Head to head
Searle’s Biological Naturalism vs Seth’s Beast Machine Theory
Searle’s Biological Naturalism and Seth’s “Beast Machine” Theory, compared field by field from their entries in the Atlas.
At a glance
- Both belong to the Materialism family in Kuhn's Landscape of Consciousness.
- Both treat consciousness as emergent.
- They give the same kind of answer on life after death, mind uploading and meaning and purpose.
- On AI consciousness, Searle’s Biological Naturalism says “Conditional” and Seth’s Beast Machine Theory says “Likely”.
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The claim
In brief
Searle’s Biological NaturalismBiological Naturalism posits that consciousness is a real, irreducible, subjective biological feature of the brain, entirely caused by lower-level neurobiological processes and realized as higher-level system features. This approach seeks to solve the mind-body problem by accepting the scientific worldview while acknowledging the first-person ontology of conscious experience.
Seth’s Beast Machine TheoryThis theory posits that conscious experiences, including perceptions of the world and the self, are forms of brain-based perceptual prediction, metaphorically termed 'controlled hallucinations' . It roots the mechanism of consciousness in the fundamental biological imperative to regulate bodily physiology in order to stay alive .
What consciousness is
Searle’s Biological NaturalismConscious states are identified as real parts of the real world that are higher-level, system features of the brain, defined as states of awareness, sentience, or feeling that persist during wakefulness.
Seth’s Beast Machine TheoryConsciousness is identified as forms of brain-based perceptual prediction, where phenomenological properties are explained by the computational aspects of different forms of prediction .
Big questions
Can AI be conscious?Differ
Searle’s Biological NaturalismConditionalSearle rejects consciousness via simulation (Chinese Room Argument) but argues that if the causally sufficient biological mechanism is known, an artificial machine that implements that same mechanism could be conscious, as consciousness does not strictly require biological neurons, only sufficient causal power.
Seth’s Beast Machine TheoryLikelyAs a materialist theory focusing on computational and information-processing mechanisms (perceptual prediction) , AI systems that instantiate similar complex mechanisms should be capable of achieving consciousness .
Does consciousness survive death?Both agree
Searle’s Biological NaturalismNoConsciousness is entirely physical and solely the product of biological brains; therefore, death of the brain and body means irrevocable, permanent non-existence.
Seth’s Beast Machine TheoryNoConsciousness is a product of biological brains and complex, physically instantiated predictive machinery . The death of the brain leads to the irrevocable and permanent non-existence of personal consciousness .
Could a mind be uploaded?Both agree
Searle’s Biological NaturalismYesIf consciousness is entirely explainable by physical/biological states, then duplicating those states (and their causal relations) in a non-biological medium would, in principle, allow for the uploading and continuation of the first-person mental self.
Seth’s Beast Machine TheoryYesIf consciousness is entirely explicable by the computational processes of the brain , then, in principle, the first-person mental self could be duplicated and instantiated in a non-biological substrate, enabling virtual immortality .
Does it give life meaning?Both agree
Searle’s Biological NaturalismHumanistic onlyAs a materialist theory, Biological Naturalism struggles to rationalize ultimate cosmic meaning or purpose, though humanistic meaning created by ourselves remains possible.
Seth’s Beast Machine TheoryHumanistic onlyCategorized as a Materialism Theory, it implies no ultimate or cosmic meaning or purpose, although it supports human-created meaning and value derived from individual agency and experience .
Nature of mind
Ontology
Searle’s Biological NaturalismPhysicalism (Biological Naturalism). It holds that consciousness is part of nature as a subjective, qualitative biological property, rejecting attempts to 'naturalize' it by denying its subjective ontology.
Seth’s Beast Machine TheoryPhysicalism / Materialism (Justified by its classification under Materialism Theories and its reliance on biological and computational explanations) .
Mind and body
Searle’s Biological NaturalismConscious states are causally reduced to lower-level brain processes (causal reducibility), but are ontologically irreducible to these processes because consciousness has a subjective (first-person) ontology while its basis has an objective (third-person) ontology.
Seth’s Beast Machine TheoryConscious experiences are entirely brain-based and physically instantiated . The model supports a strong correlation or identity theory, where conscious properties arise from the physiological and computational architecture geared toward bodily regulation .
Fundamental or emergent
Searle’s Biological NaturalismEmergent
Seth’s Beast Machine TheoryEmergent
Qualia
Searle’s Biological NaturalismConscious states are inherently qualitative, in the sense that there is a distinct qualitative feel to being in any particular conscious state, and this qualitative feel is a real and irreducible part of the world.
Seth’s Beast Machine TheoryThe phenomenological properties of conscious experiences are explained by the computational aspects of the different forms of perceptual prediction utilized by the brain .
How it works
Mechanism
Searle’s Biological NaturalismThe principle is that all conscious states are reliably and universally caused by lower-level brain processes and realized as system features, functioning as a real biological machine.
Seth’s Beast Machine TheoryConsciousness is explained through predictive processing, where the brain generates a constant 'best guess' (prediction) of the causes of its sensory inputs . This mechanism is intrinsically tied to the regulation of bodily physiology .
Where it is
Searle’s Biological NaturalismLocalized in the biological brain, specifically realized in the brain as higher-level or system features.
Seth’s Beast Machine TheoryLocated in the biological brain, tied to the predictive machinery that regulates bodily physiology .
What it does
Searle’s Biological NaturalismConscious states function causally (causal efficacy) as real parts of the real world, providing a basis for intentional action and interaction with the environment.
Seth’s Beast Machine TheoryConsciousness has a functional role tied to survival . It facilitates the regulation of bodily physiology and allows the organism to model, predict, and simulate the causes of sensory inputs .
Evidence and criticism
Testability
Searle’s Biological NaturalismEmpirically testable in principle, as the theory requires finding the exact causal details of how lower-level brain processes cause consciousness.
Seth’s Beast Machine TheoryEmpirically testable (Inferred, as the theory relies on concepts within the neurobiological and computational fields which emphasize development, testing, and comparison of theories) .
Tests so far
Searle’s Biological NaturalismThe theory is generally supported by empirical evidence from neuroscience showing the link between consciousness and brain activity (e.g., brain impairment, brain stimulation).
Seth’s Beast Machine TheoryTests involving predictive processing accounts of brain perception, cognition, and action (Justified: Specific named tests are not provided, but the theory is explicitly positioned within the predictive processing framework) .
Criticisms
Searle’s Biological NaturalismCritics dispute the claim that the causal connection between brain states and consciousness is fully established. Tension exists in maintaining materialism while arguing consciousness is ontologically subjective and irreducible to objective physical processes.
Seth’s Beast Machine TheoryNot explicitly detailed in the source, but generally subject to the tension inherent in deflationary accounts of consciousness .
Sources
Key sources
Searle’s Biological Naturalism
- The Rediscovery of Mind (1992)
- Biological naturalism (2007)
- What things are conscious? (2007)
Seth’s Beast Machine Theory
- Being You: A New Science of Consciousness, Anil Seth (2021)
- Theories of consciousness, Anil Seth and Tim Bayne (2022)
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