Head to head
Hoffman’s Conscious Realism vs Spinoza’s One Reality
Hoffman’s Conscious Realism: The Case Against Reality and Spinoza’s One Reality: Embodied Mind and Graded Consciousness, compared field by field from their entries in the Atlas.
At a glance
- Hoffman’s Conscious Realism belongs to the Idealism family in Kuhn's Landscape of Consciousness, Spinoza’s One Reality to Neutral Monism.
- Both treat consciousness as fundamental.
- They give the same kind of answer on meaning and purpose.
- On AI consciousness, Hoffman’s Conscious Realism says “Likely” and Spinoza’s One Reality says “Conditional”.
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The claim
In brief
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.
Spinoza’s One RealityBaruch Spinoza holds that there is only one substance, God or Nature, known to us under two attributes, thought and extension. A human mind is the idea of an actually existing human body: one and the same thing as the body, conceived under thought. Because every body has a corresponding idea, mind runs through all of nature, and consciousness varies by degree with the complexity and power of the body.
What consciousness is
Hoffman’s Conscious RealismConsciousness is identified as the fundamental reality, structured as a vast social network of interacting 'conscious agents' and their experiences.
Spinoza’s One RealityThe mind is the idea of the body, the same individual conceived under the attribute of thought rather than extension. Spinoza does not single out phenomenal consciousness as a category; his interpreters read consciousness as higher-order awareness, cognitive access, power or complexity of thinking, or affective awareness.
Big questions
Can AI be conscious?Differ
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.
Spinoza’s One RealityConditionalSince every body has a corresponding mind whose richness tracks the body's complexity and power, a sufficiently complex artificial body would have a correspondingly rich mind; whether that mind would be conscious in the human sense is contested.
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.
Spinoza’s One RealityNo position
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.
Spinoza’s One RealityNo position
Does it give life meaning?Both agree
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.
Spinoza’s One RealityCosmic/UltimateMinds are modes of God or Nature, and freedom lies in understanding the causal order of Nature through more adequate ideas.
Nature of mind
Ontology
Hoffman’s Conscious RealismIdealism
Spinoza’s One RealitySubstance monism (dual-attribute)
Mind and body
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.
Spinoza’s One RealityMind and body neither interact nor merely correlate; they are one thing under two descriptions. ‘The order and connection of ideas is the same as the order and connection of things’ (Ethics 2p7), so thought is explained only through thought and extension only through extension.
Fundamental or emergent
Hoffman’s Conscious RealismPrimitive
Spinoza’s One RealityPrimitive
Qualia
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.
Spinoza’s One RealitySpinoza has no explicit theory of phenomenal character. Interpreters reconstruct it from his accounts of sensation, imagination and affect, where an affect is both a change in the body's power of acting and the idea of that change.
How it works
Mechanism
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.
Spinoza’s One RealityPsychophysical identity under parallel attributes: whatever happens in the body as extension happens in the mind as an idea, so no causal bridge between them is needed.
Where it is
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).
Spinoza’s One RealityMentality is everywhere in nature, since all individuals are ‘animate’ in some degree (2p13s). Whether this means every physical thing has phenomenal experience is contested, and Spinoza does not treat God or Nature as one human-like conscious subject.
What it does
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.
Spinoza’s One RealityMind never causes bodily motion and body never causes thought. Affects make ideas matter to behavior by increasing, decreasing or fixing the mind's striving, and freedom comes from forming more adequate ideas of the causes acting on us.
Evidence and criticism
Testability
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).
Spinoza’s One RealitySpeculative
Tests so far
Hoffman’s Conscious RealismNot stated
Spinoza’s One RealityNot stated
Criticisms
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.
Spinoza’s One RealityThe identity formula says mind and body are one thing but not what makes the thought side felt. The ideas-of-ideas reading makes every idea conscious, which Bennett called absurdly excessive, and LeBuffe notes that a mind's overall power and the power of its ideas can diverge, giving odd verdicts on degrees.
Sources
Key sources
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)
Spinoza’s One Reality
- Ethics, Baruch Spinoza (E. Curley, Ed. and Trans., The Collected Works of Spinoza) (1677)
- Spinoza’s Metaphysics: An Essay in Interpretation, E. Curley (1969)
- A Study of Spinoza's Ethics, J. Bennett (1984)