Neurophenomenal Structuralism

The question demands a causal generative mechanism for WHY phenomenal experience arises in physical systems. NPS as formulated does the opposite: Lyre's program "deliberately does NOT solve the hard problem; it brackets it," targeting only the structure/content of experience (why this red relates to that orange) via a homomorphic mapping, while staying agnostic about what makes a state conscious at all. Fink's "direct" variant explicitly "delivers explanations but does not close the explanatory gap" — its author concedes the gap remains open. The core move is structural CORRESPONDENCE (a homomorphism between neural and phenomenal structure, a shared "common currency"), which is a mapping/redescription, not a derivation of phenomenality from physics. Even Northoff's bolder TTC, the only piece that reaches for qualia, is framed as "bridging" rather than "deductively generating phenomenality from physics," so the generative "why is there something it is like" is addressed "only by structural correspondence, not full derivation."

Key evidence: The theory's own characterization states NPS "deliberately does NOT solve the hard problem; it brackets it," and Fink concedes his variant "delivers explanations but does not close the explanatory gap" (Fink 2024; Lyre 2022).

The question demands an explanation of WHY the experiencer and the agent are the same entity, distinguishing 'I' from 'my body'. NPS proper (Lyre/Fink) treats the self only as a bare placeholder — experiences are relational properties "of sentient subjects" with no developed account of selfhood, let alone of the experiencer-agent identity. The imported Northoff/TTC machinery offers a nested hierarchical self (interoceptive, extero-proprioceptive, mental) anchored to brain spatial nestedness, but this locates and structures the self (a where/what story) without theorizing agency at all; by the theory's own statement "the coincidence of experiencer and initiator of action is not directly theorized" and is at most "implied" by embodiment. An implication via interoceptive embodiment is not a mechanistic account of the unity of experiencer and agent, and the framework has "near-total silence on agency/free will." Under the strict, hard-problem-honest standard, an implied/promissory gesture fails the bar.

Key evidence: The theory's own characterization: "The coincidence of experiencer and initiator of action is not directly theorized... neither NPS proper nor Northoff offers an explicit account tying the subject to agency," plus the noted "near-total silence on agency/free will."

The yes-bar requires that consciousness exert genuine, non-epiphenomenal causal influence, with causation distinguished from mere correlation. NPS commits to the exact opposite: Lyre's formulation is explicitly epiphenomenalist, stating "all causal work is taken over by the N-structure" and that Q-structures have "no causal role at all," grounded in Kim's exclusion argument under physical causal closure and Q-on-N supervenience. The allied Spatiotemporal Neuroscience strand likewise locates all causal efficacy in neural temporo-spatial dynamics, explicitly disclaiming any "extra downward force" from phenomenal properties qua phenomenal. A theory that affirmatively denies phenomenal experience does any causal work does not merely fail to answer the causation question — it answers it in the negation the yes-bar treats as an automatic NO.

Key evidence: Lyre (2022) NPS explicitly holds Q-structures have "no causal role at all" and "all causal work is taken over by the N-structure," invoking Kim's exclusion argument under physical causal closure.

NPS as actually formulated by its proponents (Lyre 2022, Fink 2024) deliberately brackets the level/state distinction — it addresses only the structure of content within already-conscious states and is explicitly silent on when or how strongly a state is conscious. Any answer to the State question must be imported from Northoff's TTC, a distinct framework that the seed conflates with NPS. Even granting that import, TTC's account ("temporo-spatial nestedness" of spontaneous activity tracks wakefulness/sleep/anesthesia) is, by the theory's own listed limitations, correlational and at risk of being "a redescription rather than an explanation" — it identifies a graded internal property that co-varies with level but does not supply a genuine intrinsic control mechanism for how the system moves between levels. Under the strict, hard-problem-honest standard, correlating a state with degree of nestedness without an explanatory internal control mechanism falls short of the yes-bar, and the actual theory under judgment is silent.

Key evidence: "Lyre/Fink's NPS proper deliberately avoids the conscious/unconscious (level) distinction... This is a major silence. The gap is filled by Northoff's TTC" — i.e., NPS itself does not answer, and the substitute (TTC nestedness) is conceded to be correlational and possibly redescriptive.

NPS proper is, by its own proponents' admission, restricted to perceptual phenomenology (color, sound, pitch similarity relations) and is silent on reasoning, memory, executive function, or any cognitive/psychological function. The only functional content comes from importing Northoff's separate TTC/Spatiotemporal Neuroscience framework, which offers "temporo-spatial globalization" as broadcasting/global access. But that is a generic access/integration claim about WHEN cognition becomes conscious, not a positive specification of WHICH functions consciousness enables. Indeed TTC recasts predictive coding, episodic memory, and mind-wandering as already embedded within spatiotemporal dynamics rather than as functions specifically enabled by consciousness, which collapses the distinction the question asks for. There is no commitment naming determinate cognitive operations (e.g. arithmetic, inference, mental rotation) that consciousness makes possible.

Key evidence: The theory description states NPS proper "does not extend to reasoning, memory, or executive functions" and that cognition/function is supplied only by importing the distinct TTC framework, whose contribution is "global access/integration via globalization" — a generic access claim, not a specific functional inventory.

NPS does have a genuine account of one half of the question: diversity of content is explained by the richness of the relational Q-structure homomorphically mapped onto self-organized neural difference-coding maps, with phenomenal holism individuating each experience by its place in the whole web — and in the imported TTC, the "spatiotemporal repertoire" supplies the range of possible contents. This is a real, theory-specific mechanism for diversity, and arguably touches semantic integration via holistic relational structure. However, the yes-bar explicitly demands the role of attention/intentionality in determining WHAT enters consciousness, citing binocular rivalry switching as the test case, and on this the theory is silent: by its own description "attention is not a developed focus in NPS proper," and it offloads selection to "alignment" and the "multi-scale repertoire," which describe what is representable rather than mechanistically explaining why one rivaling percept is selected over another at a given moment. Telling which structure is available is not explaining the selection/switching dynamics the question requires, and under the strict standard a redescription ("alignment does the work attention would do") is not a mechanistic account of intentional selection. Because a YES requires meeting the full yes-bar and a load-bearing component (attention-driven entry/rivalry) is conceded absent, the verdict is NO.

Key evidence: The theory's own statement that "Attention is not a developed focus in NPS proper; alignment and the multi-scale repertoire do the work that selection/attention would otherwise do" — directly failing the yes-bar's explicit requirement to explain attention/intentionality and binocular-rivalry switching.

Under the strict "as actually formulated" standard, NPS does not provide a substrate-independent formulation that its proponents extend to artifacts. Lyre's NPS grounds phenomenal structure in "self-organized neural maps" and biological difference/change-detection coding, offering no account of artificial substrates; Northoff's allied Spatiotemporal Neuroscience is more explicitly substrate-bound, stressing embodiment, interoceptive/visceral anchoring, and biologically specific architecture (thalamus, insula, cortical hierarchy). Although the homomorphism/structuralist framing is in principle multiply realizable and a structuralist could extend it to any system instantiating the right Q-homomorphic structure, the authors do not make this move — making a YES a promissory note rather than a stated commitment. The yes-bar requires an existing substrate-independent formulation applicable to artifacts; what the theory actually offers is silence or implicit substrate-dependence.

Key evidence: The theory's own characterization states both strands are "essentially silent or implicitly substrate-bound, and neither endorses strong substrate-independence," with Lyre's NPS "tightly tied to 'self-organized neural maps'" offering "no account of artificial substrates" and Northoff's program "more explicitly substrate-dependent."