Head to head
Free Energy Principle vs Hoffman’s Conscious Realism
Friston’s free-energy principle and active inference and Hoffman’s Conscious Realism: The Case Against Reality, compared field by field from their entries in the Atlas.
At a glance
- Free Energy Principle belongs to the Materialism family in Kuhn's Landscape of Consciousness, Hoffman’s Conscious Realism to Idealism.
- Free Energy Principle treats consciousness as emergent; Hoffman’s Conscious Realism treats it as fundamental.
- They give the same kind of answer on AI consciousness and mind uploading.
- On life after death, Free Energy Principle says “No” and Hoffman’s Conscious Realism says “Likely”.
- On meaning and purpose, Free Energy Principle says “Humanistic only” and Hoffman’s Conscious Realism says “Cosmic/Ultimate”.
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The claim
In brief
Free Energy PrincipleThis theory conceptualizes consciousness as a natural process arising from the minimization of 'free energy,' which is the difference between an organism's internal model (perceptual expectations) and real-time sensory inputs. Consciousness, therefore, functions as the evolved mechanism for simulating scenarios of the world and reducing prediction error to ensure survival and maintain homeostasis.
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
Free Energy PrincipleConsciousness is identified as a natural process of inference, specifically the internal emergent model that monitors and minimizes the free energy principle (surprise), thereby optimizing the representational capacities of physical/brain systems.
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?Both agree
Free Energy PrincipleYesAs a strong materialist theory, if consciousness is fully explained by computational processes of inference and representation minimization, then non-biological systems capable of executing these processes must eventually attain consciousness in principle.
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.
Free Energy PrincipleNoConsciousness is an emergent natural process tied directly to the functional dynamics and physical substrate of the biological brain; thus, it cannot survive bodily decay.
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.
Could a mind be uploaded?Both agree
Free Energy PrincipleYesSince consciousness is understood as an emergent, formalized process of inference optimization, perfect duplication of the brain's information processing and representational dynamics in a non-biological medium should be sufficient for the continuation of the mental self.
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.
Free Energy PrincipleHumanistic onlyThe foundational imperative of the conscious process is survival (minimizing surprise/maintaining homeostasis). The theory does not rationalize ultimate cosmic meaning or purpose, aligning with general materialist perspectives.
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
Free Energy PrinciplePhysicalism; often referred to as Markovian Monism, which views mind/matter distinction as dialectical rather than ontological.
Hoffman’s Conscious RealismIdealism
Mind and body
Free Energy PrincipleMonistic/Identity. The theory proposes that consciousness is the natural outcome of the physical/brain system's self-organizing processes, dissolving familiar dialectics between mind and matter.
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
Free Energy PrincipleEmergent
Hoffman’s Conscious RealismPrimitive
Qualia
Free Energy PrincipleThe theory is highly deflationary regarding the Hard Problem, treating consciousness as a process to be understood rather than a 'thing' whose qualitative attributes need definition. Qualia, if acknowledged, would be epiphenomena or aspects of the internal generative model required for inference.
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
Free Energy PrincipleThe Free-Energy Principle (FEP), which states that all self-organizing systems must minimize free energy (or 'surprise'), driving action and perception through active inference.
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
Free Energy PrincipleLocalized in the physical brain system; cortical responses are seen as the brain’s attempt to minimize free energy.
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
Free Energy PrincipleConsciousness serves an adaptive and functional role as the evolved mechanism for simulating scenarios, monitoring, and minimizing free energy to promote survival (homeostasis) and navigate the world.
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
Free Energy PrincipleConceptually and empirically linked to testable models (e.g., in neurobiology and psychology) through its reliance on formalizing representational capacities of physical systems.
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
Free Energy PrincipleThe principles of FEP form the basis for models utilized in empirical work concerning altered states (e.g., the Entropic Brain Hypothesis under psychedelics) and related theories of perception and cognition.
Hoffman’s Conscious RealismNot stated
Criticisms
Free Energy PrincipleCriticized for being highly deflationary and difficult to reconcile with the first-person reality of phenomenal experience (the Hard Problem), viewing consciousness merely as a mathematical process or 'natural outcome.' Friston finds engaging with the philosophical premise of consciousness as a 'thing' difficult.
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
Free Energy Principle
- A theory of cortical responses, K. Friston (2005)
- Active interference: a process theory, K. Friston et al (2017)
- The Mathematics of Mind-Time, K. Friston (2017)
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)