The acquisition of English noun and verb morphology is modeled using a single-system connectionist network. The network is trained to produce the plurals and past tense forms of a large corpus of monosyllabic English nouns and verbs. The developmental trajectory of network performance is analyzed in detail and is shown to mimic a number of important features of the acquisition of English noun and verb morphology in young children. These include an initial error-free period of performance on both nouns and (...) verbs followed by a period of intermittent over-regularization of irregular nouns and verbs. Errors in the model show evidence of phonological conditioning and frequency effects. Furthermore, the network demonstrates a strong tendency to regularize denominal verbs and deverbal nouns and masters the principles of voicing assimilation. Despite their incorporation into a single-system network, nouns and verbs exhibit some important differences in their profiles of acquisition. Most importantly, noun inflections are acquired earlier than verb inflections. The simulations generate several empirical predictions that can be used to evaluate further the suitability of this type of cognitive architecture in the domain of inflectional morphology. (shrink)

How many words is a bilingual 2-year-old supposed to know or say in each of her languages? Speech and language therapists or researchers lack the tools to answer this question, because several factors have an impact on bilingual language skills: gender, amount of exposure, mode of acquisition, socio-economic status and the distance between L1 and L2. Unfortunately, these factors are usually studied separately, making it difficult to evaluate their weight on a unique measure of vocabulary. The present study measures the (...) contribution of the following factors to the vocabulary scores of bilingual toddlers: i) gender; ii) sibling ranking; iii) relative amount of exposure to each language; iv) mode of exposure; v) SES; vi) linguistic distance; vii) language spoken between parents. Close to the child’s second birthday, parents of 278 UK-based bilinguals completed successively: a 100-word version of the Oxford-CDI, the CDI in the child’s Additional Language, a family questionnaire, and the Language Exposure Questionnaire. Thirty-six British-English-AL pairs were considered, with languages contrasted on a second-language-learning scale : for example, Dutch and French are close to British-English, while Polish or Cantonese are more distant. Data from the corpus were included in two mixed-effect models, one with the English scores in comprehension as the dependent variable, and the other with production scores. The seven factors listed above were included as predictors. The amount of English exposure was the strongest predictor of comprehension scores = 9.35, p <.005, β = 0.02, t = 3.08, p <.005), followed by the language that parents speak between themselves = 14.94, p <.001, β = 1.37, t = 3.76, p <.0005), linguistic distance = 6.92, p <.01, β = -0.74, t = -2.66, p <.01) and age = 4.86, p <.05, β = 0.55, t = 2.17, p <.05). In production, gender = 13.57, p <.0005, β = -0.91, t = -03.72, p <.0005), amount of exposure to English = 13.57, p <.0005, β = -0.91, t = -03.72, p <.0005), the language that parents speak between themselves = 11.85, p <.005, β = 1.09, t = 3.41, p <.001), and the mother’s occupation = 4.51, p <.05, β = 0.63, t = 2.13, p <.05) were the significant predictors. The more English parents use to address one another, the more English words the child says and understands. This surprising result could be simply explained by the fact that parents who speak English together are also more likely to speak English to their child. The main results of this study is that linguistic distance is a powerful predictor of toddlers’ vocabulary in English, with children learning two close languages growing their vocabulary faster than those learning distant languages. (shrink)

Comments on G. Marcus' criticisms (see record 1996-24670-001) of K. Plunkett's and V. Marcham's (see record 1994-35650-001) connectionist account of the acquisition of the English past tense (verb morphology). The original model is reviewed. Graphing, overregularization, and other criticisms are addressed (PsycINFO Database Record (c) 2000 APA, all rights reserved).

Take “legal reality” to be the part of reality that actual legal thought and talk is dis- tinctively about, such as legal institutions, legal obligations, and legal norms. Our goal is to explore whether legal reality is disunified. To illustrate the issue, consider the possibility that an important metaphysical thesis such as positivism is true of one part of legal reality (legal institutions), but not another (legal norms). We offer two arguments that suggest that legal reality is disunified: one concerns (...) the heteroge- neity of different entities that are part of legal reality; the other concerns variation within legal thought and talk. We then show that taking the possibility of the disunity of legal reality seriously has important upshots for how we think about the positivist and antipositivist traditions, the debate between them, and their relation to other parts of legal theory, such as critical legal theory and legal realism. (shrink)

How do scientific explanations for beliefs affect people's confidence that those beliefs are true? For example, do people think neuroscience-based explanations for belief in God support or challenge God's existence? In five experiments, we find that people tend to think explanations for beliefs corroborate those beliefs if the explanations invoke normally-functioning mechanisms, but not if they invoke abnormal functioning (where “normality” is a matter of proper functioning). This emerges across a variety of kinds of scientific explanations and beliefs (religious, moral, (...) and scientific). We also find evidence that these effects can interact with people's prior beliefs to produce motivated judgments. (shrink)

In this paper, we consider how the notion of metalinguistic negotiation interacts with various theories of generics. The notion of metalinguistic negotiation we discuss stems from previous work from two of us (Plunkett and Sundell). Metalinguistic negotiations are disputes in which speakers disagree about normative issues concerning language, such as issues about what a given word should mean in the relevant context, or which of a range of related concepts a word should express. In a metalinguistic negotiation, speakers argue (...) about such issues implicitly, via competing “metalinguistic” usages of terms. Here, we argue that some disputes involving generics are best thought of as metalinguistic negotiations, and that these cases can be illuminating for our more general theorizing about generics. Specifically, we argue that the “contextualist” theory of generics that one of us (Sterken) has developed in other work is best equipped to account for these metalinguistic negotiations, relative to other leading views of generics. We thus argue for a “package deal” view of generics: a view that combines Plunkett and Sundell’s account of metalinguistic negotiation with Sterken’s contextualist view of generics. (shrink)

Which concepts should we use to think and talk about the world and to do all of the other things that mental and linguistic representation facilitates? This is the guiding question of the field that we call ‘conceptual ethics’. Conceptual ethics is not often discussed as its own systematic branch of normative theory. A case can nevertheless be made that the field is already quite active, with contributions coming in from areas as diverse as fundamental metaphysics and social/political philosophy. In (...) this pair of papers, we try to unify the field, reflecting on its basic nature, structure, and methodology. (shrink)

In constructing semantic theories of normative and evaluative terms, philosophers have commonly deployed a certain type of disagreement -based argument. The premise of the argument observes the possibility of genuine disagreement between users of a certain normative or evaluative term, while the conclusion of the argument is that, however differently those speakers employ the term, they must mean the same thing by it. After all, if they did not, then they would not really disagree. We argue that in many of (...) the cases in which this argument is deployed, the conclusion not only fails to follow from the premises, but is very likely false. Disagreements between speakers who do not mean the same things by their words are common, genuine, and not easily distinguished from ordinary disagreements over the truth of literally expressed content. We make this case by developing the notion of a metalinguistic negotiation, an exchange in which speakers tacitly negotiate the proper deployment of some linguistic expression in a context. Metalinguistic negotiations express disagreements over information that is conveyed pragmatically and about what concepts should be deployed in the context at hand. We argue that neither of these features poses any obstacle to metalinguistic negotiations serving to express genuine, substantive disagreements that can be well worth engaging in. Contrary to what has been widely assumed in the literature, many normative and evaluative disputes—among ordinary speakers and even among philosophers themselves—may be of exactly this type, a conclusion with important consequences for both the subject matter and the methodology of metanormative theory. (shrink)

Conceptual engineering and conceptual ethics are branches of philosophy concerned with questions about how to assess and ameliorate our representational devices (such as concepts and words). It's a part of philosophy concerned with questions about which concepts we should use (and why), how concepts can be improved, when concepts should be abandoned, and how proposals for amelioration can be implemented. Central parts of the history of philosophy have engaged with these issues, but the focus of this volume is on applications (...) to work in contemporary philosophy of language and mind, epistemology, gender and race theory, ethics, philosophy of science, and philosophical logic. This is the first volume devoted entirely to conceptual engineering and conceptual ethics. The volume explores the possibilities, benefits, problems, and applications of conceptual engineering and conceptual ethics. It consists of twenty chapters written by leading philosophers. (shrink)

In recent work, we have argued that a number of disputes of interest to philosophers – including some disputes amongst philosophers themselves – are metalinguistic negotiations. Prima facie, many of these disputes seem to concern worldly, non-linguistic issues directly. However, on our view, they in fact concern, in the first instance, normative questions about the use of linguistic expressions. This will strike many ordinary speakers as counterintuitive. In many of the disputes that we analyze as metalinguistic negotiations, speakers might quite (...) strongly resist the idea that their debate is in any sense about language. In this paper, we explore and provide responses to what we take to be the best versions of an objection that our view involves an unacceptable attribution of false beliefs to ordinary speakers. (shrink)

In this Introduction, we aim to introduce the reader to the basic topic of this book. As part of this, we explain why we are using two different expressions (‘conceptual engineering’ and ‘conceptual ethics’) to describe the topics in the book. We then turn to some of the central foundational issues that arise for conceptual engineering and conceptual ethics, and finally we outline various views one might have about their role in philosophy and inquiry more generally.

This paper is about philosophical disputes where the literal content of what speakers communicate concerns such object-level issues as ground, supervenience, or real definition. It is tempting to think that such disputes straightforwardly express disagreements about these topics. In contrast to this, I suggest that, in many such cases, the disagreement that is expressed is actually one about which concepts should be employed. I make this case as follows. First, I look at non-philosophical, everyday disputes where a speaker employs a (...) metalinguistic usage of a term. This is where a speaker uses a term to express a view about the meaning of that term, or, relatedly, how to correctly use that term. A metalinguistic negotiation is a metalinguistic dispute that concerns a normative issue about what a word should mean, or, similarly, about how it should be used, rather than the descriptive issue about what it does mean. I argue that the same.. (shrink)

Which concepts should we use to think and talk about the world and to do all of the other things that mental and linguistic representation facilitates? This is the guiding question of the field that we call ‘conceptual ethics’. Conceptual ethics is not often discussed as its own systematic branch of normative theory. A case can nevertheless be made that the field is already quite active, with contributions coming in from areas as diverse as fundamental metaphysics and social/political philosophy. In (...) this pair of papers, we try to unify the field, reflecting on its basic nature, structure, and methodology. (shrink)

In this article, we propose a novel account of general jurisprudence by situating it within the broader project of metanormative inquiry. We begin by showing how general jurisprudence is parallel to another well-known part of that project, namely, metaethics. We then argue that these projects all center on the same task: explaining how a certain part of thought, talk, and reality fits into reality overall. Metalegal inquiry aims to explain how legal thought, talk, and reality fit into reality. General jurisprudence (...) is the part of metalegal inquiry that focuses on universal legal thought, talk, and reality. (shrink)

In this paper, I argue that facts about the history or genealogy of concepts (facts about what I call “conceptual history”) can matter for normative inquiry. I argue that normative and evaluative issues about concepts (such as issues about which concepts an agent should use, in a given context) matter for all forms of inquiry (including normative inquiry) and that conceptual history can help us when we engage in thinking about these normative and evaluative issues (which I call issues in (...) “conceptual ethics”). My aim in making this argument is to develop a schematic framework for thinking about the relationship between conceptual history and normative inquiry. The framework puts pressure on those who, often unreflectively or implicitly, dismiss the potential relevance of conceptual history to normative inquiry. At the same time, the framework can be seen as presenting a challenge to those drawn to more radical views about the relationship between conceptual history and normative inquiry. The challenge is this: if one wants a more ambitious model of the relevance of conceptual history to normative inquiry than what I provide in this paper, one needs to explain what justifies such a model. (shrink)

Which concepts should we use to think and talk about the world, and to do all of the other things that mental and linguistic representation facilitates? This is the guiding question of the field that we call ‘conceptual ethics’. Conceptual ethics is not often discussed as its own systematic branch of normative theory. A case can nevertheless be made that the field is already quite active, with contributions coming in from areas as diverse as fundamental metaphysics and social/political philosophy. In (...) this pair of papers, we try to unify the field, reflecting on its basic nature, structure, and methodology. (shrink)

Four experiments investigate the folk concept of “understanding,” in particular when and why it is deployed differently from the concept of knowledge. We argue for the positions that people have higher demands with respect to explanatory depth when it comes to attributing understanding, and that this is true, in part, because understanding attributions play a functional role in identifying experts who should be heeded with respect to the general field in question. These claims are supported by our findings that people (...) differentially withhold attributions of understanding when the object of attribution has minimal explanatory information. We also show that this tendency significantly correlates with people’s willingness to defer to others as potential experts. This work bears on a pressing issue in epistemology concerning the place and value of understanding. Our results also provide reason against positing a simple equation of knowledge and understanding. We contend that, because deference plays a crucial role in many aspects of everyday reasoning, the fact that we use understanding attributions to demarcate experts reveals a potential mechanism for achieving our epistemic aims in many domains. (shrink)

ABSTRACT:In this article, we review and build on intergenerational and behavioral ethics research to consider how the motive to build a lasting legacy can impact ethical behavior in intergenerational decision making. We discuss how people can utilize their relationships to organizations to craft their legacies. Further, we elucidate how the legacy motive can enhance business ethics, incorporating theory and empirical findings from research on intergenerational decision making, generativity, and terror management theory to develop the legacy construct and to outline the (...) psychological underpinnings of motivations to leave a positive legacy. We discuss the ways in which legacies can provide a link between life-meaning and pro-social motivation, and we consider the ways in which individuals’ social environments can moderate the intensity of the legacy motive and can impact legacy-building behavior by determining the types of legacies that are valued. Finally, we highlight the implications of these ideas for ethical behavior and sustainable decision making in business contexts. (shrink)

This chapter discusses two different issues about the relationship between legal positivism and robust normativity (understood as the most authoritative kind of normativity to which we appeal). First, the chapter argues that, in many contexts when discussing “legal positivism” and “legal antipositivism”, the discussion should be shifted from whether legal facts are ultimately partly grounded in moral facts to whether they are ultimately partly grounded in robustly normative facts. Second, the chapter explores an important difference within the kinds of arguments (...) that legal philosophers give for the (purported) truth of legal positivism. The difference concerns whether (purportedly) robustly normative facts are appealed to as premises in those arguments or not. (A closely connected issue is whether (purportedly) normative facts that bear one or more important connections to robustly normative facts are appealed to in premises to those arguments.) The chapter argues that thinking about this dividing line helps people better situate the positivist/antipositivist dispute, better understand the space of views in legal philosophy, better evaluate those views, and avoid having merely verbal disputes. (shrink)

Speech and thought about what the law is commonly function in practical ways, to guide or assess behavior. These functions have often been seen as problematic for legal positivism in the tradition of H.L.A. Hart. One recent response is to advance an expressivist analysis of legal statements (Toh), which faces its own, familiar problems. This paper advances a rival, positivist-friendly account of legal statements which we call “quasi-expressivist”, explicitly modeled after Finlay’s metaethical theory of moral statements. This consists in a (...) descriptivist, “rule-relational” semantics combined with a pragmatic account of the expressive and practical functions of legal discourse. We argue that this approach is at least as well-equipped as expressivism to explain the motivational and prescriptive features of “internal” legal statements, as well as a fundamental kind of legal disagreement, while being better positioned to account for various “external” uses of the same language. We develop this theory in a Hartian framework, and in the final part of the paper argue (particularly against Toh’s expressivist interpretation) that Hart’s own views in The Concept of Law are best reconstructed along such quasi-expressivist lines. (shrink)

In previous work, we have developed the idea that, in some disputes, speakers appear to use (rather than mention) a term in order to put forward views about how that term should be used. We call such disputes “metalinguistic negotiations”. Herman Cappelen objects that our model of metalinguistic negotiation makes implausible predictions about what speakers really care about, and what kinds of issues they would take to settle their disputes. We highlight a distinction (which we have emphasized in prior work) (...) between the question of which disagreements speakers have vs. which disagreements are immediately expressed in a given linguistic exchange. Once this distinction is clear, we can appreciate that speakers who are engaged in a metalinguistic negotiation (where certain issues in conceptual ethics are immediately expressed) can also disagree about other issues, including both other issues in conceptual ethics and “object-level” issues that aren’t about words or concepts. In many metalinguistic negotiations, speakers (we think correctly) care more about these other issues than they do about ones concerning the meaning of a word. Because of this, Cappelen’s objection fails to identify any data that challenge our model. (shrink)

One of the central debates in legal philosophy is the debate over legal positivism. Roughly, positivists say that law is ultimately grounded in social facts alone, whereas antipositivists say it is ultimately grounded in both social facts and moral facts. In this paper, I argue that philosophers involved in the dispute over legal positivism sometimes employ distinct concepts when they use the term “law” and pick out different things in the world using these concepts. Because of this, what positivists say (...) might well then be true of one thing (e.g., law1) but false of another (e.g., law2). Accepting this thesis does not mean that the philosophers engaged in this dispute are “talking past each other” or engaged in a “merely verbal dispute” that lacks substance. I argue that participants in this dispute are sometimes arguing about what they should mean by the word “law” in the context at hand. This involves putting forward competing proposals about which concept the word “law” should be used to express. This is an issue in what I call “conceptual ethics.” This argument in conceptual ethics can be well worth having, given the connotations that the term “law” plays in many contexts, ranging from legal argument to political philosophy to social-scientific inquiry. Sometimes, I claim, philosophers (and ordinary speakers) engage in such argument tacitly by competing “metalinguistic” usages of the term “law”—usages of the term that express a view (in this case, a normative view) about the meaning of the word itself. In such cases, speakers on different sides of the positivism debate might in fact both speak truly, in terms of the literal (semantic) content of what they both say. Nonetheless, they may disagree in virtue of views in conceptual ethics about “law” that they express through the nonliteral content of what they say. These views in conceptual ethics often reflect further disagreements about issues that are not ultimately about words or concepts. These include foundational ones in ethics and politics about how we should live and what kind of institutions should govern our lives. My metalinguistic account of the dispute over legal positivism better equips us to identify what such issues are and to engage them more fruitfully. (shrink)

In Choosing Normative Concepts, Eklund considers a “variance thesis” about our most fundamental (and seemingly most “authoritative”) normative concepts. This thesis raises the threat of an alarming symmetry between different sets of normative concepts. If this symmetry holds, it would be incompatible with “ardent realism” about normativity. Eklund argues that the ardent realist should appeal to the idea of “referential normativity” in response to this challenge. I argue that, even if Eklund is right in his core arguments on this front, (...) many other important challenges for ardent realism remain that also stem from the issues about possible variance in normative concepts that he considers. Following this, I introduce further issues about conceptual variance. These are issues that arise within the context of the framework that Eklund proposes the ardent realist use to confront the variance theses he considers. In particular, the issues concern what normative role as such is, as well as, relatedly, which roles associated with a concept (or predicate) get to count as part of its normative role. The upshot is that issues about conceptual variance in normative domains might be even more challenging for the ardent realist to deal with than Eklund argues. (shrink)

One of Ronald Dworkin's most distinctive claims in legal philosophy is that law is an interpretative concept, a special kind of concept whose correct application depends neither on fixed criteria nor on an instance-identifying decision procedure but rather on the normative or evaluative facts that best justify the total set of practices in which that concept is used. The main argument that Dworkin gives for interpretivism about some conceptis a disagreement-based argument. We argue here that Dworkin's disagreement-based argument relies on (...) a mistaken premise about the nature of disagreement. We propose an alternative analysis of the type of disputeseeming variation casesthat Dworkin uses to motivate the idea of interpretative concepts. We begin by observing that genuine disagreements can be expressed via a range of linguistic mechanisms, many of which do not require that speakers literally assert and deny one and the same proposition. We focus in particular on what we call disputes in which speakers do not express the same concepts by their words but rather negotiate how words should be used and thereby negotiate which of a range of competing concepts should be used in that context. We claim that this view has quite general theoretical advantages over Dworkin's interpretivism about seeming variation cases and about the relevant class of legal disputes in particular. This paper thus has two interlocking goals: (1) to undermine one of Dworkin's core arguments for interpretivism, and (2) to provide the foundations for a noninterpretivist alternative account of an important class of legal disputes. (shrink)

In “How Facts Make Law” and other recent work, Mark Greenberg argues that legal positivists cannot develop a viable constitutive account of law that meets what he calls the “the rational-relation requirement.” He argues that this gives us reason to reject positivism in favor of antipositivism. In this paper, I argue that Greenberg is wrong: positivists can in fact develop a viable constitutive account of law that meets the rational-relation requirement. I make this argument in two stages. First, I offer (...) an account of the rational-relation requirement. Second, I put forward a viable positivist account of law that I argue meets this requirement. The account that I propose is a version of Scott Shapiro’s Planning Theory of Law. The version of Shapiro’s account that I propose combines (1) the account of concepts and conceptual analysis put forward by David Chalmers and Frank Jackson with (2) the account of the concept LEGAL INSTITUTION (and its conceptual connections to the concept LEGAL NORM) that we get from a certain reading of Shapiro’s Planning Theory. In addition to providing a compelling response to Greenberg’s argument in “How Facts Make Law,” I argue that the explanation for why my response to Greenberg works underscores one of the central problems facing legal antipositivism: namely, its lack of a convincing account of the nature of legal institutions. (shrink)

Morality seems important, in the sense that there are practical reasons — at least for most of us, most of the time — to be moral. A central theoretical motivation for consequentialism is that it appears clear that there are practical reasons to promote good outcomes, but mysterious why we should care about non-consequentialist moral considerations or how they could be genuine reasons to act. In this paper we argue that this theoretical motivation is mistaken, and that because many arguments (...) for consequentialism rely upon it, the mistake substantially weakens the overall case for consequentialism. We argue that there is indeed a theoretical connection between good states and reasons to act, because good states are those it is fitting to desire and there is a conceptual connection between the fittingness of a motive and reasons to perform the acts it motivates. But while some of our motives are directed at states, others are directed at acts themselves. We contend that just as the fittingness of desires for states generates reasons to promote the good, the fittingness of these act-directed motives generates reasons to do other things. Moreover, we argue that an act’s moral status consists in the fittingness of act-directed feelings of obligation to perform or avoid performing it, so the connection between fitting motives and reasons to act explains reasons to be moral whether or not morality directs us to promote the good. This, we contend, de-mystifies how there could be non-consequentialist reasons that are both moral and practical. (shrink)

ABSTRACT In Choosing Normative Concepts, Eklund considers a “variance thesis” about our most fundamental normative concepts. This thesis raises the threat of an alarming symmetry between different sets of normative concepts. If this symmetry holds, it would be incompatible with “ardent realism” about normativity. Eklund argues that the ardent realist should appeal to the idea of “referential normativity” in response to this challenge. I argue that, even if Eklund is right in his core arguments on this front, many other important (...) challenges for ardent realism remain that also stem from the issues about possible variance in normative concepts that he considers. Following this, I introduce further issues about conceptual variance. These are issues that arise within the context of the framework that Eklund proposes the ardent realist use to confront the variance theses he considers. In particular, the issues concern what normative role as such is, as well as, relatedly, which roles associated with a concept get to count as part of its normative role. The upshot is that issues about conceptual variance in normative domains might be even more challenging for the ardent realist to deal with than Eklund argues. (shrink)

In recent years, there has been growing discussion amongst philosophers about “conceptual engineering”. Put roughly, conceptual engineering concerns the assessment and improvement of concepts, or of other devices we use in thought and talk (e.g., words). This often involves attempts to modify our existing concepts (or other representational devices), and/or our practices of using them. This paper explores the relation between conceptual engineering and conceptual ethics, where conceptual ethics is taken to encompass normative and evaluative questions about concepts, words, and (...) other broadly “representational” and/or “inferential” devices we use in thought and talk. We take some of the central questions in conceptual ethics to concern which concepts we should use and what words should mean, and why. We put forward a view of conceptual engineering in terms of the following three activities: conceptual ethics, conceptual innovation, and conceptual implementation. On our view, conceptual engineering can be defined in terms of these three activities, but not in a straightforward, Boolean way. Conceptual engineering, we argue, is made up of mereologically complex activities whose parts fall into the categories associated with each of these three different activities. (shrink)

As a strategy for exploring the relationship between understanding and knowledge, we consider whether epistemic luck – which is typically thought to undermine knowledge – undermines understanding. Questions about the etiology of understanding have also been at the heart of recent theoretical debates within epistemology. Kvanvig (2003) put forward the argument that there could be lucky understanding and produced an example that he deemed persuasive. Grimm (2006) responded with a case that, he argued, demonstrated that there could not be lucky (...) understanding. In this paper, we empirically examine how participants' patterns of understanding attributions line up with the predictions of Kvanvig and Grimm. We argue that the data challenge Kvanvig's position. People do not differentiate between knowing-why and understanding-why on the basis of proper etiology: attributions of knowledge and understanding involve comparable (and minimal) roles for epistemic luck. We thus posit that folk knowledge and understanding are etiologically symmetrical. (shrink)

The acquisition of English noun and verb morphology is modeled using a single-system connectionist network. The network is trained to produce the plurals and past tense forms of a large corpus of monosyllabic English nouns and verbs. The developmental trajectory of network performance is analyzed in detail and is shown to mimic a number of important features of the acquisition of English noun and verb morphology in young children. These include an initial error-free period of performance on both nouns and (...) verbs followed by a period of intermittent over-regularization of irregular nouns and verbs. Errors in the model show evidence of phonological conditioning and frequency effects. Furthermore, the network demonstrates a strong tendency to regularize denominal verbs and deverbal nouns and masters the principles of voicing assimilation. Despite their incorporation into a single-system network, nouns and verbs exhibit some important differences in their profiles of acquisition. Most importantly, noun inflections are acquired earlier than verb inflections. The simulations generate several empirical predictions that can be used to evaluate further the suitability of this type of cognitive architecture in the domain of inflectional morphology. (shrink)

In both co-authored and solo-authored work over the past decade, we have developed the idea of “metalinguistic negotiation”. On our view, metalinguistic negotiation is a type of dispute in which speakers appear to use (rather than explicitly mention) a term in conflicting ways to put forward views about how that very term should be used. In this paper, we explore four possible dimensions of variation among metalinguistic negotiations, and the interactions among those dimensions. These types of variation matter for understanding (...) the nature, and the potential range, of the phenomenon of metalinguistic negotiation. As an illustration of the latter, we argue in our concluding section that understanding the full range of forms that metalinguistic negotiations can take has implications for debates about the “implementation” of conceptual engineering proposals. (shrink)

According to Scott Shapiro’s Moral Aim Thesis, it is an essential feature of the law that it has a moral aim. In short, for Shapiro, this means that the law has the constitutive aim of providing morally good solutions to morally significant social problems in cases where other, less formal ways of guiding the activity of agents won’t work. In this article, I argue that legal positivists should reject the Moral Aim Thesis. In short, I argue that although there are (...) versions of the Moral Aim Thesis that are arguably compatible with legal positivism, all of the different ways of making it compatible face serious philosophical difficulties. Following a discussion of what these difficulties are, I provide an alternative to the Moral Aim Thesis, a thesis that I call the ‘Represented-as-Moral Thesis’. This thesis avoids the problems that I raise for the Moral Aim Thesis and better resonates with some of the core intuitions behind legal positivism. Furthermore, a version of Shapiro’s Planning Theory of Law that is developed with the Represented-as-Moral Thesis (as opposed to the Moral Aim Thesis) can explain all of the things that Shapiro uses the Moral Aim Thesis to explain. (shrink)

It is widely recognized that conceptual and theoretical innovations and the employment of new instruments and experimental techniques are important factors in explaining the growth of scientific knowledge in chemistry. This study examines another dimension of research in chemistry, collaboration and co-authorship. I focus specifically on Theodore Richards’ career and publications. During the period in which Richards worked, co-authorship was beginning to become more common than it had been previously. Richards was the first American chemist to be awarded a Nobel (...) Prize and he was at the forefront in this new trend in chemistry. He collaborated more than was typical for his time, with many scientists, in different sized groups, and he often had persistent collaborative relationships, extending over a number of years. Further, it appears that these collaborations benefited Richards, his collaborators, and the field of chemistry as a whole. (shrink)

Which concepts should we use to think and talk about the world, and to do all of the other things that mental and linguistic representation facilitates? This is the guiding question of the field that we call ‘conceptual ethics’. Conceptual ethics is not often discussed as its own systematic branch of normative theory. A case can nevertheless be made that the field is already quite active, with contributions coming in from areas as diverse as fundamental metaphysics and social/political philosophy. In (...) this pair of papers, we try to unify the field, reflecting on its basic nature, structure, and methodology. (shrink)

One important trend in political philosophy is to hold that non-human animals don't directly place demands of justice on us. Another important trend is to give considerations of justice normative priority in our general normative theorising about social/political institutions. This situation is problematic, given the actual ethical standing of non-human animals. Either we need a theory of justice that gives facts about non-human animals a non-derivative explanatory role in the determination of facts about what justice involves, or else we should (...) be wary of the default normative priority that considerations of justice have in much of contemporary political philosophy. This discussion brings out important general methodological points tied to the role of concept and word choice in normative theorising about our social/political institutions. These methodological points, I argue, matter for a range of discussions in contemporary political philosophy, including those about global justice. (shrink)

We explore an underappreciated tension at the heart of the debate over legal positivism. On the one hand, many legal philosophers aspire for the debate to tell us what law is, and the nature of law. But on the other hand, the positions in the debate are generally formulated such that they’re about something else: what law is necessarily connected to or dependent on. This is a genuine tension, because theses about what law is necessarily connected to or dependent on (...) do not by themselves state or automatically settle what law is or the nature of law. This tension prompts us to propose a new approach to formulating positivism and antipositivism as theses about the real definition of law. Our proposal is simple, but fruitful. We argue that it better insulates and unifies the debate: that is, it prevents orthogonal theses from trivially vindicating or falsifying positivism and antipositivism, and it explains how different threads of the existing debate contribute to a single topic. We close by briefly considering two recent arguments about exclusive positivism, to illustrate how our discussion bears on contemporary jurisprudential debates. (shrink)

It is not an exaggeration to say that Allan Gibbard is one of the most significant contributors to philosophy over the last five decades. Gibbard's work covers an impressive number of subfields within philosophy, including ethics, philosophy of language, decision theory, epistemology, and metaphysics. It also engages with, and makes significant contributions to, work from the natural and social sciences. This volume is not a collection of artifacts from past decades of philosophy. Instead, it is a collection of essays that (...) each make a significant contribution to contemporary work in philosophy. This reflects the fact that Gibbard's work has not only had a massive influence on past discussion in philosophy but also continues to influence new directions of philosophical research. With contributions from: Sara Aronowitz, Simon Blackburn, Paul Boghossian, David Braddon-Mitchell, Nate Charlow, Stephen Darwall, Jamie Dreier, Billy Dunaway, Melissa Fusco, Sona Ghosh, Allan Gibbard, Bill Harper, Paul Horwich, Zoë Johnson King, Tristram McPherson, Howard Nye, Lauren Olin, Caleb Perl, David Plunkett, Peter Railton, Connie Rosati, Mark Schroeder, Alex Silk, Daniel J. Singer, Brian Skyrms, and Seth Yalcin. (shrink)