Head to head
Hoffman’s Conscious Realism vs Tegmark’s State of Matter
Hoffman’s Conscious Realism: The Case Against Reality and Tegmark’s State of Matter, 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, Tegmark’s State of Matter to Neutral Monism.
- Hoffman’s Conscious Realism treats consciousness as fundamental; Tegmark’s State of Matter treats it as emergent.
- They give the same kind of answer on AI consciousness and mind uploading.
- On life after death, Hoffman’s Conscious Realism says “Likely” and Tegmark’s State of Matter says “No”.
- On meaning and purpose, Hoffman’s Conscious Realism says “Cosmic/Ultimate” and Tegmark’s State of Matter says “Humanistic only”.
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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.
Tegmark’s State of MatterTegmark proposes that consciousness can be understood as a specific state of matter, coined 'perceptronium,' which is defined by distinctive information-processing abilities. Starting from the premise that all existence is physical, the theory seeks principles that distinguish conscious, complex information processing from non-conscious processing.
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.
Tegmark’s State of MatterConsciousness is identified as the subjective experience or 'feeling' that arises when information is being processed in certain complex ways, constituting the state of matter termed 'perceptronium'.
Big questions
Can AI be conscious?Both agree
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.
Tegmark’s State of MatterYesThe theory is strictly physicalist ('It's all physics') and defines consciousness as a state of matter achievable through complex information processing. Therefore, artificial systems can achieve this state in principle.
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.
Tegmark’s State of MatterNoConsciousness is an emergent state of matter (perceptronium) of the physical brain. The irreversible death and dissolution of the physical substrate would entail the cessation of consciousness.
Could a mind be uploaded?Both agree
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.
Tegmark’s State of MatterLikelyIf consciousness is a specific informational state of matter defined by mathematical/physical principles, that state could potentially be perfectly duplicated or uploaded into a non-biological medium by advanced technology.
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.
Tegmark’s State of MatterHumanistic onlyThe foundation in physics and mathematical structure typically suggests no ultimate cosmic purpose, consistent with deflationary physicalist views. The theory does not explicitly propose cosmic teleology.
Nature of mind
Ontology
Hoffman’s Conscious RealismIdealism
Tegmark’s State of MatterPhysicalism / Monism
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.
Tegmark’s State of MatterAn identity relationship is implied, where subjective experience (mind) is identified as a specific physical state (a state of matter/information processing).
Fundamental or emergent
Hoffman’s Conscious RealismPrimitive
Tegmark’s State of MatterEmergent
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.
Tegmark’s State of MatterQualia are implicitly the 'feeling' (subjective experience) associated with perceptronium's specific information processing configurations, formalized through four principles: information, integration, independence, and dynamics.
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.
Tegmark’s State of MatterThe definition of perceptronium via the application of four distinct principles (information, integration, independence, and dynamics) to information processing in physical systems.
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).
Tegmark’s State of MatterLocalized to physical systems (e.g., neural networks or arbitrary quantum systems) that achieve the specific information-processing criteria defining perceptronium.
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.
Tegmark’s State of MatterConsciousness is crucial for information assessment and is viewed as functionally important for critical needs like caring for comatose patients or communicating with advanced AI. Causation is strictly physical.
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).
Tegmark’s State of MatterEmpirically testable
Tests so far
Hoffman’s Conscious RealismNot stated
Tegmark’s State of MatterThe generalization of Integrated Information Theory implies relevance to IIT's measurement function (quantifying degrees of consciousness). The theory is intended to address concrete problems like assessing comatose patients and advanced AI.
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.
Tegmark’s State of MatterAs a generalization of IIT, it inherits existing critiques, such as the difficulty in explaining subjective feeling purely through physical and informational principles.
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)
Tegmark’s State of Matter
- Consciousness is a state of matter (2015)
- Our Mathematical Universe: My Quest for the Ultimate Nature of Reality (2014)