Insight Editions · No. 360
A Study on the Metaphysics of Conscious Experience
Russellian Panpsychism and the Combination Problem
S. Siddharth
A guide to S. Siddharth's University of Mysore doctoral thesis, which argues that Russellian panpsychism can answer the combination problem through mereological nihilism or existence cosmopsychism, with a reading of Advaita Vedanta.
A study guide to A Study on the Metaphysics of Conscious Experience by S. Siddharth. Shared free for personal reading; not for sale and not endorsed by the authors or publishers. Please read and buy the original.
The Thesis at a Glance
S. Siddharth's doctoral thesis, submitted to the Department of Studies in Philosophy at the University of Mysore in 2020 and supervised by Dr Sangeetha Menon of the National Institute of Advanced Studies, Bengaluru, asks whether panpsychism – the view that experience is a fundamental feature of the physical world – can survive its hardest objection, the combination problem. Its answer is a guarded yes. A Russellian panpsychist who adopts an extreme position on how parts make wholes, either mereological nihilism or existence monism, can explain how human experience fits into the physical world, provided she accepts a cost the thesis calls "epistemic humility". This Insight Edition sets out the argument chapter by chapter, defines its technical vocabulary, maps the positions it compares, and closes with questions for study.
Structure of the Thesis
| Ch. | Title | Role in the argument |
|---|---|---|
| 1 | Introduction | The hard problem, the main options, and the case for panpsychism |
| 2 | Epistemology of Russellian Panpsychism | Physics captures only structural properties; experiences are intrinsic |
| 3 | From Experience to Subjects of Experience | Every experience has a subject; subjects are ontological unities |
| 4 | Composition and Its Problem with Experience | The problem of composition in general; why the extremes are the best bets |
| 5 | The Combination Problem | Panqualityism, constitutive and emergentist responses all fail |
| 6 | Panpsychism and Mereological Nihilism | Only simples exist; a human subject is one simple |
| 7 | Panpsychism and Monism | Cosmopsychism; Goff, Shani and Keppler, Kastrup, and Advaita Vedanta |
| 8 | Conclusion | Two workable views and the price of epistemic humility |
Chapter 1 · The Problem
Why consciousness is hard
The thesis begins with David Chalmers's distinction between the "easy" problems of consciousness – explaining functions such as discrimination, report and attention – and the hard problem: why any of this is accompanied by experience at all, why there is "something it is like" to see red. Physicalist explanations describe structure and dynamics, and structure and dynamics seem to leave experience out. This is the explanatory gap.
The main positions are surveyed: reductive and non-reductive physicalism, dualism, idealism, and panpsychism. Panpsychism is attractive because it avoids two hard pills at once. It does not make experience emerge, mysteriously, from wholly non-experiential matter ("radical emergence"), and it does not posit a second substance that must somehow interact with the physical. Experience is simply part of what matter is.
Its great difficulty is the combination problem, first framed in modern terms by William James: if electrons and quarks each have tiny experiences, how do they add up to one unified human experience? The rest of the thesis is an attempt to answer it.
Chapter 2 · Russellian Panpsychism
Structure and intrinsic nature
Bertrand Russell argued in The Analysis of Matter (1927) that physics tells us about the mathematical structure of the world – how things are related and how they behave – and is silent about what those relata are in themselves. Mass is defined by how it resists acceleration and attracts other masses; charge by how it interacts with fields. These are dispositional, structural descriptions. There must be something that has the structure; physics does not say what.
Russellian monism fills the gap: the intrinsic nature that "realises" physical structure is experiential, or proto-experiential. Physics describes it from the outside; experience is what it is from the inside. Because the experiential properties are the categorical grounds of physical dispositions, they are causally efficacious, which avoids epiphenomenalism.
The chapter's contribution is to examine the epistemology this requires. Structural realists in the philosophy of science share Russell's claim that we know only the structure of the physical world, and both inherit M. H. A. Newman's 1928 objection: pure structure is trivially satisfiable, since any collection with enough members can be arranged to have it. The thesis argues that both need a further notion, experiential-concreteness ("e-concreteness"): the external world must be concrete in the way our experiences are concrete, and we know what that is like through acquaintance with our own experience (the Revelation thesis: having an experience reveals its qualitative character). The chapter also takes up illusionism, the view that Revelation is radically wrong and conscious experiences are illusory, and presses a Newman-like objection against it.
Chapter 3 · Subjects of Experience
No experience without a subject
Galen Strawson's slogan that experience "necessarily involves experiencing" anchors this chapter. An experience is not a free-floating quality; it is always for someone. The thesis considers views that try to do without subjects, including Buddhist and Humean "bundle" theories and Strawson's "thin subjects", which last only as long as a single experience, and argues that even thin subjects are subjects.
Its central technical move is to treat the basic unit not as "an experience" but as a subject-having-experience: a single concrete entity whose qualitative content is unified and private. Three properties define it:
- Qualitative content – the qualities experienced, such as redness or pain.
- Phenomenal unity – it feels some way to experience the various contents together.
- Ontological privacy – the content belongs to this subject and is not shared with any other.
Because the subject is an ontological unity, it cannot be treated as a property of some other individual or as a mere bundle of parts. This is what makes combination so hard: units that are each unified and private cannot be shared or merged without ceasing to be what they are.
Chapter 4 · Composition
The special composition question
Before asking how experiences combine, the thesis asks how anything combines. Peter van Inwagen's "special composition question" asks: under what conditions do some things compose a further thing? When do bricks make a wall, cells an organism, people a nation? There are three broad answers:
| Position | Claim | Experiential version |
|---|---|---|
| Mereological nihilism | Composition never occurs; only simples exist | Mereological-nihilist panpsychism (Chapter 6) |
| Mereological universalism | Composition always occurs; any things compose a whole | Universalist cosmopsychism (rejected) |
| Moderate views | Composition sometimes occurs (e.g. when there is life, or contact) | Constitutive panpsychism (Chapter 5) |
| Existence monism | Only one concrete individual exists, the cosmos | Existence cosmopsychism (Chapter 7) |
| Priority monism | Many things exist, but the cosmos is prior to its parts | Priority cosmopsychism (Chapter 7) |
The chapter argues that moderate views face vagueness and arbitrariness – there seems to be no principled line between composing and not composing – and that the extremes avoid these problems. Its key methodological point is that panpsychists inherit a problem about composition that has nothing to do with consciousness. If they adopt one of the extreme mereological positions, which are the best independent answers to that problem, they may find the combination problem eased as well.
Chapter 5 · The Combination Problem
Many problems, one hard core
Following Chalmers, the combination problem has sub-problems: the quality problem (how a few micro-qualities yield the vast palette of human qualities), the structure problem (how micro-structure maps onto the structure of experience) and the subject problem (how many subjects make one). The thesis argues that the subject problem is the hardest, and that Sam Coleman's and Luke Roelofs's work shows why: unity and privacy are exactly the features that resist combination.
Four families of responses are examined and found wanting:
| Response | Proponents | Why it fails |
|---|---|---|
| Panqualityism | Coleman | Non-subjective qualities are unintelligible, and a subject emerging from them re-opens the explanatory gap |
| Type-I constitutive panpsychism | Roelofs | Weakens what a subject is so that it can be composed, assuming rather than explaining composite subjects |
| Type-II constitutive panpsychism | Goff, Miller | Posits a "phenomenal bonding relation" of which we have no positive conception |
| Synchronic emergentism | Rosenberg, Integrated Information Theory | Cannot give the emergent macro-experience its own causal role |
| Diachronic (fusion) emergentism | Seager, Mørch | Fusion of micro-subjects into a new subject is as unintelligible as radical emergence |
The conclusion of Chapter 5 strengthens Chapter 4: if any answer to the combination problem exists, it will come from nihilism or monism. These are developed in Chapters 6 and 7.
Chapter 6 · Mereological-Nihilist Panpsychism
One simple, one subject
If composition never occurs, there are no composite subjects and nothing needs combining. On mereological-nihilist panpsychism (mn-panpsychism) only physical simples exist, each a subject-having-experience. What, then, is a human subject? The thesis's bold answer: a human subject-having-experience is identical to a single physical simple, located somewhere in the brain.
The obvious worry is that an electron's experience must be simple, while ours is rich. The reply rests on two "causation as content generation" theses. CACG-I: every causal relation a subject-having-experience is a relatum of has an impact on its qualitative content. CACG-II: different causal relations exert different influences on that content. A simple embedded in the dense causal web of a working brain can therefore have complex content, while a simple in a table has very little. Seven objections are then answered:
- Simplicity: simples should have simple content. Reply: content tracks causal neighbourhood, not intrinsic simplicity.
- No fixed electron-feel: two electrons in different settings would feel very different. Reply: physics already treats a particle's behaviour as context-dependent.
- Isomorphism: a Russellian needs structural match, but a quark has simple structure. Reply: the relevant structure is relational, and a brain simple's relational structure is complex.
- Why this simple?: why is only one brain simple the human subject? Reply: other simples have their own, less integrated, experiences; the human subject is the one whose causal neighbourhood matches the structure of human experience.
- Causal weakness: one simple seems too small to drive behaviour. Reply: its causal influence propagates through the network it is embedded in.
- No advantage over dualism: taking the human subject as fundamental explains nothing. Reply: unlike dualism, it identifies the subject with a physical entity and requires no interaction problem.
- Instability: fundamental particles are created and annihilated. Reply: what persists is qualitative content carried through the causal process, which raises questions of personal identity that the thesis treats openly.
The price is epistemic humility: we cannot currently know which simple we are, nor can introspection tell us.
Chapter 7 · Panpsychism and Monism
Cosmopsychism
The alternative is to start from the top. Cosmopsychism holds that the cosmos as a whole is a subject-having-experience. It faces a mirror image of the combination problem, the de-combination problem: how does one cosmic subject give rise to, or appear as, many private, unified human subjects? Two versions are distinguished, following Jonathan Schaffer's types of monism:
- Priority cosmopsychism – many subjects exist but the cosmic subject is prior to them and grounds them. Philip Goff proposes a grounding relation; Itay Shani and Joachim Keppler appeal to a universal field of consciousness modelled on fundamental physics. The thesis argues both face an explanatory gap: no relation is offered that makes intelligible how a private, unified human subject is derived from the cosmic one.
- Existence cosmopsychism – the cosmos is the only concrete individual and the only real subject. In Type I, all experiential qualities, including those we call "ours", are experienced by the cosmic subject, and there are no distinct human subjects. In Type II, the appearance of distinct subjects is itself explained as illusion. Bernardo Kastrup's analytic idealism, with its "dissociated" islands of experience within cosmic consciousness, is read as a Type-I view.
Type-I existence cosmopsychism avoids the de-combination problem because it denies there is anything to de-combine. The objection that it violates the Revelation thesis (since we seem to know we are distinct subjects) is answered: Revelation says only that experiences have qualities and are for a subject, not that the subject is a human one distinct from all others.
Advaita Vedanta as Type-II cosmopsychism
The thesis's most distinctive section reads Advaita Vedanta as a Type-II existence cosmopsychism. Only Brahman, pure consciousness, is ultimately real; individual selves (jivas) are appearances due to avidya, ignorance. The relation is vivarta (apparent change, like a rope seen as a snake) rather than parinama (real transformation, like clay becoming a pot). The empirical world has an indeterminate status, anirvacaniya, "that about which we cannot speak". Advaitins therefore do not face the de-combination problem; they face the task of explaining how illusory subjects can arise in Brahman. Three post-Sankara schools offer three models:
- Ābhāsa-vāda (appearance or semblance theory), associated with Sureśvara, a direct disciple of Śaṅkara: jivas relate to Brahman as the contents of a trance relate to waking reality. Avidya is both the efficient and material cause of the appearance.
- Pratibimba-vāda (reflection theory), of the Vivaraṇa school of Padmapāda and Prakāśātman: selves are Brahman reflected in the adjuncts (upādhis) of the intellect; the reflection is identical to the original, and only the appearance of difference is unreal.
- Avaccheda-vāda (limitation theory), of Vācaspati Miśra's Bhāmatī school: selves are Brahman seemingly limited by adjuncts, as space in a pot is the whole of space; break the pot and nothing is added or lost.
The thesis's verdict, following Gasparri and Roodurmun, is that each analogy works only if avidya and its adjuncts have the special, indeterminate status of being neither real nor unreal. For Advaitins, who accept scripture (śruti) as the sole source of knowledge of Brahman and have soteriological aims, this may be acceptable. For a contemporary Russellian cosmopsychist, it is a brute posit, and so the thesis prefers Type-I existence cosmopsychism to the Advaitic Type-II form.
Chapter 8 · Conclusion
Two survivors and a price
The thesis concludes that Russellian panpsychism can respond to the combination problem in two ways: mereological-nihilist panpsychism and Type-I existence cosmopsychism. Both are internally consistent and avoid the explanatory gaps that sink panqualityism, constitutive panpsychism, emergentism and priority cosmopsychism.
Both, however, face a threat of epistemic humility. On mn-panpsychism we cannot know which simple we are or how its causal neighbourhood fixes its content. On Type-I existence cosmopsychism we cannot know the mechanism by which the single cosmic subject's experience is organised into what seem to be our separate streams. The thesis argues that this humility is a price worth paying, since every rival view either faces the same humility or leaves a deeper gap. It ends by pointing to further work: personal identity on mn-panpsychism, the role of physics in identifying the human simple, and comparative work with Indian philosophical traditions.
Study Aids
Glossary
| Term | Meaning |
|---|---|
| Hard problem | Why physical processes are accompanied by experience at all |
| Panpsychism | Experience is a fundamental and ubiquitous feature of the physical world |
| Russellian monism | Physics describes structure; experience (or proto-experience) is the intrinsic nature that realises it |
| Revelation | Having an experience reveals its qualitative character |
| Subject-having-experience | The thesis's basic unit: a concrete entity with unified, private qualitative content |
| Special composition question | Van Inwagen's question: when do some things compose a further thing? |
| Mereological nihilism | Composition never occurs; only simples exist |
| Existence / priority monism | Only the cosmos exists / the cosmos is prior to its parts |
| Combination problem | How micro-experiences or micro-subjects yield macro-experience or a macro-subject |
| De-combination problem | How a cosmic subject gives rise to or appears as many subjects |
| Radical emergence | Emergence of experience from wholly non-experiential matter, judged unintelligible |
| Epistemic humility | Admitting that some facts about experience are not knowable by us |
| Vivarta / pariṇāma | Apparent change (rope–snake) / real transformation (clay–pot) |
| Anirvacanīya | Indeterminate: neither real nor unreal |
Thinkers Discussed
Bertrand Russell, Arthur Eddington, David Chalmers, Galen Strawson, Philip Goff, Sam Coleman, Luke Roelofs, Gregory Miller, William Seager, Hedda Hassel Mørch, Gregg Rosenberg, Giulio Tononi (IIT), Peter van Inwagen, Jonathan Schaffer, Itay Shani and Joachim Keppler, Bernardo Kastrup, Yujin Nagasawa and Khai Wager, and, from the Indian tradition, Śaṅkara, Sureśvara, Padmapāda, Prakāśātman and Vācaspati Miśra, read through Karl Potter, Roodurmun and Balasubramanian and Revathy.
A Critical Note
The thesis is careful and clearly structured, and its use of mereology to sort responses to the combination problem is its most useful contribution. Readers should weigh three points. The identification of a human subject with a single simple in the brain is unusual and faces empirical questions the thesis acknowledges but cannot settle. The verdict on Advaita treats it as a metaphysical theory to be judged on contemporary terms; Advaitins would reply that the status of avidya is a consequence of their epistemology, not an arbitrary posit. And both preferred views make epistemic humility a virtue, which critics may see as relabelling an explanatory gap rather than closing it.
Questions for Study
Why does the thesis treat composition in general before the combination problem?
Because panpsychists inherit the general question of when parts compose wholes. Choosing the best independent answer to it (an extreme view) may reduce or remove the combination problem.
Which sub-problem of combination is hardest, and why?
The subject combination problem, because subjects are phenomenally unified and ontologically private, and these are exactly the features that resist being shared or merged.
How can a single simple have complex experience on mn-panpsychism?
Because its qualitative content is fixed by the causal relations it stands in. A simple embedded in a brain's dense causal network can have content as structured as that network.
Why does Type-I existence cosmopsychism avoid the de-combination problem?
It holds that the cosmic subject is the only subject. There are no distinct human subjects to be derived, only qualities experienced by the cosmic subject.
What do the three Advaita models have in common, according to the thesis?
Each requires that avidya and its adjuncts be anirvacanīya, neither real nor unreal, which a contemporary Russellian must accept as a brute posit.
What is "epistemic humility" in this argument?
The acknowledgement that, on either surviving view, some facts about how our experience is constituted cannot be known by us.
About this book
A Study on the Metaphysics of Conscious Experience: Russellian Panpsychism and the Combination Problem by S. Siddharth, 2020. This is a chapter-by-chapter study of the book, with summaries, maps, tables and diagrams; short quotations keep their page references. It is shared free for personal study, is not for sale, and is not endorsed by the author or publisher. Please read and buy the original.
Insight Editions · rajeshrmahapatra.com/insight-editions