Deep neural networks (DNNs) have had extraordinary successes in classifying photographic images of objects and are often described as the best models of biological vision. This conclusion is largely based on three sets of findings: (1) DNNs are more accurate than any other model in classifying images taken from various datasets, (2) DNNs do the best job in predicting the pattern of human errors in classifying objects taken from various behavioral datasets, and (3) DNNs do the best job in predicting (...) brain signals in response to images taken from various brain datasets (e.g., single cell responses or fMRI data). However, these behavioral and brain datasets do not test hypotheses regarding what features are contributing to good predictions and we show that the predictions may be mediated by DNNs that share little overlap with biological vision. More problematically, we show that DNNs account for almost no results from psychological research. This contradicts the common claim that DNNs are good, let alone the best, models of human object recognition. We argue that theorists interested in developing biologically plausible models of human vision need to direct their attention to explaining psychological findings. More generally, theorists need to build models that explain the results of experiments that manipulate independent variables designed to test hypotheses rather than compete on making the best predictions. We conclude by briefly summarizing various promising modeling approaches that focus on psychological data. (shrink)

John Rawls says that one of the requirements for stability is “[s]ociety as an employer of last resort” (PLP, lix). He explains: “[t]he lack of . . . the opportunity for meaningful work and occupation is destructive . . . of citizens’ self-respect” (PLP, lix). Rawls implies in these claims that the opportunity for meaningful work is a social basis of self-respect. This constitutes a significant shift in his account of self-respect, one that has been overlooked. I begin by clarifying (...) Rawls’s account of self-respect in A Theory of Justice, then consider some post-Theory developments in it. After exploring the nature of Rawls’s commitment to the opportunity for meaningful work, I ask why he comes to think it is a social basis of self-respect. I extract a partial answer from his writings, then speculate about his full reasoning. Finally, I consider whether Rawls is right that the opportunity for meaningful work is a social basis of self-respect. I give some reason to believe that he is. (shrink)

A central job for propositions is to be the objects of the attitudes. Propositions are the things we doubt, believe and suppose. Some philosophers have thought that propositions are sets of possible worlds. But many have become convinced that such an account individuates propositions too coarsely. This raises the question of how finely propositions should be individuated. An account of how finely propositions should be individuated on which they are individuated very finely is sketched. Objections to the effect that the (...) account individuates propositions too finely are raised and responses to the objections are provided. It is also shown that theories that try to individuate propositions less finely have serious problems. (shrink)

Assume that the only thing before you is a statue made of some alloy. Call those who think that there is one thing before you in such a case monists. Call those who think there are at least two things before you in such a case pluralists. The most common arguments for pluralism run as follows. The statue is claimed to have some property P that the piece of alloy lacks (or vice versa), and hence it is concluded that they (...) are distinct. Most often, the predicates employed in such arguments to express the crucial property are predicates expressing ‘temporal properties’, such as existing at a certain time; or ‘modal properties’, such as possibly being spherical; or ‘constitution properties’, such as being made of a certain sort of material. In a recent paper, Kit Fine has noted that such predicates suffer from various defects that make it possible for the monist to plausibly resist the relevant versions of the pluralist's arguments. For this reason, Fine considers a number of predicates that do not suffer from these defects, and constructs new versions of the above argument using them. Fine argues that any attempt on the monist's part to resist his versions of the argument force the monist to adopt implausible positions in the philosophy of language. As against this, I argue that the monist has perfectly plausible responses to Fine's arguments that require the monist to adopt only quite reasonable positions in the philosophy of language. (shrink)

result from combining the determiners `this' or `that' with syntactically simple or complex common noun phrases such as `woman' or `woman who is taking her skis off'. Thus, `this woman', and `that woman who is taking her skis off' are complex demonstratives. There are also plural complex demonstratives such as `these skis' and `those snowboarders smoking by the gondola'. My book Complex Demonstratives: A Quantificational Account argues against what I call the direct reference account of complex demonstratives (henceforth DRCD) and (...) defends a quantificational account of complex demonstratives. In two recent papers, Nathan Salmon has criticized one of the book's arguments against DRCD. In this essay I show that Salmon's criticism fails. I also show that the version of DRCD that Salmon ends up endorsing is false. (shrink)

David Lewis (1969) introduced sender-receiver games as a way of investigating how meaningful language might evolve from initially random signals. In this report I investigate the conditions under which Lewis signaling games evolve to perfect signaling systems under various learning dynamics. While the 2-state/2- term Lewis signaling game with basic urn learning always approaches a signaling system, I will show that with more than two states suboptimal pooling equilibria can evolve. Inhomogeneous state distributions increase the likelihood of pooling equilibria, but (...) learning strategies with negative reinforcement or certain sorts of mutation can decrease the likelihood of, and even eliminate, pooling equilibria. Both Moran and APR learning strategies (Bereby-Meyer and Erev 1998) are shown to promote successful convergence to signaling systems. A model is presented that illustrates how a language that codes state-act pairs in an order-based grammar might evolve in the context of a Lewis signaling game. The terms, grammar, and the corresponding partitions of the state space co-evolve to generate a language whose structure appears to reflect canonical natural kinds. The evolution of these apparent natural kinds, however, is entirely in service of the rewards that accompany successful distinctions between the sender and receiver. Any metaphysics grounded on the structure of a natural language that evolved in this way would track arbitrary, but pragmatically useful distinctions. (shrink)

The article reflects on where AI is headed and the world along with it, considering trust, ethics and safety. Implicit in artificial thinking and doomsday appraisals is the engineered divorce from reality of sublime human embodiment. Jeffrey White, Dietrich Brandt, Jan Soeffner, and Larry Stapleton, four scholars associated with AI & Society, address these issues, and more, in the following exchange.

Main deficiency of active people. Active men are usually lacking in higher activity—I mean, individual activity. They are active as officials, businessmen, scholars, that is, as generic beings....Active people roll like a stone, conforming to the stupidity of mechanics. Friedrich Nietzsche, Human, All Too Human.

There is good reason to suppose that our best physical theories, quantum mechanics and special relativity, are false if taken together and literally. If they are in fact false, then how should they count as providing knowledge of the physical world? One might imagine that, while strictly false, our best physical theories are nevertheless in some sense probably approximately true. This paper presents a notion of local probable approximate truth in terms of descriptive nesting relations between current and subsequent theories. (...) This notion helps explain how false physical theories might nevertheless provide physical knowledge of a variety that is particularly salient to diachronic empirical inquiry. (shrink)

The purpose of this entry is to provide a systematic introduction to medieval views about the nature and ontological status of relations. Given the current state of our knowledge of medieval philosophy, especially with regard to relations, it is not possible to discuss all the nuances of even the best known medieval philosophers' views. In what follows, therefore, we shall restrict our aim to identifying and describing (a) the main types of position that were developed during the Middle Ages, and (...) (b) the most important considerations that shaped their development. We shall have occasion along the way, however, to examine in detail certain aspects of the views of important representatives of all the main medieval positions, including Peter Abelard (1079 1142), Gilbert of Poitiers (1085 1154), Albert the Great, (1200 1280), Thomas Aquinas (1225 1274), John Duns Scotus (1265 1308), Henry Harclay (1270 1317), Peter Auriol (1280 1322), and William Ockham (1285 1347). (shrink)

The Tree of Life hypothesis frames the evolutionary process as a series of events whereby lineages diverge from one another, thus creating the diversity of life as descendent lineages modify properties from their ancestors. This hypothesis is under scrutiny due to the strong evidence for lateral gene transfer between distantly related bacterial taxa, thereby providing extant taxa with more than one parent. As a result, one argues, the Tree of Life becomes confounded as the original branching structure is gradually superseded (...) by reticulation, ultimately losing its ability to serve as a model for bacterial evolution. Here we address a more fundamental issue: is there a Tree of Life that results from bacterial evolution without considering such lateral gene transfers? Unlike eukaryotic speciation events, lineage separation in bacteria is a gradual process that occurs over tens of millions of years, whereby genetic isolation is established on a gene-by-gene basis. As a result, groups of closely related bacteria, while showing robust genetic isolation as extant lineages, were not created by an unambiguous series of lineage-splitting events. Rather, a temporal fragmentation of the speciation process results in cognate genes showing different genetic relationships. We argue that lineage divergence in bacteria does not produce a tree-like framework, and inferences drawn from such a framework have the potential to be incorrect and misleading. Therefore, the Tree of Life is an inappropriate paradigm for bacterial evolution regardless of the extent of gene transfer between distantly related taxa. (shrink)

After years of skepticism and denials regarding the significance of concussions in sport, the issue is now front and center. This is fitting, given that the impact of concussions in sport is profound. Thus, it is with trepidation that one ventures to direct some attention onto brain injuries other than concussions incurred through sport. Given a closer look, however, it may be that considering various kinds of brain injuries, with different causes, will help us better understand the range and seriousness (...) of brain injuries in sport. My focus is on emotional trauma in sport. I argue that severe emotional pathology is evidence of underlying brain injury. Any attempt to minimize the significance of emotional disturbance that results from emotional trauma as ‘merely’ psychological in nature is thus misguided. (shrink)

The field of psychology, including cognitive science, is vexed by a crisis of confidence. Although the causes and solutions are varied, we focus here on a common logical problem in inference. The default mode of inference is significance testing, which has a free lunch property where researchers need not make detailed assumptions about the alternative to test the null hypothesis. We present the argument that there is no free lunch; that is, valid testing requires that researchers test the null against (...) a well-specified alternative. We show how this requirement follows from the basic tenets of conventional and Bayesian probability. Moreover, we show in both the conventional and Bayesian framework that not specifying the alternative may lead to rejections of the null hypothesis with scant evidence. We review both frequentist and Bayesian approaches to specifying alternatives, and we show how such specifications improve inference. The field of cognitive science will benefit because consideration of reasonable alternatives will undoubtedly sharpen the intellectual underpinnings of research. (shrink)

Insofar as empirical inquiry involves the coevolution of descriptive language and theoretical commitments, a satisfactory model of empirical knowledge should describe the coordinated evolution of both language and theory. But since we do not know what conceptual resources we might need to express our future theories or to provide our best future faithful descriptions of the world, we do not now know even what the space of future descriptive options might be. One strategy for addressing this shifting-resource problem is to (...) track the predictive and linguistic dispositions of inquirers rather than to track their theories and conceptual resources directly. Sender-predictor games, a variant of Skyrms–Lewis sender-receiver games, provide very simple models for the coordinated coevolution of predictive and linguistic dispositions. Such models explain how it is possible for (1) predictive and descriptive dispositions of inquirers to coevolve, (2) term-wise incommensurable, but nevertheless descriptively faithful languages, to sequentially evolve, and (3) a sort of underdetermination to occur where inquirers might satisfy their descriptive and predictive aims by revising their linguistic dispositions, their theoretical dispositions, or both. Such models also provide an elementary characterization of what it might mean for descriptions of the world to be faithful and hence for empirical inquiry to be successful. In doing so they provide a relatively weak, but perfectly clear, endogenous account of epistemic norms. (shrink)

Hugh Everett III proposed his relative-state formulation of pure wave mechanics as a solution to the quantum measurement problem. He sought to address the theory’s determinate record and probability problems by showing that, while counterintuitive, pure wave mechanics was nevertheless empirically faithful and hence empirical acceptable. We will consider what Everett meant by empirical faithfulness. The suggestion will be that empirical faithfulness is well understood as a weak variety of empirical adequacy. The thought is that the very idea of empirical (...) adequacy might be renegotiated in the context of a new physical theory given the theory’s other virtues. Everett’s argument for pure wave mechanics provides a concrete example of such a renegotiation. (shrink)

In this piece, the editor of Common Knowledge introduces a long-term project titled “Antipolitics: Symposium in Memory of György Konrád.” Konrád, who died in 2019, was a founding member of the Common Knowledge editorial board, and the symposium is meant to find present-day applications for the arguments of his book Antipolitics, published in 1982 in Hungarian. Although written under Cold War conditions and to that extent dated, the book is directed against politics and politicians as such: “What Machiavelli's Prince is (...) to would-be rulers, Antipolitics should be for those resistant to being ruled — a treasury of axioms and apothegms,” which this editorial collects, updates, and analyzes. Given that democratic systems and constitutions are “open and subject to further development,” Konrád urges us to devise and run experiments in governance that apply “creative imagination” to problems that, in better times, we might leave to politicians to resolve. “The crisis for democracy today,” Perl argues, “is that bad government (as Konrád, Václav Havel, and Adam Michnik defined it in the 1980s) appears to be what various electorates crave and therefore choose.” Realizing that elections produce, as Aristotle said, oligarchy rather than democracy, we should rethink majority rule and experiment with sortition as a counterpolitical means of self-government. (shrink)

The international pharmaceutical industry has made significant efforts towards ensuring compliant and ethical communication and interaction with physicians and patients. This article presents the current status of the worldwide governance of communication practices by pharmaceutical companies, concentrating on prescription-only medicines. It analyzes legislative, regulatory, and code-based compliance control mechanisms and highlights significant developments, including the 2006 and 2012 revisions of the International Federation of Pharmaceutical Manufacturers and Associations (IFPMA) Code of Practice.

Guiding our response in this essay is our view that current efforts to demarcate the role of the clinical ethicist risk reducing its complex network of authorizations to sites of power and payment. In turn, the role becomes susceptible to various ideologies—individualisms, proceduralisms, secularisms—that further divide the body from the web of significances that matter to that body, where only she, the patient, is located. The security of policy, standards, and employment will pull against and eventually sever the authorization secured (...) by authentic moral inquiry. Instead of asking “What do I need to know?”, the question animating the drive to standardize will be “What is the policy or standard?” The claims of the authors in this issue of HEC Forum confirm these suspicions. (shrink)

In this introduction to Part 1 of “Contextualism—the Next Generation: Symposium on the Future of a Methodology,” the editor of Common Knowledge, a “journal of left-wing Kuhnian opinion,” reports that the new symposium responds to contextualist criticism of the previous CK symposium, which was on xenophilia. The content of the earlier symposium met with objections, from contextualists, on the grounds of methodology, and the new symposium questions the methodology of contextualism for the limits that it places on content as well (...) as on normative aims and degree of focus. Tracing the origins of contextualism to Kuhn and his theory that paradigms of scientific knowledge are incommensurable, this essay then argues that Kuhnian method is formal, with scant concern for content, and that Kuhn’s work was vatic, more than philosophical or historical. Kuhn’s depiction of his sudden, blinding realization that Aristotelian physics is correct in its own context is assessed as an ironic application of biblical scenes of revelation to what is, essentially, a process of scrupulous, piecemeal scholarship. What Kuhn unknowingly wanted, the essay concludes, was a combination of contextualism and phenomenology, as a means of knowing what it was like to believe in Aristotelian, as opposed to modern, concepts of matter, quality, space, void, position, change, and motion. The essay then introduces the first contribution to the new symposium: a monograph retrieving geometrical and taxonomic—Euclidean and Theophrastan—idioms of discourse about fictional characters and inquiring into their changing affective content. (shrink)

A solution to the measurement problem of quantum mechanics is proposed within the framework of an intepretation according to which only quantum systems with an infinite number of degrees of freedom have determinate properties, i.e., determinate values for (some) observables of the theory. The important feature of the infinite case is the existence of many inequivalent irreducible Hilbert space representations of the algebra of observables, which leads, in effect, to a restriction on the superposition principle, and hence the possibility of (...) defining (macro-) observables which commute with every observable. Such observables have determinate values which are not subject to quantum interference effects. A measurement process is schematized as an interaction between a microsystem and a macrosystem, idealized as an infinite quantum system, and it is shown that there exists a unitary transformation which transforms the initial pure state of the composite system in a finite time (the duration of the interaction) into the required mixture of disjoint states. (shrink)

There is a long tradition of trying to find a satisfactory interpretation of Everett's relative-state formulation of quantum mechanics. Albert and Loewer recently described two new ways of reading Everett: one we will call the single-mind theory and the other the many-minds theory. I will briefly describe these theories and present some of their merits and problems. Since both are no-collapse theories, a significant merit is that they can take advantage of certain properties of the linear dynamics, which Everett apparently (...) considered to be important, to constrain their statistical laws. (shrink)

In this introduction to part 3 of the Common Knowledge symposium “Antipolitics,” the journal's editor argues that, apart from sortition, the best guarantees of safety in a democracy are, first, to augment judicial oversight of all political processes and, second, to exclude politicians from the process of selecting judges. “There can never be too much judicial interference,” he writes, “in what politicians regard as their domain.” The author reached this conclusion during attempts by the newly elected Israeli government, in the (...) spring of 2023, to make itself absolute by eliminating checks on its conduct that the Supreme Court had been developing and applying since the 1950s. Traditional Jewry and Judaism being notoriously hypernomian, the resistance to legality on the part of the ruling coalition has conveyed an aura of antinomian heresy. The choice in Israel appears to be between antipolitics and antinomianism, rather than between Left and Right politically—and the antipolitical model in Israel of a superintendent judiciary and an autonomous attorney general is arguably superior to the American prototype, even from the perspective (“all men are created equal..., endowed by their Creator with certain unalienable Rights”) that we have come to regard as quintessentially American. (shrink)

The questions examined in the book speak directly to neuroscientists, computer scientists, psychologists, and philosophers.

Zaller's Nature and Origins of Mass Opinion initially sets out an epistemic view of politics in which the ultimate determinants of political action are ideas about the society in which we act. These ideas are usually mediated to us by others, so Zaller begins the book by describing its topic as the influence of the media on public opinion, and he includes journalists among the “political elites” who exert this influence (along with politicians, public officials, and experts). But the book (...) eventually reduces journalists to being messengers of politicians' cues to the public. This understanding of the media is built into the book's model of opinion formation, in which cued predispositions are pivotal to the acceptance or rejection of culturally mediated “messages”—but are themselves insulated from cultural influence. A cueing model of message reception, however, ignores messages that are differentially persuasive not because of the predispositions they cue but the content they convey. Gauging the heterogeneous persuasiveness of messages requires qualitative content analysis and cultural contextualization, and if this research is to contribute to a general understanding of public opinion, it will have to extend beyond news-media messages to ideational influences carried in high culture, formal education, and the entertainment media. All of these sources of ideas, in turn, may contribute to the shaping of predispositions, as suggested in part by public opinion regarding the Vietnam War. Research of this kind would signal a new type of political science that focused on the actual thoughts of real people trying to understand a complex environment: exactly the type of political science suggested at the beginning of Zaller's book. (shrink)

This paper explores whether resolving to "live like there's no tomorrow" would be conducive to living life to the fullest. While there is much to commend a life lived with a sense of urgency, I conclude that living like there's no tomorrow, in the final analysis, is neither advisable, nor realizable. In its place I suggest a life lived in mindfulness of the transitory and uncertain nature of our lives.

Concussions in professional sports have received increased attention, which is partly attributable to evidence that found concussion incidence rates were much higher than previously thought. Further to this, professional hockey players articulated how their concussion symptoms affected their professional careers, interpersonal relationships, and qualities of life. Researchers are beginning to associate multiple/repeated concussions with Chronic Traumatic Encephalopathy, a structural brain injury that is characterized by tau protein deposits in distinct areas of the brain. Taken together, concussions impact many people in (...) the sporting community from current and former professional athletes and their families to medical and health professionals and researchers. In light of the growing awareness and sensitivity towards concussions, the purpose of this paper is to provide recommendations that are designed to improve player safety in professional hockey and address the ethical issues surrounding these suggestions. (shrink)

Many people believe that some things, like kidneys or sex, should not be for sale. Let us call these things “contested commodities.” Against this, Brennan and Jaworksi defend “markets without limits” (hereafter: MwL). According to this thesis: “If you may do it for free, you may do it for money” (2016, p. 10). Since we can give away our kidneys for free and have sex for free, we should be able to do these things for money. Brennan and Jaworksi deftly (...) blend rigorous philosophical argument with the latest research in social science to counter some of the most prominent against commodification. But, I will argue, their arguments stop short of establishing MwL. Brennan and Jaworksi do not say enough in favor of markets in contested commodities. (shrink)