David Rosenthal

What is the relation between mind and physical reality? Well‐established schools of thought give starkly opposing answers to this question. Descartes insisted that mental phenomena are non‐physical in nature. This view seems inviting because mental phenomena are indisputably different from everything else. Moreover, it's safe to assume that all phenomena that aren't mental have some physical nature. So it may seem that the best way to explain how the mental differs from everything else is to hypothesize that mind is non‐physical in nature.

Is mental imagery pictorial? In Pylyshyn's view no empirical data provides convincing support to the “pictorial” hypothesis of mental imagery. Phenomenology, Pylyshyn says, is deeply deceiving and offers no explanation of why and how mental imagery occurs. We suggest that Pylyshyn mistakes phenomenology for what it never pretended to be. Phenomenological evidence, if properly considered, shows that mental imagery may indeed be pictorial, though not in the way that mimics visual perception. Moreover, Pylyshyn claims that the “pictorial hypothesis” is flawed because the interpretation of “picture-like” objects in mental imagery takes a homunculus. However, the same point can be objected to Pylyshyn's own conclusion: if imagistic reasoning involves the same mechanisms and the same forms of representation as those that are involved in general reasoning, if they operate on symbol-based representations of the kind recommended by Pylyshyn (1984) and Fodor (1975), don't we need a phenomenological homunculus to tell an imagined bear from the real one?

Birch et. al. see their model as incompatible with higher-order-thought (HOT) theories of consciousness, on which a state is conscious if one is in some suitable way aware of that state. They see higher-order (HO) awareness as an “extra ingredient”. But since Birch et al go on to say that “[t]his is not the place for a detailed discussion of HOT theories,” they don’t address why they take HO awareness to be an extra ingredient or why HOT theorists are convinced that it’s needed. In this commentary we argue that higher-order theories are a crucial for understanding consciousness.

There is strong reason to doubt that the intuitions Chalmers' meta-problem focuses on are widespread or independent of proto-theoretical prompting. So it's unlikely that they result from factors connected to the nature of consciousness. In any case, it's only the accuracy of the problem intuitions that matters for evaluating theories of consciousness or revealing the nature of consciousness, not an explanation of how they arise. Unless we determine that they're accurate about consciousness, we mustn't assume that realism about consciousness incorporates them, or that denying them means denying that consciousness exists. And we must assess whether they're accurate independently of how they arise.

Dintre fenomenele mentale, nici unul nu pare să reziste atât de bine explicaţiei precum conştiinţa. Parţial, dificultatea se datorează faptului că folosim termenul „conştient” şi alţii înrudiţi să dea seama de anumite fenomene distincte ale căror legături nu sunt întotdeauna clare. Iar acest lucru duce adesea la amestecarea acestor fenomene distincte. De aceea, orice încercare de a explica conştiinţa trebuie să înceapă prin a distinge diferitele lucruri pe care le numim conştiinţă. Un astfel de fenomen este strâns legat de simplul fapt de a fi în stare de veghe. Noi descriem oamenii şi alte fiinţe ca fiind conştienţi atunci când sunt în stare de veghe şi sistemele lor senzoriale sunt receptive într-un mod normal pentru o stare de veghe. Numesc acest fenomen conştiinţă a fiinţei. În acest sens, conştiinţa este o chestiune biologică, constând în aceea că o fiinţă nu este inconştientă – adică, aproximativ starea opusă somnului sau KO-ului. Însă noi folosim termenul „conştiinţă” şi pentru alte fenomene care par mult mai greu accesibile înţelegerii şi explicaţiei. Astfel, distingem nu numai între fiinţe conştiente şi inconştiente, ci şi între stări mentale ce sunt conştiente şi cele ce nu sunt. Voi numi această a doua proprietate conştiinţă de stare. Este bine cunoscut faptul că nu toate stările mentale sunt conştiente. Stări intenţionale precum credinţele şi dorinţele apar în mod vădit fără a fi conştienţi.1 Şi, în ciuda unor diferenţe de opinie asupra chestiunii, voi argumenta că acelaşi lucru este adevărat şi în privinţa stărilor senzoriale precum durerile şi senzaţiile de culoare. Asemenea stări nu numai că pot apărea în mod inconştient, dar adesea o şi fac.2 Deşi conştiinţa fiinţei şi conştiinţa de stare sunt proprietăţi distincte, este foarte posibil să fie legate în diferite moduri. Poate că, de exemplu, fiinţele trebuie ele însele să fie conştiente pentru ca oricare stare mentală a lor să fie conştientă, deşi dacă visurile obişnuite sunt vreodată stări conştiente, ele constituie contraexemple ale acestei generalizări.3 Oricum ar sta lucrurile în această privinţă, proprietatea conştiinţei fiinţei este relativ neproblematică. Putem constata aceasta luând în considerare fiinţe mai puţin înzestrate mental decât noi ale căror stări mentale nu sunt niciodată conştiente, nici măcar atunci când sunt în stare de veghe.4 Toate stările lor mentale sunt asemănătoare stărilor mentale inconştiente în care ne aflăm atunci când suntem trezi..

Quality-space theory (QST) explains the nature of the mental qualities distinctive of perceptual states by appeal to their role in perceiving. QST is typically described in terms of the mental qualities that pertain to color. Here we apply QST to the olfactory modalities. Olfaction is in various respects more complex than vision, and so provides a useful test case for QST. To determine whether QST can deal with the challenges olfaction presents, we show how a quality space (QS) could be constructed relying on olfactory perceptible properties and the olfactory mental qualities then defined by appeal to that QS of olfactory perceptible properties. We also consider how to delimit the olfactory QS from other modalities. We further apply QST to the role that experience plays in refining our olfactory discriminative abilities and the occurrence of olfactory mental qualities in non-conscious olfactory states. QST is shown to be fully applicable to and useful for understanding the complex domain of olfaction.

A striking difference between those fields we classify as humanities and those we regard as sciences is the attitude within each field toward its history. Learning about literature, music, or the visual arts requires becoming knowledgeable about a significant amount of the history of those areas. And education in these fields, at whatever level, invariably involves some study of great accomplishments in the past. By contrast, scientific work and standard scientific textbooks make little reference to the history of the science in question, and such reference is typically relegated to the appreciative mention in passing of important empirical discoveries or theoretical innovations. And professional training in the sciences, both graduate and undergraduate, involves no serious examination of the achievements or methodology of past scientific work, no matter how impressive and influential those achievements may have been. Progress dominates thinking in the sciences, and that emphasis may seem to explain such casual and occasionally condescending reference to the history of the sciences. But progress occurs in the humanities as well; even if some of the greatest artistic accomplishments are well in the past, there is remarkable innovation in style, technique, and methodology in the various arts. Some of the most monumental accomplishments in the sciences, moreover, are historical; nobody is likely to surpass the quality and importance of Newton's achievements, and few will ever equal those of Einstein. So it is unlikely that attitudes towards progress or past accomplishments can explain the divergent attitudes that fields in the sciences and humanities exhibit towards their own history. We can better understand this contrast by appeal to a characteristic feature of the arts. Nobody today writes in the manner of Milton, Racine, or Shakespeare, or composes in the manner of Bach or Beethoven, or paints in the style of Vermeer, Renoir, or Da Vinci. Even Picasso's early, somewhat ostentatious paintings in the styles of various past masters were more to show his prodigious abilities than they were original artistic endeavors..

Consciousness and Mind presents David Rosenthal's influential work on the nature of consciousness. Central to that work is Rosenthal's higher-order-thought theory of consciousness, according to which a sensation, thought, or other mental state is conscious if one has a higher-order thought that one is in that state. The first four essays develop various aspects of that theory. The next three essays present Rosenthal's homomorphism theory of mental qualities and qualitative consciousness, and show how that theory fits with and helps sustain the HOT theory. A crucial feature of homomorphism theory is that it individuates and taxonomizes mental qualities independently of the way we're conscious of them, and indeed independently of our being conscious of them at all. So the theory accommodates the qualitative character not only of conscious sensations and perceptions, but also of those which fall outside our stream of consciousness. Rosenthal argues that, because this account of mental qualities makes no appeal to consciousness, it enables us to dispel such traditional quandaries as the alleged conceivability of undetectable quality inversion, and to disarm various apparent obstacles to explaining qualitative consciousness and understanding its nature. Six further essays build on the HOT theory to explain various important features of consciousness, among them the complex connections that hold in humans between consciousness and speech, the self-interpretative aspect of consciousness, and the compelling sense we have that consciousness is unified. Two of the essays, one an extended treatment of homomorphism theory, appear here for the first time. There is also a substantive introduction, which draws out the connections between the essays and highlights their implications.

Edited in hypertext by Andrew Chrucky. Reprinted with the permission of Professor David Rosenthal. Editor's Note: Due to the limitation of current hypertext, the following conventions have been used. In general, if an expression has some mark over it, that mark is placed as a prefix to the expression. All Greek characters are rendered by their names. Subscripts are placed in parentheses as concatenated suffixes: thus, e.g., HO is the chemical formula for water. Sellars' dot quotes are expressed by bold periods