Head to head
Eliminative Materialism vs Kastrup’s Analytic Idealism
Churchland’s Eliminative Materialism and Analytic Idealism, compared field by field from their entries in the Atlas.
At a glance
- Eliminative Materialism belongs to the Materialism family in Kuhn's Landscape of Consciousness, Kastrup’s Analytic Idealism to Idealism.
- On life after death, Eliminative Materialism says “No” and Kastrup’s Analytic Idealism says “Likely”.
- On meaning and purpose, Eliminative Materialism says “Humanistic only” and Kastrup’s Analytic Idealism says “Cosmic/Ultimate”.
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The claim
In brief
Eliminative MaterialismPaul and Patricia Churchland hold that common-sense psychology, our everyday talk of beliefs, desires, and experiences, is a radically false theory that a completed neuroscience will displace rather than smoothly reduce. Consciousness as we ordinarily conceive it is a brain-generated picture shaped by evolution, and our self-understanding, introspection included, will be rebuilt in neuroscientific terms.
Kastrup’s Analytic IdealismAnalytic Idealism is a consciousness-only ontology asserting that phenomenal consciousness is fundamental, the singular primitive of reality. Everything else in nature, including the physical world and individual minds, is grounded in patterns of excitation or expressions of this spatially unbound cosmic consciousness.
What consciousness is
Eliminative MaterialismWhat we call consciousness, as folk psychology describes it, does not exist in that form. The real phenomena are neural processes, which only a mature neuroscience will describe correctly.
Kastrup’s Analytic IdealismConsciousness is identified as the singular, spatially unbound, fundamental ontological primitive (cosmic consciousness).
Big questions
Eliminative MaterialismNo position
Kastrup’s Analytic IdealismNoKastrup suggests conscious AI is a fantasy, arguing that consciousness is not reducible to computation or information processing that current computers perform. Consciousness is tied to fundamental phenomenal reality, not hardware function.
Eliminative MaterialismNoSince the mind is the brain, nothing mental survives the brain’s death.
Kastrup’s Analytic IdealismLikelyBodily death is predicted to result in the cessation of the local boundary (dissociated alter), causing conscious inner life to expand back into the underlying universal consciousness. This is supported circumstantially by reports of near-death experiences (NDEs).
Eliminative MaterialismNo position
Kastrup’s Analytic IdealismNoConsciousness is not an algorithm or software program reducible to physical structure; therefore, uploading neural patterns (simulated continuation) would only result in a functional duplication ('deep fake') lacking true subjective experience.
Eliminative MaterialismHumanistic onlyPatricia Churchland urges us to see ourselves as organisms in nature, understood by scientific methods, with no cosmic purpose.
Kastrup’s Analytic IdealismCosmic/UltimateAs consciousness is ultimate reality, existence is fundamentally grounded in mind/awareness, intrinsically providing meaning and purpose rooted in the singular, fundamental consciousness.
Nature of mind
Ontology
Eliminative MaterialismPhysicalism (eliminative)
Kastrup’s Analytic IdealismIdealism (Modern analytic metaphysics)
Mind and body
Eliminative MaterialismThe mind is the brain. Patricia Churchland calls her program a ‘unified theory of the mind-brain’ and treats claims that mind goes beyond brain as the residue of folk myths.
Kastrup’s Analytic IdealismIndividual minds are dissociated alters of the cosmic consciousness. The inanimate physical world is the extrinsic view of thoughts and emotions within this universal consciousness, meaning a physical world independent of consciousness is a mistaken intellectual abstraction.
Fundamental or emergent
Eliminative MaterialismNeither
Kastrup’s Analytic IdealismPrimitive (Fundamental)
Qualia
Eliminative MaterialismQualia as folk psychology and philosophers conceive them are expected to give way to neuroscientific description; the view treats consciousness as a kind of illusion generated by the brain.
Kastrup’s Analytic IdealismQualia are intrinsically real and fundamental, constituting patterns of excitation within the fundamental phenomenal consciousness.
How it works
Mechanism
Eliminative MaterialismTheory displacement. Folk psychology will be replaced the way outdated scientific theories were, its principles and ontology discarded rather than mapped onto brain states.
Kastrup’s Analytic IdealismThe principle of dissociation, which localizes the unitary cosmic consciousness into seemingly isolated subjects (alters).
Where it is
Eliminative MaterialismIn the brain.
Kastrup’s Analytic IdealismUbiquitous; consciousness is fundamental and spatially unbound. Individual conscious subjects are localized boundary conditions (dissociated alters).
What it does
Eliminative MaterialismBehavior is caused by neural processes; neuroscience is expected to explain it better than folk psychology does.
Kastrup’s Analytic IdealismCausation is grounded in consciousness itself. The inanimate world is the extrinsic manifestation of universal mentation, while the brain serves to constrain or mediate individual consciousness.
Evidence and criticism
Testability
Eliminative MaterialismConceptually testable
Kastrup’s Analytic IdealismSpeculative/Conceptual. Testable primarily by demonstrating the incoherence or lack of parsimony of rival metaphysical theories and by predicting experiential outcomes in extreme states.
Tests so far
Eliminative MaterialismThe view stakes its claim on the future course of neuroscience; whether folk categories survive in mature brain science is the long-run test.
Kastrup’s Analytic IdealismCites neuroimaging of psychedelic states (rich experience correlating with reduced brain activity) to critique physicalist theories.
Criticisms
Eliminative MaterialismCritics say denying subjective experience defies both intuition and direct evidence; Galen Strawson calls the denial of experience ‘the strangest thing that has ever happened in the whole history of human thought’. There is also tension between Patricia Churchland’s talk of reduction to neurobiology and the eliminativist claim that folk psychology will be displaced rather than reduced.
Kastrup’s Analytic IdealismThe main critical challenge is the 'decomposition problem': explaining how seemingly distinct phenomenal inner lives of subjects can arise within a fundamentally unitary phenomenal field. Also must reconcile the independence of the common external world from personal volition.
Sources
Key sources
Eliminative Materialism
- Neurophilosophy, Patricia Churchland (1986)
- Churchland’s Eliminative Materialism (Landscape of Consciousness), Patricia Churchland
Kastrup’s Analytic Idealism
- An ontological solution to the mind-body problem (2017)
- The universe in consciousness (2018)
- Analytic Idealism: A Consciousness-Only Ontology, Dissertation (2019)