Neuroscience Theory of Consciousness (NTC): A Structural and Constitutional Solution to the Hard Problem of Consciousness

Abstract

Neuroscience Theory of Consciousness (NTC): A Structural Solution to the Hard Problem of ConsciousnessThe Hard Problem of Consciousness asks why physical or neural processes are accompanied by subjective experience at all — why there is something it is like to be a brain, rather than all biological information processing occurring in the dark, without felt quality. No existing theory has resolved this problem structurally. The Neuroscience Theory of Consciousness (NTC) proposes that the Hard Problem has persisted not because it is permanently unsolvable, but because it has been poorly structured: prior frameworks collapsed the question of whether experience exists, what it is like, and whether it is accessible into a single explanatory target, and then failed to explain any of them satisfactorily. NTC resolves this by formally separating them.NTC's structural solution has four layers. The first addresses the hardest part of the Hard Problem — the existence of experience — through a framework-convergence position: the Intrinsic Experiential Aspect (IEA) is affirmed in biological neural systems not by selecting any single metaphysical account, but because its presence follows as a necessary consequence across every major tradition that addresses consciousness — idealism, panpsychism, dual-aspect monism, Advaita Vedanta, and neuroscience alike. No researcher within any of these traditions need abandon their framework to affirm IEA in biological systems. The convergence itself is the structural answer to the existence question: N_bio ⇒ IEA ≠ 0, affirmed across frameworks. The explanatory question — which account best explains why this holds — is designated as an open research question inviting investigation from every tradition.The second layer converts what was formerly the Hard Problem's most intractable aspect — qualitative character — into a directly testable empirical hypothesis. Neural organization Γ(t) is hypothesized to constrain, structure, and predict the phenomenal expression of the already-affirmed IEA: Γ(t) → Q(t) = f[Γ(t)]. This is not a claim about the existence of experience; it is a claim about its shape, richness, and qualitative character — and it is falsifiable by neural decoding, perturbational manipulation, and representational similarity analysis.The third layer addresses conscious access — the aspect that most prior theories have conflated with existence — through a formally independent accessibility criterion: Acc(s(t)) = 1 ⟺ I_NTC(s(t)) ≥ θ_A. States below this threshold are states of inaccessible or minimal expression, not states in which IEA has ceased. This is the structural basis for NTC's account of sleep, anesthesia, and unconsciousness: these are access transitions, not existence transitions.The fourth layer — the Phenomenal Field (NTC-PNF) — characterizes how multiple phenomenal contents are organized within a single conscious episode. The Phenomenal Non-Separability Principle holds that phenomenal differentiation within a common phenomenal field does not, by itself, establish separate phenomenal fields. Self, body, world, thought, sensation, and emotion may all be phenomenally distinct while remaining co-organized within a single phenomenal field — a structural distinction with direct implications for theories of self, perception, and the subject-object relation.Taken together, these four layers constitute a structural solution: the Hard Problem is not dissolved or deflected, but decomposed into four precisely defined and independently addressable questions. The existence question is answered by framework convergence. The expression question is answered empirically. The access question is answered formally. The organization question is answered structurally through the phenomenal-field framework. NTC is compared with Global Neuronal Workspace Theory, Integrated Information Theory, and Biological Naturalism, and is positioned as the first framework to address existence, expression, access, and phenomenal-field organization as formally independent but integrated levels of a single theory.