There is growing interest in understanding and eliciting division of labor within groups of scientists. This paper illustrates the need for this division of labor through a historical example, and a formal model is presented to better analyze situations of this type. Analysis of this model reveals that a division of labor can be maintained in two different ways: by limiting information or by endowing the scientists with extreme beliefs. If both features are present however, cognitive diversity is maintained indefinitely, (...) and as a result agents fail to converge to the truth. Beyond the mechanisms for creating diversity suggested here, this shows that the real epistemic goal is not diversity but transient diversity. (shrink)
Theories of scientific rationality typically pertain to belief. In this paper, the author argues that we should expand our focus to include motivations as well as belief. An economic model is used to evaluate whether science is best served by scientists motivated only by truth, only by credit, or by both truth and credit. In many, but not all, situations, scientists motivated by both truth and credit should be judged as the most rational scientists.
Increasingly, epistemologists are becoming interested in social structures and their effect on epistemic enterprises, but little attention has been paid to the proper distribution of experimental results among scientists. This paper will analyze a model first suggested by two economists, which nicely captures one type of learning situation faced by scientists. The results of a computer simulation study of this model provide two interesting conclusions. First, in some contexts, a community of scientists is, as a whole, more reliable when its (...) members are less aware of their colleagues' experimental results. Second, there is a robust tradeoff between the reliability of a community and the speed with which it reaches a correct conclusion. ‡The author would like to thank Brian Skyrms, Kyle Stanford, Jeffrey Barrett, Bruce Glymour, and the participants in the Social Dynamics Seminar at University of California–Irvine for their helpful comments. Generous financial support was provided by the School of Social Science and Institute for Mathematical Behavioral Sciences at UCI. †To contact the author, please write to: Department of Philosophy, Baker Hall 135, Carnegie Mellon University, Pittsburgh, PA 15213-3890; e-mail: firstname.lastname@example.org. (shrink)
In the latter half of the twentieth century, philosophers of science have argued (implicitly and explicitly) that epistemically rational individuals might compose epistemically irrational groups and that, conversely, epistemically rational groups might be composed of epistemically irrational individuals. We call the conjunction of these two claims the Independence Thesis, as they together imply that methodological prescriptions for scientific communities and those for individual scientists might be logically independent of one another. We develop a formal model of scientific inquiry, define four (...) criteria for individual and group epistemic rationality, and then prove that the four definitions diverge, in the sense that individuals will be judged rational when groups are not and vice versa. We conclude by explaining implications of the inconsistency thesis for (i) descriptive history and sociology of science and (ii) normative prescriptions for scientific communities. (shrink)
In this paper, we develop the notion of a natural convention, and illustrate its usefulness in a detailed examination of indirect requests in English. Our treatment of convention is grounded in Lewis’s seminal account; we do not here redefine convention, but rather explore the space of possibilities within Lewis’s definition, highlighting certain types of variation that Lewis de-emphasized. Applied to the case of indirect requests, which we view through a Searlean lens, the notion of natural convention allows us to give (...) a nuanced answer to the question: Are indirect requests conventional? In conclusion, we reflect on the consequences of our view for the understanding of the semantics/pragmatics divide. (shrink)
Transfer of information between senders and receivers, of one kind or another, is essential to all life. David Lewis introduced a game theoretic model of the simplest case, where one sender and one receiver have pure common interest. How hard or easy is it for evolution to achieve information transfer in Lewis signaling?. The answers involve surprising subtleties. We discuss some if these in terms of evolutionary dynamics in both finite and infinite populations, with and without mutation.
Much of contemporary knowledge is generated by groups not single individuals. A natural question to ask is, what features make groups better or worse at generating knowledge? This paper surveys research that spans several disciplines which focuses on one aspect of epistemic communities: the way they communicate internally. This research has revealed that a wide number of different communication structures are best, but what is best in a given situation depends on particular details of the problem being confronted by the (...) group. (shrink)
Costly signalling theory has become a common explanation for honest communication when interests conflict. In this paper, we provide an alternative explanation for partially honest communication that does not require significant signal costs. We show that this alternative is at least as plausible as traditional costly signalling, and we suggest a number of experiments that might be used to distinguish the two theories.
Those who comment on modern scientific institutions are often quick to praise institutional structures that leave scientists to their own devices. These comments reveal an underlying presumption that scientists do best when left alone—when they operate in what we call the ‘scientific state of nature’. Through computer simulation, we challenge this presumption by illustrating an inefficiency that arises in the scientific state of nature. This inefficiency suggests that one cannot simply presume that science is most efficient when institutional control is (...) absent. In some situations, actively encouraging unpopular, risky science would improve scientific outcomes. 1 Introduction2 Scientists and Bandits3 Choosing an ϵ4 Structure of Communication5 Discussion. (shrink)
Lewis signaling games illustrate how language might evolve from random behavior. The probability of evolving an optimal signaling language is, in part, a function of what learning strategy the agents use. Here we investigate three learning strategies, each of which allows agents to forget old experience. In each case, we find that forgetting increases the probability of evolving an optimal language. It does this by making it less likely that past partial success will continue to reinforce suboptimal practice. The learning (...) strategies considered here show how forgetting past experience can promote learning in the context of games with suboptimal equilibria. (shrink)
In seeking to explain the evolution of social cooperation, many scholars are using increasingly complex game-theoretic models. These complexities often model readily observable features of human and animal populations. In the case of previous games analyzed in the literature, these modifications have had radical effects on the stability and efficiency properties of the models. We will analyze the effect of adding spatial structure to two communication games: the Lewis Sender-Receiver game and a modified Stag Hunt game. For the Stag Hunt, (...) we find that the results depart strikingly from previous models. In all cases, the departures increase the explanatory value of the models for social phenomena. (shrink)
We study a low-rationality learning dynamics called probe and adjust. Our emphasis is on its properties in games of information transfer such as the Lewis signaling game or the Bala-Goyal network game. These games fall into the class of weakly better reply games, in which, starting from any action profile, there is a weakly better reply path to a strict Nash equilibrium. We prove that probe and adjust will be close to strict Nash equilibria in this class of games with (...) arbitrarily high probability. In addition, we compare these asymptotic properties to short-run behavior. (shrink)
This paper approaches the problem of testimony from a new direction. Rather than focusing on the epistemic grounds for testimony, it considers the problem from the perspective of an individual who must choose whom to trust from a population of many would-be testifiers. A computer simulation is presented which illustrates that in many plausible situations, those who trust without attempting to judge the reliability of testifiers outperform those who attempt to seek out the more reliable members of the community. In (...) so doing, it presents a novel defense for the credulist position that argues one should trust testimony without considering the underlying reliability of the testifier. (shrink)
We study the handicap principle in terms of the Sir Philip Sidney game. The handicap principle asserts that cost is required to allow for honest signalling in the face of conflicts of interest. We show that the significance of the handicap principle can be challenged from two new directions. Firstly, both the costly signalling equilibrium and certain states of no communication are stable under the replicator dynamics ; however, the latter states are more likely in cases where honest signalling should (...) apply. Secondly, we prove the existence and stability of polymorphisms where players mix between being honest and being deceptive and where signalling costs can be very low. Neither the polymorphisms nor the states of no communication are evolutionarily stable, but they turn out to be more important for standard evolutionary dynamics than the costly signalling equilibrium. (shrink)
Conformity is an often criticized feature of human belief formation. Although generally regarded as a negative influence on reliability, it has not been widely studied. This paper attempts to determine the epistemic effects of conformity by analyzing a mathematical model of this behavior. In addition to investigating the effect of conformity on the reliability of individuals and groups, this paper attempts to determine the optimal structure for conformity. That is, supposing that conformity is inevitable, what is the best way for (...) conformity effects to occur? The paper finds that in some contexts conformity effects are reliability inducing and, more surprisingly even when it is counterproductive, not all methods for reducing its effect are helpful. These conclusions contribute to a larger discussion in social epistemology regarding the effect of social behavior on individual reliability. (shrink)
We evaluate the asymptotic performance of boundedly-rational strategies in multi-armed bandit problems, where performance is measured in terms of the tendency (in the limit) to play optimal actions in either (i) isolation or (ii) networks of other learners. We show that, for many strategies commonly employed in economics, psychology, and machine learning, performance in isolation and performance in networks are essentially unrelated. Our results suggest that the appropriateness of various, common boundedly-rational strategies depends crucially upon the social context (if any) (...) in which such strategies are to be employed. (shrink)
In recent years, many scholars have suggested that the Baldwin effect may play an important role in the evolution of language. However, the Baldwin effect is a multifaceted and controversial process and the assessment of its connection with language is difficult without a formal model. This paper provides a first step in this direction. We examine a game-theoretic model of the interaction between plasticity and evolution in the context of a simple language game. Additionally, we describe three distinct aspects of (...) the Baldwin effect: the Simpson– Baldwin effect, the Baldwin expediting effect and the Baldwin optimizing effect. We find that a simple model of the evolution of language lends theoretical plausibility to the existence of the Simpson– Baldwin and the Baldwin optimizing effects in this arena, but not the Baldwin expediting effect. (shrink)
Journals regulate a significant portion of the communication between scientists. This paper devises an agent-based model of scientific practice and uses it to compare various strategies for selecting publications by journals. Surprisingly, it appears that the best selection method for journals is to publish relatively few papers and to select those papers it publishes at random from the available “above threshold” papers it receives. This strategy is most effective at maintaining an appropriate type of diversity that is needed to solve (...) a particular type of scientific problem. This problem and the limitation of the model is discussed in detail. (shrink)
This article presents the evolutionary dynamics of three games: the Nash bargaining game, the ultimatum game, and a hybrid of the two. One might expect that the probability that some behavior evolves in an environment with two games would be near the probability that the same behavior evolves in either game alone. This is not the case for the ultimatum and Nash bargaining games. Fair behavior is more likely to evolve in a combined game than in either game taken individually. (...) This result confirms a conjecture that the complexity of our actual environment provides an explanation for the evolution of fair behavior. Key Words: evolutionary game theory Nash bargaining game ultimatum game fairness. (shrink)
The Handicap Principle represents a central theory in the biological understanding of signaling. This paper presents a number of alternative theories to the Handicap Principle and argues that some of these theories may provide a better explanation for the evolution and stability of honest communication.
Recent research into the evolution of higher cognition has piqued an interest in the eﬀect of natural selection on the ability of creatures to respond to their environment (behavioral plasticity). It is believed that environmental variation is required for plasticity to evolve in cases where the ability to be plastic is costly. We investigate one form of environmental variation: frequency dependent selection. Using tools in game theory, we investigate a few models of plasticity and outline the cases where selection would (...) be expected to maintain it. Ultimately we conclude that frequency dependent selection is likely insuﬃcient to maintain plasticity given reasonable assumptions about its costs. This result is very similar to one aspect of the well-discussed Baldwin eﬀect, where plasticity is ﬁrst selected for and then later selected against. We show how in these models one would expect plasticity to grow in the population and then be later reduced. Ultimately we conclude that if one is to account for the evolution of behavioral plasticity in this way, one must appeal to a very particular sort of external environmental variation. (shrink)
Recent research into the evolution of higher cognition has piqued an interest in the effect of natural selection on the ability of creatures to respond to their environment. It is believed that environmental variation is required for plasticity to evolve in cases where the ability to be plastic is costly. We investigate one form of environmental variation: frequency dependent selection. Using tools in game theory, we investigate a few models of plasticity and outline the cases where selection would be expected (...) to maintain it. Ultimately we conclude that frequency dependent selection is likely insuffcient to maintain plasticity given reasonable assumptions about its costs. This result is very similar to one aspect of the well-discussed Baldwin effect, where plasticity is first selected for and then later selected against. We show how in these models one would expect plasticity to grow in the population and then be later reduced. Ultimately we conclude that if one is to account for the evolution of behavioral plasticity in this way, one must appeal to a very particular sort of external environmental variation. (shrink)
The handicap principle is one of the most influential ideas in evolutionary biology. It asserts that when there is conflict of interest in a signaling interaction signals must be costly in order to be reliable. While in evolutionary biology it is a common practice to distinguish between indexes and fakable signals, we argue this dichotomy is an artifact of existing popular signaling models. Once this distinction is abandoned, we show one cannot adequately understand signaling behavior by focusing solely on cost. (...) Under our reframing, cost becomes one—and probably not the most important—of a collection of factors preventing deception. (shrink)
The handicap principle has come under significant challenge both from empirical studies and from theoretical work. As a result, a number of alternative explanations for honest signaling have been proposed. This paper compares the evolutionary plausibility of one such alternative, the "hybrid equilibrium," to the handicap principle. We utilize computer simulations to compare these two theories as they are instantiated in Maynard Smith's Sir Philip Sidney game. We conclude that, when both types of communication are possible, evolution is unlikely to (...) lead to handicap signaling and is far more likely to result in the partially honest signaling predicted by hybrid equilibrium theory. (shrink)
In this paper we show that there are certain limits as to what applications of Maynard Smith’s concept of evolutionarily stable strategy can tell us about evolutionary processes. We shall argue that ESS is very similar in spirit to a particular branch of rational choice game theory, namely, the literature on refinements of Nash equilibrium. In the first place, ESS can also be viewed as a Nash equilibrium refinement. At a deeper level, ESS shares a common structure with other rational (...) choice equilibrium refinements. An equilibrium is evaluated according to whether it persists under specific kinds of perturbations. In the case of ESS, these perturbations are mutations. However, from a dynamical point of view, focusing exclusively on perturbations of equilibria provides only a partial account of the system under consideration. We will show that this has important consequences when it comes to analyzing game-theoretic models of evolutionary processes. In particular, there are non-ESS states which are significant for evolutionary dynamics. (shrink)
Most of us take it for granted that we are free agents: that we can sometimes act so as to shape our own lives and those of others, that we have choices about how to do so and that we are responsible for what we do. But are we really justified in believing this? For centuries philosophers have argued about whether free will and moral responsibility are compatible with determinism or natural causation, and they seem no closer to agreeing about (...) it now than at any time in the past. Many contemporary philosophers have come to the conclusion that the intractability of the old argument about free will and determinism is caused by deep rooted illusions and inconsistencies in our unreflective attitudes about moral responsibility and freedom to act. Kevin Magill challenges this view and argues that the philosophical stalemate about free will has arisen through lack of attention to the content of the experiences that shape our understanding of free will and agency and through a mistaken belief that the concept of moral responsibility requires a moral and metaphysical justification. The book sets out an original account of the various ways we experience choosing, deciding and acting, which reconciles the apparently opposing intuitions that have fuelled the traditional dispute. (shrink)
The changing world of health care finance has led to a paradigm shift in health care with health care being viewed more and more as a commodity. Many have argued that such a paradigm shift is incompatible with the very nature of medicine and health care. But such arguments raise more questions than they answer. There are important assumptions about basic concepts of health care and markets that frame such arguments.
In this paper we examine the epistemic value of highly idealized agent-based models of social aspects of scientific inquiry. On the one hand, we argue that taking the results of such simulations as informative of actual scientific inquiry is unwarranted, at least for the class of models proposed in recent literature. Moreover, we argue that a weaker approach, which takes these models as providing only “how-possibly” explanations, does not help to improve their epistemic value. On the other hand, we suggest (...) that if ABMs of science underwent two types of robustness analysis, they could indeed have a clear epistemic function, namely by providing evidence for philosophical and historical hypotheses. In this sense, ABMs can obtain evidential and explanatory properties and thus be a useful tool for integrated history and philosophy of science. We illustrate our point with an example of a model—building on the work by KevinZollman—which we apply to a concrete historical case study. (shrink)
The idea that there is a fundamental difference in value between persons and things, and that respecting this difference is an important moral requirement, has strong intuitive appeal. Kantian ethics is unique in placing this requirement at the center of a moral system and in explicating the conditions for complying with it. Unlike challenges to Kantian ethics that focus on tragic cases that pit respect for one person against respect for another, this paper focuses on the question of how we (...) can respect the value distinction between persons and things under conditions of uncertainty. After exploring why decision making under uncertainty is a neglected topic among Kantians and demonstrating how uncertainty challenges our ability to comply with this norm, we propose a notion of morally insignificant risk within a framework that allows agents to navigate real-world decisions involving material benefit and some risk to dignity without violating the Kantian’s core commitments. We conclude by exploring some of the challenges facing this approach. (shrink)
In this issue, Alex London and KevinZollman provide an analysis of an influential approach to the ethics of international research, known as the “fair benefits” approach. According to them, the fair benefits approach suffers from a fatal flaw: it is either too vague to be useful, or worse, is internally inconsistent. The fair benefits approach was developed based on a presentation I gave at a workshop organized in Malawi in March 2001 by the National Institutes of Health (...) Clinical Center’s Department of Bioethics. In this presentation, I made what I still think is a valid point, which was accepted by the diverse group of participants and formed the basis of the subsequent publications: One should not .. (shrink)
It is an exciting time to pursue philosophy of religion, not least because of an earnest and widening conversation about what philosophers of religion should be doing in the future. This conversation is driven by factors including the growing presence of philosophers who do not presume as normative the subject position of so-called western traditions of thought, the relentless historicization—especially along Foucaultian lines—of the modern study of religion by critics working across the range of implicated disciplines, and by newly energized (...) emphases in existing methods of the study of religion upon embodiment and upon materiality more generally.Kevin Schilbrack’s Philosophy and the Study of Religions: a Manifesto enters the conversation with an exhibition of clarity and wit, logical strength, and breadth of ambition. Schilbrack argues for expanding the work of philosophy of religion from its traditional task—the examination of theism—to a more inclusive self-understan .. (shrink)
Kevin Schilbrack’s recent book sets out a series of well-considered, well-wrought arguments promoting a lively future for philosophy of religion. In the following comments on selected chapters, I seek to raise questions that require further elaboration of Schilbrack’s constructive vision and/or distinction from alternative visions with which he disagrees.Chapter 1: ‘The Full Task of Philosophy of Religion’Schilbrack begins this chapter characterizing ‘traditional philosophy of religion’ in terms of the task that the discipline sets for itself: to evaluate the rationality (...) of theism. In an illuminating decision tree, Schilbrack analyzes and organizes the variety within TPR, including counter-traditions in Continental and feminist philosophy. More importantly, this procedure helps substantiate the author’s overall critique of TPR as inadequate to the ‘full task’ of philosophy of religion because it is narrow, intellectualistic, and insular. Schilbrack identifies three subordinate ta .. (shrink)
Discussion of J. Kevin O’Regan’s “Why Red Doesn’t Sound Like a Bell: Understanding the Feel of Consciousness” Content Type Journal Article Pages 1-20 DOI 10.1007/s13164-012-0090-7 Authors J. Kevin O’Regan, Laboratoire Psychologie de la Perception, CNRS - Université Paris Descartes, Centre Biomédical des Saints Pères, 45 rue des Sts Pères, 75270 Paris cedex 06, France Ned Block, Departments of Philosophy, Psychology and Center for Neural Science, New York University, 5 Washington Place, New York, NY 10003, USA Journal Review of (...) Philosophy and Psychology Online ISSN 1878-5166 Print ISSN 1878-5158. (shrink)
The national ethical guidelines relevant to assisted reproductive technology have recently been reviewed by the National Health and Medical Research Council. The review process paid particular attention to the issue of non-medical sex selection, although ultimately, the updated ethical guidelines maintain the pre-consultation position of a prohibition on non-medical sex selection. Whilst this recent review process provided a public forum for debate and discussion of this ethically contentious issue, the Victorian case of JS and LS v Patient Review Panel  (...) VCAT 856 provides a rare instance where the prohibition on non-medical sex selection has been explored by a court or tribunal in Australia. This paper analyses the reasoning in that decision, focusing specifically on how the Victorian Civil and Administrative Tribunal applied the statutory framework relevant to ART and its comparison to other uses of embryo selection technologies. The Tribunal relied heavily upon the welfare-of-the-child principle under the Assisted Reproductive Treatment Act 2008. The Tribunal also compared non-medical sex selection with saviour sibling selection. Our analysis leads us to conclude that the Tribunal’s reasoning fails to adequately justify the denial of the applicants’ request to utilize ART services to select the sex of their prospective child. (shrink)
How accurate is Kevin Carson’s characterization of “freed” markets? Carson, a left-libertarian “free market anti-capitalist,” portrays free markets as so radically different from actually-existing markets that they are almost unrecognizable. In The Homebrew Industrial Revolution: A Low Overhead Manifesto, he provides an alternative history of industrialization that argues that large-scale industrial organization and production are largely creatures of state intervention and that truly free markets would be characterized mainly by small-scale production for local markets. This paper evaluates Carson’s narrative (...) in order to determine whether his vision of the freed market is credible. I find that Carson fails to provide sufficient evidence to demonstrate that, but for government intervention, national markets would only exist for a few goods. Furthermore, many of the features he believes freed markets would possess are based on fallacious views of competition, knowledge, capital, and entrepreneurship. (shrink)
Discontented people might talk of corruption in the Commons, closeness in the Commons and the necessity of reforming the Commons, said Mr. Spenlow solemnly, in conclusion; but when the price of wheat per bushel had been the highest, the Commons had been the busiest; and a man might lay his hand upon his heart, and say this to the whole world, – ‘Touch the Commons, and down comes the country!’.
Reading Kevin Hart’s creative hermeneutic of the ‘basileic’ reduction in his latest book, Kingdoms of God, naturally leads me to consider another eminent linguistic phenomenologist who continually occupies my thoughts. Although I have been reading Hart now for about 25 years, I have been reading Paul Ricoeur for a decade longer than that, and it is his theory of poetic discourse that my mind keeps tenaciously associating with Hart’s perspectives on parable. Granted, Hart never mentions Ricoeur in Kingdoms of (...) God—unless my careful reading is not so careful and I missed it! In Trespass of the Sign, however, he does note Ricoeur’s significance as a hermeneutical philosopher, specifically his emphasis on the distinction between the hermeneutics of faith and the hermeneutics of suspicion. Also, in an article on John Caputo’s postsecular philosophy of ‘religion without religion,’ Hart makes a brief comment on Ricoeur’s apparent Hegelianism with reference to a general theory of revelation as nonreligious and nontheistic. Still, nowhere that I know of does he extensively address Ricoeur’s fascinating discourse theory regarding metaphor, mimesis, narrative, and parable. If great minds think alike, then Hart and Ricoeur are, indeed, great minds, for, truly, Ricoeur’s reflections on parables and the Kingdom offer an intriguing gloss on Hart’s parabolic ‘basileiology.’ Translating Hart into Ricoeur, therefore, is, in my mind, an easy and profitable exercise that may well enhance the provocative character of Hart’s basileic reduction. Such a translation is the central purpose of this essay. (shrink)
J. S. Mill's role as a transitional figure between classical and egalitarian liberalism can be partly explained by developments in his often unappreciated economic views. Specifically, I argue that Mill's separation of economic production and distribution had an important effect on his political theory. Mill made two distinctions between economic production and the distribution of wealth. I argue that these separations helped lead Mill to abandon the wages-fund doctrine and adopt a more favorable view of organized labor. I also show (...) how Mill's developments impacted later philosophers, economists, and historians. Understanding the relationship between Mill's political theory and economic theory does not only matter for Mill scholarship, however. Contemporary philosophers often ignore the economic views of their predecessors. I argue that paying insufficient attention to historical political philosophers' economic ideas obscures significant motivations for their political views. (shrink)
As a general claim, most philosophers of science accept that science is not value-free. The disagreements lie in the proverbial details. The essays in Current Controversies in Values and Science, edited by Kevin Elliott and Daniel Steel focus on such details. Like other volumes in the Routledge Current Controversies in Philosophy’s series, this one asks ten well-known philosophers of science to engage with various questions. Each question receives roughly positive and negative responses, though the authors’ nuanced answers make clear (...) that the contrasting views also involve significant agreement.The first question asks whether we can distinguish epistemic from nonepistemic values. Hugh Lacey argues that such... (shrink)