In Connectionism and the Philosophy of Psychology, Horgan and Tienson articulate and defend a new view of cognition.

"A third of the papers in this volume originated at the 1987 Spindel Conference ... at Memphis State University"--Pref.

In the first post World War II identity theories (e.g., Place 1956, Smart 1962), mind brain identities were held to be contingent. However, in work beginning in the late 1960's, Saul Kripke (1971, 1980) convinced the philosophical community that true identity statements involving names and natural kind terms are necessarily true and furthermore, that many such necessary identities can only be known a posteriori. Kripke also offered an explanation of the a posteriori nature of ordinary theoretical identities such as that (...) water = H2O. We identify the kinds and substances involved in theoretical identities by certain of their contingent properties. What we discover when we discover a theoretical identity is the underlying nature of the kind that we identify by those contingent properties. Now, of course, it was being a posteriori, not being contingent, that mattered to the identity theorists anyway, so the necessity of identity is not, in itself, damaging to mind brain identity theories. However, Kripke also argued persuasively that the alleged mind brain identities could not be treated in the same way as ordinary theoretical identities. We "identify" pain by feeling it, and surely how it feels is an essential property of pain, not a contingent property. Thus, a mind body identity theory must provide a different explanation of why its identities are a posteriori. A new wave of materialists has appeared on the scene with a new strategy for explaining [1] the a posteriori nature of its alleged identities. The strategy is to locate the explanation for the a posteriori nature of mind body identities, not on the side of the world, but on the side of the mind -in different ways of thinking about or imagining, or in different concepts. Thus, on this new view, there is only one property—this brain process type, which is identical with this pain.. (shrink)

David Marr provided a useful framework for theorizing about cognition within classical, AI-style cognitive science, in terms of three levels of description: the levels of (i) cognitive function, (ii) algorithm and (iii) physical implementation. We generalize this framework: (i) cognitive state transitions, (ii) mathematical/functional design and (iii) physical implementation or realization. Specifying the middle, design level to be the theory of dynamical systems yields a nonclassical, alternative framework that suits (but is not committed to) connectionism. We consider how a brain's (...) (or a network's) being a dynamical system might be the key both to its realizing various essential features of cognition — productivity, systematicity, structure-sensitive processing, syntax — and also to a non-classical solution of (frame-type) problems plaguing classical cognitive science. (shrink)

For the last 20 years or so, philosophers of mind have been using the term ‘qualia’, which is frequently glossed as standing for the “what-it-is-like” of experience. The examples of what-it-is-like that are typically given are feelings of pain or itches, and color and sound sensations. This suggests an identification of the experiential what-it-islike with such states. More recently, philosophers have begun speaking of the “phenomenology“ of experience, which they have also glossed as “what-it-is-like”. Many say, for example, that any (...) acceptable materialism—or any acceptable account of the relation of mind and body—must “respect the phenomenology.”1 Typically, no examples beyond those mentioned in the first paragraph are offered. This suggests that the picture of the phenomenology that ”must be respected” is the what-it-is-like of bodily sensations, of sensations that occur in perception, and perhaps of certain analogous nonperceptual states, such as imaginings and image-like rememberings. According to the suggested picture, all there is to phenomenology is such states; intentional mental states—as such— have no phenomenology; there is nothing that it is like to undergo them. Although beliefs and desires are intentionally directed—i.e., they have aboutness—these mental states allegedly are not inherently phenomenal. On this view, there is nothing that it is like to be.. (shrink)

Human cognition is rich, varied, and complex. In this Chapter we argue that because of the richness of human cognition (and human mental life generally), there must be a syntax of cognitive states, but because of this very richness, cognitive processes cannot be describable by exceptionless rules. The argument for syntax, in Section 1, has to do with being able to get around in any number of possible environments in a complex world. Since nature did not know where in the (...) world humans would find themselves—nor within pretty broad limits what the world would be like —nature had to provide them with a means of “representing” a great deal of information about any of indefinitely many locations. We see no way that this could be done except by way of syntax— that is, by a systematic way of producing new, appropriate representations as needed. We discuss what being systematic must amount to, and what, in consequence, syntax should mean. We hold that syntax does not require a part/whole relationship. The argument for the claim that human cognitive processes cannot be described by exceptionless rules, in Section 2, appeals to the fact that there is no limit to the factors one might.. (shrink)

In On the Content and Object of Presentations, Kasimir Twardowski presents an interesting line of thought concerning the content of a presentation and its relation to the object of that presentation. This way of thinking about content is valuable for understanding phenomenal intentionality, and it should also be important for the project of “naturalizing” the mental (or at least for discovering the neural correlates of the phenomenal). According to this view, content is that by virtue of which a presentation of (...) an object presents a certain object and no other. In the cases in which an object is presented as simple, there is nothing more that can be said about the relation of content and object. It is sui generis: the relation of content to an object by virtue of which it presents that object. Further, the content of a presentation is never itself directly presented. The content can only be gotten at indirectly, as the content by which such and such object is presented. Where the presented object is complex—as is of course the normal case—a lot that is useful can be said about the structure of the content. In this paper, I lay out Twardowski's theory of the content of presentations. Since the business of content is to present its object, I briefly present the basics of Twardowski's mereology of objects. (shrink)

David Marr provided an influential account of levels of description in classical cognitive science. In this paper we contrast Marr'ent with some alternatives that are suggested by the recent emergence of connectionism. Marr's account is interesting and important both because of the levels of description it distinguishes, and because of the way his presentation reflects some of the most basic, foundational, assumptions of classical AI-style cognitive science . Thus, by focusing on levels of description, one can sharpen foundational differences between (...) classicism and potential non-classical conceptions of mentality that might emerge under the rubric of connectionism. (shrink)

Connectionism was explicitly put forward as an alternative to classical cognitive science. The questions arise: how exactly does connectionism differ from classical cognitive science, and how is it potentially better? The classical “rules and representations” conception of cognition is that cognitive transitions are determined by exceptionless rules that apply to the syntactic structure of symbols. Many philosophers have seen connectionism as a basis for denying structured symbols. We, on the other hand, argue that cognition is too rich and flexible to (...) be simulable by the exceptionless representation-level rules that classicism requires. However, this very richness of cognition requires syntactically structured representations—what philosophers call a language of thought. The natural mathematical characterization of neural networks comes from the theory of dynamical systems. We propose that the mathematics of dynamical systems, not the mathematics of algorithms, holds the key to how cognitive structure and cognitive processes can be realized in the physical structure and processes of a network. (shrink)

Contemporary cognitive science has two principal branches: the classical computational approach (sometimes called classicism) and connectionism. Rules are fundamental to theorizing about the basic units of processing in both classicism and connectionism. But we will be concerned primarily with rules that apply to representations and that determine transitions from one cognitive/representational state to the next. Such rules are fundamental to classicism, since, according to classicism, cognitive processes simply are rule‐governed cognitive state transitions. Rules that apply to representations are not a (...) built‐in feature of connectionist architecture, so the role of such rules in connectionism is less clear. We will argue that they are neither necessary nor (in general) desirable in connectionism. We discuss the status of rules first in classicism, then in connectionism. (shrink)

What van Gelder calls the dynamical hypothesis is only a special case of what we here dub the general dynamical hypothesis. His terminology makes it easy to overlook important alternative dynamical approaches in cognitive science. Connectionist models typically conform to the general dynamical hypothesis, but not to van Gelder's.

Common names, for Mill, have both connotation and denotation. Thus ‘horse’ connotes certain properties, and the name ‘horse’ denotes the things that have those properties. By contrast, proper names have no connotations; they do not denote in virtue of the possession of certain properties by their denotations, but so to speak, directly. Thus Socrates received his name by being dubbed ‘Socrates’; and he might just as well have been given any other name. This contrast is misleading. After all, we might (...) have named horses by another name, too; e.g., ‘cow’ or ‘Pferd’. However, once the convention by which they are called ‘horses’ is established, it is not correct to call them ‘cows’. A horse is not a cow. Just so Socrates could have been named ‘Plato’ or ‘Moses’, but once he has been named ‘Socrates’, it is just as wrong to call him ‘Plato’ as it is to call a horse a ‘cow’. What is correctly called a ‘horse’ is so called in virtue of its possession of certain properties, just as what is called ‘Socrates’ is so called in virtue of his possession of the requisite properties. From this point of view, proper names are words like any others. (Leonard Linsky, Oblique Contexts, University of Chicago Press 1983, pp. 16f.). (shrink)

Common names, for Mill, have both connotation and denotation. Thus ‘horse’ connotes certain properties, and the name ‘horse’ denotes the things that have those properties. By contrast, proper names have no connotations; they do not denote in virtue of the possession of certain properties by their denotations, but so to speak, directly. Thus Socrates received his name by being dubbed ‘Socrates’; and he might just as well have been given any other name. This contrast is misleading. After all, we might (...) have named horses by another name, too; e.g., ‘cow’ or ‘Pferd’. However, once the convention by which they are called ‘horses’ is established, it is not correct to call them ‘cows’. A horse is not a cow. Just so Socrates could have been named ‘Plato’ or ‘Moses’, but once he has been named ‘Socrates’, it is just as wrong to call him ‘Plato’ as it is to call a horse a ‘cow’. What is correctly called a ‘horse’ is so called in virtue of its possession of certain properties, just as what is called ‘Socrates’ is so called in virtue of his possession of the requisite properties. From this point of view, proper names are words like any others. (Leonard Linsky, Oblique Contexts, University of Chicago Press 1983, pp. 16f.). (shrink)

We have a familiar idea of levels of description or levels of theory in science: microphysics, atomic physics, chemistry, biology, psychology, and the various social sciences. It is clear that philosophers - such as Terry Horgan - who want to be nonreductive materialists with regard to the mental must hold that this is not mere description; there must be genuine higher-level causes, and hence, genuine higher-level properties, in particular mental properties and causes. But there appears to be a deep problem (...) concerning mental causes. The (micro-) physical world is causally closed. Mental states are - or depend on or are realized by - physical states. It seems, then, that the physical state on which a mental state depends will be responsible for any alleged effects of the mental state. There will be no room for mental causation. And if properties exist insofar at they have a causal role, there will be no room for mental properties either. Many philosophers - Horgan included - have seen this problem of the "causalexclusion" ofthe mental as a specialcase of a general problem:the exclusion of higher-level causes by the causal closure of microphysics. Suppose one higher-level state, H1 leads to another higher-level state, H2. H1 is realized by some base level state, B1, which leads to a base-level state, B2, which in turn realizes H2. All of the casual work, so to speak, takes place at the base level. There is no room for any genuine causal connection between H1, as such, and H2, as such. I argue that there is no problem about higher-order causation in general. There are genuine, unsurprising higher-level causes and properties. A ball roles, for example, or breaks a window. If there is a problem of exclusion regarding putative mental causes, it is not an instance of a general exclusion problem, but is sui generis, and mental causation remains mysterious. (shrink)