Online research in philosophy

The foundational discussion of physicalism in the analytic philosophy of consciousness is Carnap's 1932 paper 'Psychology in physical language'. That paper suggests that reality divides into 'form' and 'content': the content of reality is entirely physical, but consciousness is located in the form of reality. The contemporary debate over whether consciousness is physical overlooks this view, presupposing that reality is exhausted by its content. For example, the physicalist Lewis claims that the content of reality is exhausted by the physical: by (...) Carnap's lights, correctly so; and the antiphysicalist Chalmers claims that reality is not exhausted by its physical content: by Carnap's lights, also correctly so. But by Carnap's lights, both are wrong to presuppose that reality is exhausted by its content. (shrink)

Justin makes a novel case, based on reflection on the “telos” of color vision, for a dispositional theory of colors. Justin’s case is highly suggestive, and comes tantalizingly close to resolving the debate in the metaphysics of color. But I have a few questions which I would like to see answered before I am converted.

Jenann’s central metaphysical thesis is that there is an objective conditional probability function PrG(A/B), the domain of which includes a great many, perhaps all, pairs of contingent propositions. This pair can be synchronic or diachronic: both can concern how things are at the same time, or not. Jenann’s central epistemological thesis is antiskepticism about PrG, in the following sense: prima facie, the subjective credence functions of epistemically reasonable agents converge on PrG: roughly, if you’ve done a lot of science, for (...) all A, B, your C(A/B) is similar to PrG(A/B). (Compare antiskepticism about perceptual knowledge: prima facie, if circumstances are good and one’s visual experience represents that p, p.) These theses have two cool consequences: first, the possibility of a novel approach to objective Bayesianism; second, a way of doing away with dynamical laws. (shrink)

This somewhat odd paper argues against a representational view of visual experience using an intricate "inversion" type thought experiment involving double vision: two subjects could represent external space in the same way while differing phenomenally due to different "spread" in their double images. The spatial structure of the visual field is explained not by representation of external space but functionally, in terms of the possible locations of an attentional spotlight. -/- I'm fond of the ideas in this paper but doubt (...) I'll be returning to it soon. (shrink)

Direct realists think that we can't get a clear view the nature of /hallucinating a white picket fence/: is it /representing a white picket fence/? is it /sensing white-picket-fencily/? is it /being acquainted with a white' picketed' sense-datum/? These are all epistemic possibilities for a single experience; hence they are all metaphysical possibilities for various experiences. Hallucination itself is a disjunctive or "multidisjunctive" category. I rebut MGF Martin's argument from statistical explanation for his "epistemic" conception of hallucination, but his view (...) embeds in my view as a "reference-fixer". (shrink)

A direct realist theory of perceptual justification. I take a ground-up approach, beginning with a theory of subjective rationality understood in terms of first-person rational explicability of the stream of consciousness. I mathematize this picture via a Tractarian spin on a semantical framework developed by Rayo. Perceptual states justify by being 'receptive': rationally inexplicable intentional states encoded in sentences that are analytic. Direct realists working within this framework should say that when one is taken in by hallucination one's overall picture (...) of the world is incoherent; in this sense, a belief based on delusive hallucination can be provided with exculpation but not with justification. (shrink)

Let's be externalists about perceptual consciousness and think the form of veridical perceptual consciousness includes /seeing this or that mind-independent particular and its colors/. Let's also take internalism seriously, granting that spectral inversion and hallucination can be "phenomenally" the same as normal seeing. Then perceptual consciousness and phenomenality are different, and so we need to say how they are related. It's complicated!<br><br>Phenomenal sameness is (against all odds) /reflective indiscriminability/. I build a "displaced perception" account of reflection on which indiscriminability stems (...) from shared "qualia". Qualia are compatible with direct realism: while they generate an explanatory gap (and colors do not), so does /seeing/; qualia are excluded from perceptual consciousness by its "transparency"; instead, qualia are aspects of thought about the perceived environment. <br><br>The asymmetry between my treatments of color and seeing is grounded in the asymmetry between ignorance and error: while inversion shows that normal subjects are ignorant of the natures of the colors, hallucination shows not that perceivers are ignorant of the nature of seeing but that hallucinators are prone to error about their condition. Past literature has treated inversion and hallucination as on a par: externalists see error in both cases, while internalists see mutual ignorance. My account is so complicated because plausible results require mixing it up. (shrink)

In every familiar case, a conscious subject has a perspective on the world. From time to time, various things are brought within this perspective: when one sees a mockingbird, or entertains a thought about Tony Blair, the mockingbird---or Blair---comes within one’s perspective. Upon reflection, it seems that not all entries into a subject’s perspective are on a par: the mockingbird when seen seems to be in some sense more intimately within one’s perspective than is Blair when merely thought about. This (...) suggests---and a number of philosophers have found theoretical utility in supposing--- that there may be a maximally intimate way of being in a subject’s perspective. (shrink)

Jane’s fleeting glimpse of a mockingbird conscious is Jane’s taking a perspective on, or representing, that glimpse; or one might say that the specific feel of that fleeting glimpse can be understood by saying how things are from Jane’s perspective, or how Jane represented things to be (it was to Jane as if a mockingbird flashed by).

This paper expands on the discussion in the first section of 'Beyond phenomenal naivete'. Let Phenomenal Naivete be understood as the doctrine that some phenomenal characters of veridical experiences are factive properties concerning the external world. Here I present in detail a phenomenological case for Phenomenal Naivete and an argument from hallucination against it. I believe that these arguments show the concept of phenomenal character to be defective, overdetermined by its metaphysical and epistemological commitments together with the world. This does (...) not establish a gappish eliminativism, but a gluttish pluralism, on which there are many imperfect deservers of the name 'phenomenal character'. Different projects in the philosophy of mind -- phenomenology, philosophy of conscious, metaphysics and epistemology of perception -- are concerned with different deservers of the name. (shrink)

I argue against such "Relation Intentionalist" theories of consciousness as the higher-order thought and inner sense views on the grounds that they understand a subject's awareness of his or her phenomenal characters to be intentional, like seeming-seeing, rather than "direct", like seeing. The trouble with such views is that they reverse the order of explanation between phenomenal character and intentional awareness. A superior theory of consciousness, based on views expressed by Russell and Price, takes the relation of awareness to be (...) a nonintentional "acquaintance". (shrink)

I discuss the meaning of 'There's something e is like', in the context of a reply to Eric Lormand's 'The explanatory stopgap'. I argue that Lormand is wrong to think it has a specially perceptual meaning. Rather, it has one of at least four candidate meanings: (a) e is some way as regards its subject; (b) e is some way and e's being that way is in the possession of its subject; (c) e is some way in the awareness of (...) its subject; (d) e's subject is the "experiencer" of e. I provide additional argumentation for the view in this paper that in the context, 'like this' functions as a predicate variable. (shrink)

I interpret the anti-idealist manoeuverings of the second half of Moore's 'The refutation of idealism', material as widely cited for its discussion of 'transparency' and 'diaphanousness' as it is deeply obscure. The centerpiece of these manoeuverings is a phenomenological argument for a relational view of perceptual phenomenal character, on which, roughly, 'that which makes the sensation of blue a mental fact' is a non-intentional relation of conscious awareness, a view close to the opposite of the most characteristic contemporary view going (...) under the transparency rubric. The discussion of transparency and diaphanousness is a sidelight, its principal purpose to shore up the main line of argumentation against criticism; in those passages all Moore argues is that the relation of conscious awareness is not transparent, while acknowledging that it can seem to be. (shrink)

The naive realist takes a veridical visual experience to be an immediate relation to external entities. Is this how such an experience is phenomenally, by its phenomenal character? Only if there can be phenomenal error, since a hallucinatory experience phenomenally matching such a veridical experience would then be phenomenally but not in fact such a relation. Fortunately, such phenomenal error can be avoided: the phenomenal character of a visual experience involves immediate awareness of a sort of picture of external entities, (...) as on a representative theory of perception. The attraction of naive realism results from an erroneous projection of the immediacy of the subject's awareness of this picture onto the external entities pictured. (shrink)

Perception represents colors inexactly. This inexactness results from phenomenally manifest noise, and results in apparent violations of the transitivity of perceptual indiscriminability. Whether these violations are genuine depends on what is meant by 'transitivity of perceptual indiscriminability'.

I argue on linguistic grounds that when Mary comes to know what it's like to see a red thing, she comes to know a certain inexpressible truth about the character of her own experience. This affords a "no concept" reply to the knowledge argument. The reason the Knowledge Argument has proven so intractable may be that we believe that an inexpressible concept and an expressible concept cannot have the same referent.

The representationalist theory of consciousness is the view that consciousness reduces to mental representation. This view comes in several variants which must explain introspective awareness of conscious mental states.