Head to head
Chalmers’s Panpsychism vs Hoffman’s Conscious Realism
Chalmers’s Panpsychism and Hoffman’s Conscious Realism: The Case Against Reality, compared field by field from their entries in the Atlas.
At a glance
- Chalmers’s Panpsychism belongs to the Panpsychism family in Kuhn's Landscape of Consciousness, Hoffman’s Conscious Realism to Idealism.
- Both treat consciousness as fundamental.
- On AI consciousness, Chalmers’s Panpsychism says “Conditional” and Hoffman’s Conscious Realism says “Likely”.
- On life after death, Chalmers’s Panpsychism says “Uncertain” and Hoffman’s Conscious Realism says “Likely”.
- On mind uploading, Chalmers’s Panpsychism says “Uncertain” and Hoffman’s Conscious Realism says “Likely”.
- On meaning and purpose, Chalmers’s Panpsychism says “Uncertain” and Hoffman’s Conscious Realism says “Cosmic/Ultimate”.
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The claim
In brief
Chalmers’s PanpsychismDavid Chalmers argues that consciousness may be a fundamental feature of physical reality, carried by the intrinsic properties of its most basic entities. He treats panpsychism, and its cousin panprotopsychism, as a synthesis of materialism and dualism, and holds that it would become the most promising answer to the mind-body problem if someone solves the combination problem.
Hoffman’s Conscious RealismThis theory asserts that evolution selects for survival and reproductive fitness, not for veridical perception of reality; consequently, spacetime and physical objects function merely as an 'interface' or illusion guiding adaptive behavior. Ultimate reality is fundamentally composed of interacting conscious agents and their experiences, which are primary to, and generative of, the physical world.
What consciousness is
Chalmers’s PanpsychismChalmers identifies consciousness with the intrinsic properties of fundamental physical entities, the categorical bases of the dispositions that physics describes. Physics tells us what basic entities do; on this view, phenomenal or protophenomenal properties are what they are.
Hoffman’s Conscious RealismConsciousness is identified as the fundamental reality, structured as a vast social network of interacting 'conscious agents' and their experiences.
Big questions
Can AI be conscious?Differ
Chalmers’s PanpsychismConditionalSince every physical system has phenomenal or protophenomenal properties at its base, an AI is built from the same ingredients as a brain. Whether it forms a unified conscious subject depends on how the unsolved combination problem is answered.
Hoffman’s Conscious RealismLikelyAs consciousness is fundamental (Idealism), it is not restricted to biological matter. If an artificial system achieves the organizational complexity characteristic of a 'conscious agent', it could potentially tap into the fundamental consciousness field, regardless of its physical substrate.
Chalmers’s PanpsychismUncertainThe fundamental properties outlast any body, but nothing in the view says whether the particular combined subject survives once the brain's structure breaks down.
Hoffman’s Conscious RealismLikelySince consciousness is fundamental and generates the physical interface, the individual conscious agent is likely to persist beyond the disintegration of the biological body/interface.
Chalmers’s PanpsychismUncertainAn upload would be made of the same fundamental properties, but whether it reconstitutes the same subject turns on the unsolved combination problem.
Hoffman’s Conscious RealismLikelyIf the brain is merely an interface for fundamental consciousness, virtual immortality becomes a matter of reproducing the necessary structures or functions (the 'icon' or interface) needed to manifest the individual conscious agent in a non-biological medium.
Chalmers’s PanpsychismUncertainPlacing experience in the basic fabric of nature gives it a cosmic footing, but Chalmers draws no conclusions about meaning or purpose.
Hoffman’s Conscious RealismCosmic/UltimateIdealism fundamentally supports ultimate meaning and purpose. Reality is composed of interacting conscious agents whose existence and actions (influencing other agents) imply inherent value and purpose.
Nature of mind
Ontology
Chalmers’s PanpsychismPanpsychism (Russellian monism)
Hoffman’s Conscious RealismIdealism
Mind and body
Chalmers’s PanpsychismMind and matter are two sides of one fundamental stuff that has both physical and phenomenal properties. Chalmers places this ‘monism’ in the sixth of his six classes of views, the nonreductive ones that expand or reconceive physical ontology.
Hoffman’s Conscious RealismConsciousness is fundamental and creates spacetime and objects, reversing the conventional arrow of causation. Brain activity correlates with mental states because consciousness creates the brain activity/physical world interface.
Fundamental or emergent
Chalmers’s PanpsychismPrimitive
Hoffman’s Conscious RealismPrimitive
Qualia
Chalmers’s PanpsychismQualia are real and irreducible. In the panpsychist version they exist in simple form at the fundamental level; in the panprotopsychist version, basic entities have protophenomenal properties that are not themselves experiences but can ground them.
Hoffman’s Conscious RealismQualia are implied to be the fundamental experiences inherent to the conscious agents, which are then translated into simplistic icons (like colors or objects) within the spacetime interface.
How it works
Mechanism
Chalmers’s PanpsychismChalmers reasons dialectically. Materialism (thesis) meets dualism (antithesis) and yields panpsychism; panprotopsychism challenges it and yields Russellian monism; the combination problem then challenges Russellian monism, with no settled resolution yet.
Hoffman’s Conscious RealismThe principle of evolution favoring fitness over veridical perception leads to the construction of a simplified, illusionary 'interface' (spacetime and physical objects) that guides adaptive behavior.
Where it is
Chalmers’s PanpsychismThroughout physical reality, at the level of its most basic entities.
Hoffman’s Conscious RealismConsciousness is fundamental in the universe. It is not a product of space and time or anything inside space and time; spacetime is merely a format for conscious experiences (the interface).
What it does
Chalmers’s PanpsychismBecause phenomenal or protophenomenal properties are the categorical bases of physical dispositions, consciousness sits at the base of physical causation itself.
Hoffman’s Conscious RealismConsciousness is causally fundamental. The functional role of the perceived physical world is solely to enhance fitness and reproductive success by guiding behavior.
Evidence and criticism
Testability
Chalmers’s PanpsychismConceptually testable
Hoffman’s Conscious RealismHighly speculative/ontological. Conceptually testable via the mathematical formulation of consciousness agents. Empirical evidence relies on common perceptual illusions (reinterpreted to support Idealism).
Tests so far
Chalmers’s PanpsychismNot stated
Hoffman’s Conscious RealismNot stated
Criticisms
Chalmers’s PanpsychismThe combination problem is the central difficulty, and Chalmers concedes it is unsolved. He also calls panpsychism initially counterintuitive, holding that the sense of oddity fades on reflection.
Hoffman’s Conscious RealismCriticized for interpreting empirical evidence (like user illusions) diametrically opposite to materialist accounts (such as Dennett's and Graziano's eliminative materialism). It requires reversing the conventional causal relationship between brain and mind.
Sources
Key sources
Chalmers’s Panpsychism
- Chalmers’s Panpsychism, David Chalmers (Landscape of Consciousness entry)
Hoffman’s Conscious Realism
- The Case against Reality: How Evolution Hid the Truth from Our Eyes, D. Hoffman (2019)
- Conscious realism and the mind-body problem, D. Hoffman (2008)
- Fact, fiction, and fitness, C. Prakash, C. Fields, D.D. Hoffman, R. Prentner, M. Singh (2020)