Source
- Chalmers (1995), “Facing Up to the Problem of Consciousness”, Journal of Consciousness Studies 2(3), 200–219, LIT-406, read in full in NOTE-336 from the author’s copy (sections reliable, pages the copy’s).
- Nagel (1974), “What Is It Like to Be a Bat?”, LIT-096, read in full in NOTE-089 from a transcription of the Mortal Questions reprint, located by footnote.
What was actually shown
The criterion (Nagel). “An organism has conscious mental states if and only if there is something that it is like to be that organism.” That subjective character belongs to a type of point of view, not to an individual. Functional, intentional and causal-role analyses are each compatible with its absence, so none can be what it consists in (NOTE-089, C1–C2). Reduction elsewhere succeeds by leaving a point of view for a more objective description of the same thing, as with sound or lightning. For experience that move leads away from the phenomenon (C4).
Easy and hard (Chalmers §§2–3). The easy problems are explaining discrimination, integration, report, access to one’s own states, attention, deliberate control and the sleep–wake difference. Their phenomena are functionally definable, so a mechanism that performs the function explains them: “you have explained the verbal report function but not reportability” is a conceptual mistake. “You have explained discrimination, integration and report but not how it is experienced” is not. The gene, life and learning have no such further question.
No extra ingredient helps (§5). Chaos, nonalgorithmic processing, new neurophysiology and quantum mechanics are all more structure and dynamics, and “from dynamics, one only gets more dynamics”. Vitalism is disanalogous: the vitalist doubted that mechanisms could perform life’s functions; here no function is in doubt.
Case studies (§4). Crick and Koch’s 35–75 Hz binding and Baars’s global workspace would explain binding and accessibility. They leave “why should global accessibility give rise to conscious experience?” open. Edelman, Dennett and Jackendoff get the same verdict in a sentence each.
What could have come out otherwise. The test could have found some other phenomenon, besides experience, for which “the function but not the phenomenon” is not a conceptual mistake; Chalmers calls the hard problem “almost unique” and names none. Or a mechanism could have been offered whose explanation of the functions left those pressing the question with nothing further to ask. The paper reports neither.
What this does not say
- That the gap is proved. The step from “conceptually coherent that the process occurs without experience” to “experience is not entailed by the physical” is stated in §5 and deferred to The Conscious Mind (LIT-441, unread), including the reply to a posteriori necessity, which appears here as a parenthetical “technical note” (NOTE-336, C4).
- That physicalism is false. Nagel’s conclusion is that it is not refuted, only “not yet understandable”, like “matter is energy” to a pre-Socratic (NOTE-089, C5). Chalmers goes further, to “naturalistic dualism”: experience as fundamental, linked to the physical by psychophysical laws, with physics causally closed (§6). The gap does not by itself decide between them.
- The positive programme. Structural coherence (the structure of experience mirrors the structure of awareness), organisational invariance (THEORY-507) and the double-aspect theory of information, which its author calls “more of an idea than a theory”, are built on the gap and stand or fall separately. On structural coherence, a global-workspace theory is a theory of the mechanism of awareness, and so of a correlate of experience.
- That neuroscience of consciousness is idle. On this account it isolates correlates and explains the structure of experience; what it cannot do is explain why there is experience at all.
- That the vitalism disanalogy is settled. Dennett’s reply (LIT-397) holds that the analogy holds where it matters: in both cases the residue is defined as whatever survives the explanation of every function. Neither paper offers evidence that would decide between them (LIT-397, Standing).
Connections
- Rival. Illusionism (THEORY-633) denies the explanandum: what survives the explanation of the functions is a conviction, produced by introspective representation, that something is left. The two cannot both be right about whether the further question has an answer to find. Chalmers’s later meta-problem paper (LIT-425, THEORY-577) asks both sides to explain that conviction, and argues that only strong illusionism dissolves the hard problem.
- THEORY-023 takes this gap as the background reason behavioural evidence underdetermines experience in AI. Block’s “Harder Problem” (LIT-639), which is a source there, is the epistemic sequel: for a superficial functional duplicate on another physical basis we lack even a conception of the evidence.
- THEORY-091 (deficits cannot show a capacity is phenomenal consciousness’s function) and THEORY-094 (report and no-report paradigms do not isolate experience) are the methodological form of the access–experience distinction this paper calls awareness and experience.
- IIT’s identification of experience with integrated information sits oddly beside §2, which lists “the integration of information” among the easy problems. On this account Φ is either a measure of an easy-problem function or a proposed psychophysical law (NOTE-336, Connections; the pairing is the reader’s).