Robert D. Rupert

This essay argues for a mixed-resource approach to scientific modeling and applies it to questions in philosophy of mind. A mixed-resource approach makes use of whatever resources – at whatever scale, from whatever academic discipline – seem useful, freely combining such varied resources in individual models. The success of mixed-resource modeling challenges the widely shared commitment to a personal level in the context of which mental states are to be studied in relative isolation. The adoption of a mixed-resource perspective has the potential to transform treatment of further matters in philosophy of mind, which is illustrated by discussion of psychological Frege cases.

The Best Test Theory of Extension (BTT) offers a solution to the disjunction problem. According to BTT, the extension of a natural kind term t in a given subject S’s language of thought (LOT) consists of the members of the natural kind that has the highest success rate relative to t. We calculate the success rate of natural kind K relative to S’s term t by dividing the number of times members of K have caused S to token any LOT term whatsoever into the number of times members of K have caused S to token t.

This paper was written for and presented at a symposium on Multiple Realizability at the Central Division of the APA in 2022. It's in somewhat rough shape, especially the later parts. I hope to be in a position soon to post a revised and more carefully worked out version. The basic argument of the first half is this: Realization of the interesting sort (and thus MR of the interesting sort) requires tidy separation of levels (with realizers being at a lower level than that which they realize). The success of mixed-scale, mixed-resource (i.e., multi-grain) modeling strongly suggests that such a tidy separation of levels is not in the cards. Thus, MR is (likely) not a widespread phenomenon in our universe. The second half of the paper develops a relation of "multiple explainability" that is meant to play the role, in many contexts, of MR, while being metaphysically and methodologically messier than MR.

In this essay, it is argued that naturalism of an even moderate sort speaks strongly against a certain widely held thesis about the human mental (and cognitive) architecture: that it is divided into two distinct levels, the personal and the subpersonal, about the former of which we gain knowledge in a manner that effectively insulates such knowledge from the results of scientific research. An empirically motivated alternative is proposed, according to which the architecture is, so to speak, flattened from above. On this flattened view, although the states and processes typically associated with the personal level likely appear in our best models of the production of human behavior, they appear alongside states and processes normally associated with the subpersonal level. Moreover, the success of such models depends nowise on a levels-based distinction between the various causal contributors. It is argued that the flattened view has methodological implications of significant import.

These ten lectures articulate a distinctive vision of the structure and workings of the human mind, drawing from research on embodied cognition as well as from historically more entrenched approaches to the study of human thought. On the author’s view, multifarious materials co-contribute to the production of virtually all forms of human behavior, rendering implausible the idea that human action is best explained by processes taking place in an autonomous mental arena – those in the conscious mind or occurring at the so-called personal level. Rather, human behavior issues from a widely varied, though nevertheless integrated, collection of states and mechanisms, the integrated nature of which is determined by a form of clustering in the components’ contributions to the production of intelligent behavior. This package of resources, the cognitive system, is the human self. Among its elements, the cognitive system includes a vast number of representations, many subsets of which share their content. On the author’s view, redundancy of content itself constitutes an important explanatory quantity; the greater the extent of content-redundancy among representations that co-contribute to the production of an instance of behavior, the more fluid the behavior. In the course of developing and applying these views, the author addresses questions about the content of mental representations, extended cognition, the value of knowledge, and group minds.

This essay presents the conditional probability of co-contribution account of the individuation of cognitive systems (CPC) and argues that CPC provides an attractive basis for a theory of the cognitive self. The argument proceeds in a largely indirect way, by emphasizing empirical challenges faced by an approach that relies entirely on predictive processing (PP) mechanisms to ground a theory of the cognitive self. Given the challenges faced by PP-based approaches, we should prefer a theory of the cognitive self of the sort CPC offers, one that accommodates variety in the kinds of mechanism that, when integrated, constitute a cognitive system (and thus the cognitive self), to a theory according to which the cognitive self is composed of essentially one kind of thing, for instance, prediction-error minimization mechanisms. The final section focuses on one of the central functions of the cognitive self: to engage in conscious reasoning. It is argued that the phenomenon of conscious, deliberate reasoning poses an apparently insoluble problem for a PP-based view, one that seems to rest on a structural limitation of predictive-processing models. In a nutshell, conscious reasoning is a single-stream phenomenon, but, in order for PP to apply, two streams of activity must be involved, a prediction stream and an input stream. Thus, with regard to the question of the nature of the self, PP-based views must yield to an alternative approach, regardless of whether proponents of the predictive processing, as a comprehensive theory of cognition, can handle the various empirical challenges canvassed in the preceding section.

A vexing problem in contemporary epistemology – one with origins in Plato’s Meno – concerns the value of knowledge, and in particular, whether and how the value of knowledge exceeds the value of mere (unknown) true opinion. The recent literature is deeply divided on the matter of how best to address the problem. One point, however, remains unquestioned: that if a solution is to be found, it will be at the personal level, the level at which states of subjects or agents, as such, appear. We take exception to this orthodoxy, or at least to its unquestioned status. We argue that subpersonal states play a significant – arguably, primary – role in much epistemically relevant cognition and thus constitute a domain in which we might reasonably expect to locate the “missing source” of epistemic value, beyond the value attached to mere true belief.

This essay explores the connection between theories of the self and theories of self-knowledge, arguing (a) that empirical results strongly support a certain negative thesis about the self, a thesis about what the self isn’t, and (b) that a more promising account of the self makes available unorthodox – but likely apt – ways of characterizing self-knowledge. Regarding (a), I argue that the human self does not appear at a personal level the autonomous (or quasi-autonomous) status of which might provide a natural home for a self that can be investigated reliably from the first-person perspective, independent of the empirical sciences. Regarding (b), I contend that the most promising alternative view of the self is revisionary: the self is to be identified with the cognitive system as a whole, the relatively integrated collection of mechanisms that produces intelligent behavior (Rupert 2009, 2010, 2019). The cognitive system teems with reliable, though not necessarily perfect, indicators (cf. Dretske 1988) of its own properties or of the properties of its proper parts, many of which are available for detection by, or the control of, further processes, such as motor control. I argue that indicating states should be treated as potential vehicles of self-knowledge, regardless of whether they are truth-evaluable states, such as beliefs. The investigation of self and self-knowledge frames discussion of a final topic, of some gravity: the way in which self-knowledge might contribute to self-improvement. In this regard, I emphasize the efficacy of certain forms of alignment between, on the one hand, elements of the cognitive system corresponding to a more commonsense-based conception of the self and, on the other hand, processes associated with what is frequently referred to as ‘implicit’ cognitive processing (Evans and Frankish 2009).

This paper asks about the ways in which embodimentoriented cognitive science contributes to our understanding of phenomenal consciousness. It is first argued that central work in the field of embodied cognitive science does not solve the hard problem of consciousness head on. It is then argued that an embodied turn toward neurophenomenology makes no distinctive headway on the puzzle of consciousness; for neurophenomenology either concedes dualism in the face of the hard problem or represents only a slight methodological variation on extant cognitive-scientific approaches to the easy problems of consciousness. The paper closes with the positive suggestion that embodied cognitive science supports a different approach to phenomenal consciousness, according to which the mind is massively representational, cognitive science has no use for the personal-level posits that tend to drive philosophical theorizing about consciousness and mind, and the hard problem is illusory.

A theory of cognitive systems individuation is presented and defended. The approach has some affinity with Leonard Talmy's Overlapping Systems Model of Cognitive Organization, and the paper's first section explores aspects of Talmy's view that are shared by the view developed herein. According to the view on offer -- the conditional probability of co-contribution account (CPC) -- a cognitive system is a collection of mechanisms that contribute, in overlapping subsets, to a wide variety of forms of intelligent behavior. Central to this approach is the idea of an integrated system. A formal characterization of integration is laid out in the form of a conditional-probabilitybased measure of the clustering of causal contributors to the production of intelligent behavior. I relate the view to the debate over extended and embodied cognition and respond to objections that have been raised in print by Andy Clark, Colin Klein, and Felipe de Brigard.

The claim is frequently made that structured collections of individuals who are themselves subjects of mental and cognitive states – such collections as courts, countries, and corporations – can be, and often are, subjects of mental or cognitive states. And, to be clear, advocates for this so-called group-minds hypothesis intend their view to be interpreted literally, not metaphorically. The existing critical literature casts substantial doubt on this view, at least on the assumption that groups are claimed to instantiate the same species of mental and cognitive properties as individual humans. In this essay, I evaluate a defensive move made by some proponents of the group-oriented view: to concede that group states and individual states aren’t of the same specific natural kinds, while holding that groups instantiate different species of mental or cognitive states – perhaps a different species of cognition itself – from those instantiated by humans. In order to evaluate this defense of group cognition, I develop a view of natural kinds – or at least of the sort of evidence that supports inferences to the sameness of natural kind – a view I have previous dubbed the ‘tweak-and-extend’ theory. Guided by the tweak-and-extend approach, I arrive at a tentative conclusion: that what is common to models of individual cognitive processing and models of group processing does not suffice to establish sameness of cognitive (or mental) kinds, properties, or state-types, not even at a generic or overarching level.

Philosophers of mind commonly draw a distinction between the personal level – the distinctive realm of conscious experience and reasoned deliberation – and the subpersonal level, the domain of mindless mechanism and brute cause and effect. Moreover, they tend to view cognitive science through the lens of this distinction. Facts about the personal level are given a priori, by introspection, or by common sense; the job of cognitive science is merely to investigate the mechanistic basis of these facts. I argue that this view misrepresents the structure of cognitive-scientific enquiry. Taken at face value, cognitive science makes no commitment to the existence of a distinctive level at which persons or selves appear. Thus, in the age of cognitive science, we should not expect to find the self in an ontologically distinct realm. Instead, we should expect to locate it in cognitive-scientific models themselves. In closing, I indicate likely results of this approach.

This paper engages critically with anti-representationalist arguments pressed by prominent enactivists and their allies. The arguments in question are meant to show that the “as-such” and “job-description” problems constitute insurmountable challenges to causal-informational theories of mental content. In response to these challenges, a positive account of what makes a physical or computational structure a mental representation is proposed; the positive account is inspired partly by Dretske’s views about content and partly by the role of mental representations in contemporary cognitive scientific modeling.

This paper evaluates the Natural-Kinds Argument for cognitive extension, which purports to show that the kinds presupposed by our best cognitive science have instances external to human organism. Various interpretations of the argument are articulated and evaluated, using the overarching categories of memory and cognition as test cases. Particular emphasis is placed on criteria for the scientific legitimacy of generic kinds, that is, kinds characterized in very broad terms rather than in terms of their fine-grained causal roles. Given the current state of cognitive science, I conclude that we have no reason to think memory or cognition are generic natural kinds that can ground an argument for cognitive extension

In this paper, I claim that extant empirical data do not support a radically embodied understanding of the mind but, instead, suggest (along with a variety of other results) a massively representational view. According to this massively representational view, the brain is rife with representations that possess overlapping and redundant content, and many of these represent other mental representations or derive their content from them. Moreover, many behavioral phenomena associated with attention and consciousness are best explained by the coordinated activity of units with redundant content. I finish by arguing that this massively representational picture challenges the reliability of a priori theorizing about consciousness.

Naturalistically minded philosophers hope to identify a privileged nonsemantic relation that holds between a mental representation m and that which m represents, a relation whose privileged status underwrites the assignment of reference to m. The naturalist can accomplish this task only if she has in hand a nonsemantic criterion for individuating mental representations: it would be question-begging for the naturalist to characterize m, for the purpose of assigning content, as 'the representation with such and such content'. If we individuate mental representations using the tools of dynamical systems theory, we find that a given mental representation, characterized nonsemantically, emerges in the cognitive system as the result of causal interactions between the subject and her environment. At least for the most basic of our mental representations, I argue that the dynamical systems-based approach to individuation increases the plausibility of a theory that assigns reference as a function of the subject's causal history

This paper -distinguishes between the Hypothesis of Extended Cognition and the Hypothesis of Embedded Cognition, characterizing them as competitors (both motivated by situated, interactive cognitive processing, with the latter being the more conservative of the two interpretations of the data) -clarifies the relation between content externalism and extended cognition -introduces the problem of cognitive bloat, as part of a critical discussion of Clark and Chalmers's "past-endorsement criterion" (if the criterion is embraced, we privilege the internal, endorsing process -- which looks more like an embedded view -- and if the criterion is rejected, bloat follows) and as a problem for extended views more generally -develops a dilemma critical of Clark and Chalmers's "explanatory kinds" argument for extended mind and cognition (arguing that their reasoning faces serious problems regardless of whether one individuates the kinds in question in a fine-grained or a coarse-grained way) -argues that an appeal to functionalism doesn't resolve the issue -argues for the priority, in debates about extended cognition, of the identification of cognitive systems (e.g., because a functionalist approach can't be applied unless we already know what count as inputs and outputs, which requires having already identified the boundaries of the cognitive system).

This chapter argues that Simon anticipated what has emerged as the consensus view about human cognition: embodied functionalism. According to embodied functionalism, cognitive processes appear at a distinctively cognitive level; types of cognitive processes (such as proving a theorem) are not identical to kinds of neural processes, because the former can take various physical forms in various individual thinkers. Nevertheless, the distinctive characteristics of such processes — their causal structures — are determined by fine-grained properties shared by various, often especially bodily related, physical processes that realize them. Simon’s apparently anti-embodiment views are surveyed and are shown to be consistent with his many claims that lend themselves to an embodied interpretation and that, to a significant extent, helped to lay the groundwork for an embodied cognitive science.