorical properties are phenomenal. Citing Kripke’s example, he says that one might acquire the concept of a duck from seeing ducks in central park, but our concept of a duck need not be limited only ducks in central park. Moreover, Stoljar argues, it is unclear that we do derive our idea of categoricity from phenomenality. If a categorical property just is, as he assumes, ‘a nondispositional property on which dispositional properties supervene,’

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phenomenal experience, or consciousness. Such a view does not imply that consciousness is fundamental. However, Chalmers would say that as far as the physicalist is concerned, fundamental proto- consciousness is nearly as bad as fundamental consciousness. As he says, the protophenomenal version of Russellian monism, ‘can be seen as a sort of dualism’ since it acknowledges ‘protophenomenal properties as ontologically fundamental, and it retains an underlying duality between structural-dispositional properties (those directly characterized in physical theory) and intrinsic protophenomenal prop- erties (those responsible for consciousness’ (2002, p. 265). Moreover, he claims that the protophenomenal version of the view retains some of the ‘strangeness’ of the phenomenal version of the view since ‘it seems that any properties responsible for constituting consciousness must be strange and unusual properties, of a sort that we might not expect to find in microphysical reality’ (2002, p. 266).

So even if the protophenomenal version of the view does not posit fundamental consciousness, it still results in an antiphysicalistic position, as Chalmers sees it, since (1) it posits fundamental proto- phenomenal properties, (2) it is a form of dualism and (3) proto- phenomenal properties are strange and unusual and not the type of thing we would expect to find in microphysical reality. I think that these last two points can be addressed rather quickly. I do not see dual- ism, in the sense that there are two fundamentally different sorts of substances or properties, as necessarily antiphysicalistic. If, say, dark matter turned out to be composed of something entirely different from ordinary matter, there would be two fundamentally different sorts of things, but this, I would think, should not pose a counterexample to physicalism. And I think that a physicalist should not reject a view merely because it posits strange and unusual properties of a sort that we would not expect to find in microphysical reality; each new revo- lution in physics itself brings with it such properties yet these revolu- tions have not overturned physicalism. The first point, however, is rather more vexing.

Does the protophenomenal version of Russellian monism posit fun- damental protophenomenal properties? This turns on what is to count as ‘protophenomenal’. If the protophenomenal is just whatever it is that serves as a dependence base for the phenomenal, then certainly the view does posit such properties. But all forms of non-reductive physicalism hold that consciousness is ultimately determined by

then the notion of categoricity does not suggest phenomenality (2006, p. 119). This seems correct to me and would seem to apply to the concept of ‘inscrutability’ just as well as categoricity.

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nonconscious properties, and so this alone should not make the view physicalistically suspect. On the other hand if the protophenomenal is supposed to be tainted with the phenomenal, the view may not be to the physicalist’s liking, but such a position is more in line with the panpsychist version of the view than the protophenomenal version.

If, however, Russellian monism posits that these nonconscious properties that form the dependence base for consciousness have no other role than that of determining consciousness, Chalmers suspi- cions that the view is antiphysicalistic seem better grounded. These properties would be protophenomenal because they specifically ground the phenomenal. Typical non-reductive physicalist views are not this like this. For the typical nonreductivist, the fundamental phys- ical world is the dependence base for everything including conscious- ness. Yet the Russellian monist, understood in this way, sees the fundamental properties of physics as the dependence base for rocks, trees, chairs, and tables, indeed, everything except for consciousness and sees inscrutables (perhaps combined with the properties of physics) as forming the dependence base for consciousness. Thus it might seem that positing fundamental protoconsciousness is just as physicalistically suspect as positing fundamental consciousness.

When we understand the position as positing inscrutables that have the sole purpose of grounding consciousness, I think that this may be so. Though even in this case, the answer is not entirely clear. Perhaps if consciousness were merely the result of, say, inscrutables reaching a threshold of complexity, there would seem to be nothing to worry the physicalist. Still, Russellian monism, understood in this way, may best thought of as a borderline case of physicalism. But Russellian monism need not be understood as positing specifically consciousness grounding inscrutables. That is, it need not be understood as proto- phenomenal in the sense of grounding only the phenomenal. Rather, the Russellian can posit that inscrutables form the dependence base for the entire concrete world, only a very small portion of which is mental. The Russellian view of physics leaves us with a highly abstract picture of the world: ‘Our knowledge of the physical world [i.e. the world described by physics]’ Russell tells us, ‘is only abstract and mathematical’ (1946/2004, p.274). Yet, arguably, the world is more than equations; arguably, God, as it were, is not only a pure mathematician, but an applied one as well. And on this way of under- standing the Russellian view, inscrutables ground the applications.

If inscrutables are in this way the substance of the world, if they are, to use Stephen Hawking’s words, what ‘breathes fire into the

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universe for them to describe,’ they are not uniquely important to the mental and so a world with them should be perfectly acceptable to a physicalist (1988, p. 174). This view — that is, the view that every- thing, including minds, is determined in part by inscrutables — posits neither fundamental consciousness nor fundamental protoconsciousness (when the protoconscious is understood as being for the sole purpose of generating consciousness). And it is the view I think is appropriately deemed ‘Russellian physicalism’.

Russellian physicalism is consistent with the failure of upward determination of physics since it holds that duplicating just the funda- mental physics of our world, which we are assuming is entirely struc- tural, duplicates only more structure and not consciousness. If Russellian physicalism were true, a world that duplicates our funda- mental physics yet lacks consciousness would either have inscrutables that differ from those in our world and do not ground con- sciousness or, perhaps, no inscrutables at all.5 Yet Russellian physicalism, I claim, is also a version of physicalism.

Although there is widespread disagreement about how to formulate physicalism, most more or less agree that it holds that all higher-level features of the world are, in some sense, nothing over and above the fundamental features of the world and that all fundamental features of the world are physical. Being nothing over and above is usually explained in terms of a supervenience or determination relation, though finding one such relation that is both necessary and sufficient for physicalism has proved to be no easy task.6 However, since the reasons for thinking that the Russellian view is antiphysicalistic have nothing to do with the supervenience or determination relation it employs, but rather concerns the ontological status of inscrutables, let me merely stipulate that the Russellian holds that all higher-level properties stand in some relation to inscrutables and structurals such that if inscrutables and structurals were physical, the Russellian view would be a version of physicalism. Structurals, we are assuming, are physicalistically acceptable. But what about inscrutables?

I have said that inscrutables are neither mental, nor for the sole pur- pose of creating mentality, and so Chalmers’ worry that they are either

[5] Is an entirely abstract world possible? I am not sure, but some think it is not only possible, but also actual. See, for example, Laydyman et. al. (2007).

[6] For example, one particularly pressing problem is how to formulate a viable thesis of physicalism that is inconsistent with such things as a necessarily existing god and ontolog- ical emergence. For discussion and a proposal on how to avoid this problem see Wilson (1999). Another, though in my view much more tractable problem is how to formulate physicalism if there are no fundamental properties. See

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8 B. Brown and Ladyman (2009) and Montero (2006) for suggestions on how to do this.

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phenomenal or protophenomenal (in any problematic sense) does not arise. Why should certain properties, such as fundamental properties that are mental count as nonphysical? I think that certain properties have been deemed physically unacceptable because they hint at a world that was created with us in mind. If mental phenomena were fundamental, being, for example, part of the original brew that was set in motion in the big bang or as emerging as something extra along the way, mentality would have a place of prominence in the world. And this, I think, for many, suggests that the existence of a God who was looking out for us. This hint, however, is not an implication — the big bang might have created consciousness, itself, without a hand to guide it — so antiphysicalists can be atheists. However, I think that non- physical properties have gotten their ‘bad’ reputation because on many accounts of God, these are the sorts of properties that would exist, if God were to exist. And the reputation remains, even when its origin is forgotten. Inscrutables, as understood as grounding the entire concrete world, do not suggest that the world was created with us in mind, so they should be perfectly physicalistically acceptable.

But perhaps there are other reasons for thinking that they pose a threat to physicalism. It may be that some would say that since inscrutables are fundamental features of the world that are not capable of being fully explained by physics, they should not count as physical. To be sure, inscrutables, as I have defined them, are inscrutable, as it were, to physics. But they are inscrutable to a physics that tells us about only the purely structural features of the world. Yet the physicalist who thinks that everything must be explainable by physics need not be beholden to this notion of physics. Perhaps it is reasonable to think that all physics can and ever will do is provide a structural account of the world. However, given that physics has changed in ways that would have been inconceivable to earlier generations, it seems we should leave open the possibility that physics could, some- day in the unforeseeable future, explain both structural non-structural features of the world. Inscrutables, then, as understood as features of the world that are opaque to a physics that investigates only the purely structural features of the world, may not be opaque to physics under- stood more broadly as investigating the fundamental aspects of the world, whatever they may be.

Apart from this, it is not even clear that being accountable for by physics, even in this broad sense, should be a necessary condition for counting as physical. Physics is a human endeavour and there seems to be little reason for why a physicalist must think that the physical world is understandable, even in principle, to humans. If anything, a

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world that is entirely understandable by us would seem to hint at a world created with us in mind and thus hint at an antiphysicalist view, for although a world created with us in mind is not a necessary feature of any antiphysicalist view, it just may be a sufficient one.7

Another worry might be that inscrutables are much more important to explaining consciousness than to explaining tables and chairs which are pretty well accounted for structurally. Because of this, the objection goes, inscrutables are protophenomenal, after all, since they exist (almost) for the sole purpose of accounting for consciousness. Or in other words, they can be thought of brining consciousness in at the fundamental level since understanding consciousness requires reference to inscrutables, but understanding the rest of the world does not.

But does a structural account of the world provide a good explana- tion of even such things as rocks and tables? On the account I have limned, it does not. It captures how things stand in relation to tables, but not tables themselves. Of course, it seems to us that our structural explanations are very successful in the nonmental realm, but this is just because it is so obvious to us that tables are concrete objects that it does not call for explanation. There being concrete objects is a central feature of their tablehood, yet structural explanations don’t give us this.

Of course, Chalmers is no doubt correct to say that most physicalists would reject the idea that protophenomenal inscrutables of this stripe ground consciousness. They don’t need to, as most physicalists accept other responses to the structural argument. Some think, for example, that that consciousness can be accounted for entirely structurally. Others may deny the Russellian picture of phys- ics. Nonetheless, if what I have argued is correct, these same physicalists should not say that physicalism is false, if it were some- how shown that Russellian physicalism were true.

So it seems that Chalmers’ the structural argument does not imply that consciousness, or even protoconsciousness is fundamental after all. And because of this seems to be perfectly physicalistically acceptable.

IV The Hard Problem

But the question of how inscrutables are supposed to ground con- sciousness remains. This is the problem Chalmers refers to as ‘the

[7] For other arguments for why physicalists should not define the physical over physics see Montero (2009 and 1999).

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hard problem of consciousness’, and it is the problem of explaining how it is possible for creatures like us to be conscious. When it is assumed that our fundamental nature is nonconscious this problem is especially pressing, for how can, as Colin McGinn (1989) once put it, ‘technicolor phenomenology arise out of soggy grey matter’.8

And, indeed, perhaps the main motivation philosophers have had to accept a Russellian view is that in its panpsychist form, it is thought to solve, or at least go a long way toward solving the hard problem since if pan- psychism is true, this soggy gray matter is, at bottom, itself Technicolor.

The panpsychist solution to the hard problem is not entirely straightforward since it leaves us with the problem of explaining how little bits of phenomenality combine to produce the rich unified type of experience that we have, a problem William James refers to as ‘the combination problem.’ Chalmers thinks that even the proto- phenomenal view faces this problem, for as he says, ‘it is not easy to see how a distribution of a large number of individual microphysical systems, each with their own protophenomenal properties, could somehow add up to this rich and specific structure.’ How do we get our inner lives out of some octillion individual particles? ‘Should we not,’ Chalmers asks, ‘expect something more like a disunified, jagged collection of phenomenal spikes? Chalmers sees this as the most seri- ous problem for Russellian monism.

Russellian physicalism does not seem to fall prey to the combina- tion problem since it does not posit that little bits of consciousness must somehow fit together to form consciousness experience. How- ever the problem of how little bits of nonconsciousness can fit together to form experience is, it seems to me, even more difficult.

Some think that panpsychism has no advantage over a physical view when it comes to solving the hard problem. Whether the nature of inscrutables is conscious or nonconscious makes no difference, as they see it, to our ability to understand how consciousness arises in the world. For example, Ned Block (1980) argues that even if what real- ized our protons, electrons and other elementary particles were a race of incredibly small humanlike creatures flying around in spaceships, we would still not see how consciousness could arise, even though consciousness would be part of the fabric of our elementary particles. As Daniel Stoljar (2006) puts it, ‘it seems just as hard to see how one experiential truth can entail another as it is to see how a

[8] We now, of course, have answer to this question: Technicolor phenomenology can’t arise out of soggy grey matter anymore since the intensive three-strip Technicolor colouring processes is typically deemed too expensive.

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nonexperiential truth can entail an experiential truth’ (p. 120). But I am not sure that this is so. Block’s argument does indicate that it is just as difficult to understand how a person who was composed of little people darting around in spaceships could be conscious as it is to understand how something entirely nonmental could be conscious. But this is because when we think of human beings we think of indi- vidual conscious experiences that do not combine to make unified group consciousness. It is something like arguing that carbon dioxide emissions are irrelevant to the explanation of the greenhouse effect because you can imagine a world whose protons were actually miniscule earth like structures creating carbon dioxide emissions in their own atmospheres. Yet the workings of such protons would not help explain the greenhouse effect. But, arguably, carbon dioxide emissions do.

To be sure, the analogy is not exact since panpsychism is a view that is far less well understood than the theory that carbon dioxide emis- sions are relevant to the greenhouse effect. Of particular significance, one would like to know what it means to be mental at the subatomic level and how it is that such mentality could combine to form the sort of unified conscious life that we all experience. Nonetheless pan- psychism seems to alleviate some of the burden of the hard problem. If, say, my table were composed of tiny irreducible solid hard block like structures, explaining why, say, my table is hard, would be easier than explaining what makes it hard given that it is composed mainly of empty space. There would still be some explaining to do — the blocks just fit together in such and such a pattern — but the task would be easier.

Russellian physicalism does not have the advantage of alleviating the hard problem. Rather, it claims that the world is such that we can- not, at least currently, see the solution, for according to Russellian physicalism, consciousness depends on inscrutables, yet inscrutables are just that: inscrutable. As such, Russellian physicalism leaves the explanatory gap wide open.

Nonetheless, Russellian physicalism has the advantage of not need- ing to posit consciousness at the ground level, for the explanatory task is only easier for the panpsychist if we can make sense of what this means for fundamental particles to have a conscious aspect. More- over, in contrast to panpsychism, Russellian physicalism does not result in a world in which you find mentality everywhere. Given pan- psychism, everything — even sticks and stones and the like — has at least some glimmer of consciousness.

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8 B.

But why should we accept the view at all? My aim in this paper has been, not to convince you that Russellian physicalism is true, but rather to show that the structural argument does not imply that con- sciousness is fundamental; Russellian physicalism is consistent with the premises of this argument get does posit fundamental conscious- ness. However, in fact, if you accept the premises of the structural argument yet also think that physicalism of one sort or another must be true, I have also presented an argument for the view since Russellian physicalism is, among the current panoply of solutions to the mind-body problem, the only view that allows you to do both.

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