The acquisition and evolution of speech production, discourse and communication can be negatively impacted by brain malformations. We describe, for the first time, a case of developmental dynamic dysphasia (DDD) in a right-handed adolescent boy (subject D) with cortical malformations involving language-eloquent regions (inferior frontal gyrus) in both the left and the right hemispheres. Language evaluation revealed a markedly reduced verbal output affecting phonemic and semantic fluency, phrase and sentence generation and verbal communication in everyday life. Auditory comprehension, repetition, naming, (...) reading and spelling were relatively preserved, but executive function was impaired. Multimodal neuroimaging showed a malformed cerebral cortex with atypical configuration and placement of white matter tracts bilaterally and abnormal callosal fibers. Dichotic listening showed right hemisphere dominance for language and functional magnetic resonance imaging (fMRI) additionally revealed dissociated hemispheric language representation with right frontal activation for phonology and bilateral dominance for semantic processing. Moreover, subject D also had congenital mirror movements (CMM), defined as involuntary movements of one side of the body that mirror intentional movements of the other side. Transcranial magnetic stimulation and fMRI during voluntary unimanual (left and right) hand movements showed bilateral motor cortex recruitment and tractography revealed a lack of decussation of bilateral corticospinal tracts. Genetic testing aimed to detect mutations that disrupt the development of commissural tracts correlating with CMM (e.g., Germline DCC mutations) was negative. Overall, our findings suggest that DDD in subject D resulted from the underdevelopment of the left inferior frontal gyrus with limited capacity for plastic reorganization by its homologous counterpart in the right hemisphere. Corpus callosum anomalies probably contributed to hinder interhemispheric connectivity necessary to compensate language and communication deficits after left frontal involvement. (shrink)

The World Health Organization has declared a world pandemic due to COVID-19. In response, most affected countries have enacted measures involving compulsory confinement and restrictions on free movement, which likely influence citizens' lifestyles. This study investigates changes in health risk behaviors with duration of confinement. An online cross-sectional survey served to collect data about the Spanish adult population regarding health behaviors during the first 3 weeks of confinement. A large sample of participants from all Spanish regions completed the survey. Binomial (...) logistic regressions adjusted for socioeconomic characteristics, body mass index, previous HRBs, and confinement context were conducted to investigate associations between the number of weeks confined and a set of six HRBs. When adjusted, we observed significantly lower odds of experiencing a higher number of HRBs than before confinement overall in a time-dependent fashion: OR 0.63; 95% CI: 0.49–0.81 for the second and OR 0.47; 95% CI: 0.36–0.61 for the third week of confinement. These results were equally consistent in all age and gender subgroup analyses. The present study indicates that changes toward a higher number of HRBs than before confinement, as well as the prevalence of each HRB except screen exposure, decreased during the first 3 weeks of COVID-19 confinement, and thus the Spanish adult population may have adapted to the new situational context by gradually improving their health behaviors. (shrink)

Résumé : Les domaines de la philosophie et de la théorie politique ont connu un certain nombre de changements au cours des quarante dernières années. L'un attire notre attention tout particulièrement ; le basculement d'un point de vue national, cristallisé par le contrat social rawlsien, vers un point de vue non-national. En effet, plusieurs penseurs abordent un ensemble de phénomènes considérés comme nouveaux, tels que les traités de libre commerce et l'économie globale, les entreprises et les institutions supra et transnationales, (...) l'immigration et les contrôles frontaliers etc. Ces changements sont intéressants puisqu'ils obéissent, principalement, à une évolution majeure du terrain politique et social que l'on appelle mondialisation. Les théoriciens travaillant dans le domaine de la justice globale semblent s'adresser à deux questions différentes mais reliées. La première concerne la justice globale : dans quelle mesure et pourquoi l'ordre mondial est-il juste ou injuste ? Qu'est-ce qu'un ordre global juste ? La deuxième est dans un sens corollaire à la première, et concerne la responsabilité : qui devrait être blâmé ou digne d'éloge pour l'ordre mondial ? Est-ce que les citoyens sont responsables de l'ordre mondial ? Qui devrait redresser ses éventuelles conséquences injustes ? Face à l'économie mondialisée et aux institutions politiques et économiques internationales et trans-nationales, cette interrogation devient légitime et nécessaire : suis-je responsable à l'égard des travailleurs des sweat shop lorsque j'achète des habits à Auchan ou bien à l'égard des caféiculteurs très mal payés lorsque je prends un capuccino dans un café Starbucks ? Est-ce que les citoyens sont responsables des traités de libre commerce que leurs gouvernements signent ? Ces questions sur la responsabilité des individus dans le contexte de la mondialisation seront l'enjeu de ce travail de recherche. Nous interrogerons plus exactement la responsabilité d'un agent lorsqu'il fait partie d'un chaîne causale complexe, lorsqu'il participe d'une injustice structurelle. Ainsi, il ne s'agit pas seulement d'une chaîne causale, mais de connexions qui sont l'issue d'un changement des modes de productions, de consommation et de la concurrence dans un marché mondialisé. Plus important encore, il ne s'agit pas simplement de la responsabilité individuelle mais plutôt de la responsabilité individuelle en tant que citoyen, et donc d'une responsabilité politique. Elle peut certes être individuelle, mais nous devons tenir compte du fait qu'elle doit être pensée en tant que responsabilité politique, et pas uniquement morale, puisque l'individu et ses actions sont déterminés par des communautés politiques dans lesquelles il participe, ou dans lesquelles il est représenté. Ainsi, la mondialisation nous invite à repenser la responsabilité individuelle pour pouvoir rendre compte des intuitions morales et politiques qui guident une bonne partie du champ de la justice globale. Pour cela, nous verrons dans un premier temps la manière dont les théories de la justice globale essaient de répondre à ce défit. Grâce à cela nous dégagerons l'hypothèse qui nous guidera, l'idée que dans la mondialisation, un agent peut être responsable, avec d'autres, des raisons pour lesquelles il n'est pas considéré comme responsable. C'est-à-dire qu'il sera méta-responsable. Dans un second temps, nous essaierons de déterminer un model de responsabilité individuelle, et de comprendre comment la responsabilité est attribuée. Ensuite, nous essaierons de formuler une manière de concevoir la responsabilité politique. Grâce à ces deux éléments, la responsabilité individuelle et la responsabilité politique, nous pourrons parvenir à formuler une conception de la méta-responsabilité comme forme de penser l'agentivité traversée par la mondialisation. (shrink)

En este trabajo se define formamente el concepto de representacion en química utilizando homomorfismos desde estructuras algebraicas, que llamamos sistemas de tipo C, en otras estructuras especiales de símbolos muy relacionados con los que son habituales en la qímica experimental. Para la definicion de los sistemas de tipo C se ha seleccionado un conjunto minimo de relaciones y funciones, que son necesarias para expresar proposiciones significativas en química. Tambien se define un lenguaje formal de primer orden adecuado a los sistemas (...) de tipo C, que llamamos L. EI resultado principal que se demuestra es que toda representación que verifica las mismas sentencias de L que un sistema de tipo C, es necesariamente isomorfo a él. Se concluye por lo tanto que puede existir un problema linguístico subyacente en la aplicacion que de la mecaníca cuántica se hace en la química teórica.The concept of representation in chemistry bas been formallv defined by means of homomorphisms from algebraical structures, which we call type-C systems, to some special sets of symbols which can be related to the symbols ordinarily used in experimental chemistry. A minimum number of relations and functions, which would suffice to express significant propositions in chemistry, have been chosen to define type-C systems. A first order formal language L adequate to type-C systems has been defined. It has been shown that each representation that verifies the same sentences of L as a type-C system is necessarily isomorphic to it. It is concluded that a systematic study of the representation problem in chemistry is in order because a deep language problem underlies the application of quantum mechanies to chemical problems. (shrink)

En este trabajo se define formamente el concepto de representacion en química utilizando homomorfismos desde estructuras algebraicas, que llamamos sistemas de tipo C, en otras estructuras especiales de símbolos muy relacionados con los que son habituales en la qímica experimental. Para la definicion de los sistemas de tipo C se ha seleccionado un conjunto minimo de relaciones y funciones, que son necesarias para expresar proposiciones significativas en química. Tambien se define un lenguaje formal de primer orden adecuado a los sistemas (...) de tipo C, que llamamos L(C). EI resultado principal que se demuestra es que toda representación que verifica las mismas sentencias de L(C) que un sistema de tipo C, es necesariamente isomorfo a él. Se concluye por lo tanto que puede existir un problema linguístico subyacente en la aplicacion que de la mecaníca cuántica se hace en la química teórica.The concept of representation in chemistry bas been formallv defined by means of homomorphisms from algebraical structures, which we call type-C systems, to some special sets of symbols which can be related to the symbols ordinarily used in experimental chemistry. A minimum number of relations and functions, which would suffice to express significant propositions in chemistry, have been chosen to define type-C systems. A first order formal language L(C) adequate to type-C systems has been defined. It has been shown that each representation that verifies the same sentences of L(C) as a type-C system is necessarily isomorphic to it. It is concluded that a systematic study of the representation problem in chemistry is in order because a deep language problem underlies the application of quantum mechanies to chemical problems. (shrink)

En un momento de tensión y polémica por la situación que tiene la enseñanza de la filosofía dentro de la l. o. g. s. e., es útil hacer una reflexión comparativa con el modo en el que se esta dando respuesta a la didáctica de la filosofía en otro país europeo, en Italia.

Tras delinear los intereses y líneas básicas del pensamiento de Aranguren, se consideran sus reflexiones sobre el tema de la muerte, principalmente en su Ética de 1958, pero también en artículos y obras posteriores.

La Révolte des masses de José Ortega y Gasset est l’un des diagnostics les plus lucides de la crise morale européenne. Cette crise est la conséquence de l’apparition d’un nouveau genre humain : l’homme-masse révolté. La révolte annoncée a été une victoire, mais ce triomphe signe aussi son échec. La solution de la crise ne peut provenir que d’une réforme radicale de la philosophie, qui dépasserait le subjectivisme et le relativisme auxquels nous a conduits l’évolution égarée de la modernité. (...) L’essai d’Ortega y Gasset est d’une actualité remarquable qui permet de comprendre la situation spirituelle de notre époque. (shrink)

Reliabilist accounts of knowledge are widely seen as having the resources for blocking sceptical arguments, since these arguments appear to rely on assumptions about the nature of knowledge that are rendered illegitimate by reliabilist accounts. The goal of this book is to assess the main arguments against the possibility of knowledge, and its conclusions challenge this consensus. The book articulates and defends a theory of knowledge that belongs firmly in the truth-tracking tradition, and argues that although the theory has the (...) resources for blocking the main standard lines of sceptical reasoning, there is a sceptical argument against which the theory offers no defence, as it doesn’t rely on any assumptions that the theory would render illegitimate. The book ends with the suggestion that the problem might have a metaphysical solution—that although the sceptical argument may make no illegitimate epistemological assumptions, it does rest on a questionable account of the nature of cognition. (shrink)

Propaganda has been historically used for the benefit of certain social groups faced up to another. This propaganda is not always ethical at all. It is based on misconceptions, lies, and fallacies. We have analyzed (by using an experimental Psychology task) the presence and cognitive weight of certain mental footnotes and their influence on the Reasoning of Hispanic-Americans (Ecuadorian). These mental footnotes have been extracted from the classical work “A brief account of the destruction of the Indies” of Bartolomé de (...) las Casas in 1552. The most relevant and significant finding of this study is the clear evidence that nowadays we can still find these historical falsehoods in the current cognitive system of Ecuadorian people which are product of a well-planned and maliciously orchestrated propaganda. We conclude that all the contents of the Spanish black legend are the consequences of the aspirations of some social sectors to boycott the Spanish culture. (shrink)

The paper deals with a version of the principle that a belief source can be a knowledge source only if the subject knows that it is reliable. I argue that the principle can be saved from the main objections that motivate its widespread rejection: the claim that it leads to skepticism, the claim that it forces us to accept counterintuitive knowledge ascriptions and the claim that it is incompatible with reliabilist accounts of knowledge. I argue that naturalist epistemologists should reject (...) these claims. I introduce my treatment of the principle by considering the analogous situation posed by the closure principle. (shrink)

I discuss the account of logical consequence advanced in Wittgenstein's Tractatus. I argue that the role that elementary propositions are meant to play in this account can be used to explain two remarkable features that Wittgenstein ascribes to them: that they are logically independent from one another and that their components refer to simple objects. I end with a proposal as to how to understand Wittgenstein's claim that all propositions can be analysed as truth functions of elementary propositions.

The current times call for reforms in educational processes. The Covid-19 pandemic had an unforeseen impact on the educational system in all countries. This need for change requires new pedagogies and new methods for teaching and learning. Understanding the need for change is essential for the formulation of adaptive proposals, as well as for the generation of training activities to complement the teaching curriculum. New educational practices lead to a vision of educational quality, with new approaches that allow the continuous (...) integration of knowledge and permanent interaction with the student. This paper presents an analysis of the new teaching methodologies in times of confinement due to the pandemic caused by Covid-19. Keywords: Teaching methodologies, educational system, learning process. References [1]É. Tremblay-Wragg, C. Raby, L. Ménard y I. Plante, «El uso de estrategias didácticas diversificadas por cuatro profesores universitarios: ¿qué contribución a la motivación de aprendizaje de sus alumnos?,» Docencia en educación superior, vol. 26, nº 21, 2021. [2]L. Czerniewicz, R. Mogliacci, S. Walji, A. Cliff, B. Swinnerton y N. Morris, «Enseñanza y aprendizaje académico en el nexo: desagregación, mercantilización y digitalización en la educación superior,» Teaching in Higher Education, vol. 26, nº 2021, p. 16, 2021. [3]S. Dogan y A. Adam, «Aumentar el efecto del desarrollo profesional en la instrucción efectiva a través de comunidades profesionales,» Docentes y docencia: teoría y práctica, vol. 26, nº 3-4, pp. 326-349, 2020. [4]I. M. Torres Salas, «La enseñanza tradicional de las ciencias versus las nuevas tendencias educativas,» Educare, vol. 14, nº 1, pp. 131-142, 2010. [5]B. Fabio, J. Antonio Palomino y J. González Henríquez, «Evaluación y contraste de los métodos de enseñanza tradicional y lúdico,» Revista de Educación física y deportes, vol. 13, nº 94, pp. 29-36, 2008. [6]Y. Benítez y C. Mora, «Enseñanza tradicional vs aprendizaje activo,» Revista Cubana de Física, vol. 27, nº 2A, pp. 175-179, 2010. [7]P. Morales Bueno y V. Landa Fitzgerald, «Aprendizaje basado en problemas,» Theoria, vol. 13, nº 1, pp. 145-157, 2004. [8]R. Gil-Galván, I. Martín-Espinosa y F. Gil-Galván, «University student perceptions of competences acquired through problem-based learning,» Educación XXI, vol. 24, nº 1, pp. 271-295, 2020. [9]E. Ortiz Cermeño, «El aprendizaje basado en problemas,» Perfiles Educativos, vol. 41, nº 164, pp. 208-213, 2019. [10]E. Araos-Baeriswyl, C. Moll-Manzur, Á. Paredes y J. Landeros, «Aprendizaje invertido: un enfoque pedagógico en tiempos de pandemia,» Rev. Atención Primaria, vol. 53, nº 1, p. 117, 2021. [11]V. León-Carrascosa, M. Belando-Montoro y S. Sánchez-Serrano, «Design and validation of a questionnaire to evaluate the service-learning methodology,» Rev.Estudios sobre educación, vol. 39, nº 1, pp. 247-266, 2020. [12]J. Collado-Ruano, M. Ojeda, M. Malo y D. Amino, «Educación, arte e interculturalidad: El cine documental como lenguaje comunicativo y tecnología innovadora para el aprendizaje de la metodología I + D + I,» Rev. Texto livre, vol. 13, nº 3, pp. 376-393, 2020. [13]P. M. Bueno y V. Landa Fitzgerald, «Aprendizaje basado en problemas,» Theoria, vol. 13, nº 1, pp. 145-157, 2004. [14]J. A. Martí, M. Heydrich, M. Rojas y A. Hernández, «Aprendizaje basado en proyectos: Una experiencia de innovación docente,» Universidad EAFIT, vol. 46, nº 158, pp. 11-21, 2010. [15]L. Rojas y N. M. Jaimes, «Canvas LMS y el trabajo colaborativo como metodología de aprendizaje en entornos virtuales,» de Congreso Ibérico de Sistemas y Tecnologías de la Información, CISTI, Bogotá, Colombia, 2020. [16]B. Bordel y P. Mareca, «Results and Trends in educational MOOCs in the engineering area with MIRIADAX platform. A case study,» de 15th Iberian Conference on Information Systems and Technologies, CISTI 2020; Seville; Sevilla, España, 2020. [17]K. Vermeir y G. Kelchtermans, «Innovative practice as interpretative negotiation.A case-study on the kamishibai in Kindergarten.,» Teachers and Teaching: Theory and Practice, vol. 26, nº 3-4, pp. 248-263, 2020. [18]B. Tucker, «The Flipped Classroom: Online instruction at home frees class time for learning,» Education Next, vol. 1, nº 1, pp. 82-84, 2012. [19]M. V. Ledo, N. R. Michelena, N. N. Cao, I. d. R. M. Suárez y M. N. Vialart Vidal, « Aula invertida, nueva estrategia didáctica,» Educación Médica Superior, vol. 30, nº 3, pp. 678-688, 2016. [20]Metodologías activas por medio de las TIC, [Online]. Available: https://www.campuseducacion.com/blog/recursos/articulos-campuseducacion metodologias-activas-por-medio-de-las-tic/?cn-reloaded=1. [Last access: February 14, 2021]. (shrink)

To the sceptic's contention that I don't know that I have hands because I don't know that there is an external world, the Moorean replies that I know that there is an external world because I know that I have hands. Crispin Wright has argued that the Moorean move is illegitimate, and has tried to block it by limiting the applicability of the principle of the transmission of knowledge by inference—the principle that recognising the validity of an inference from known (...) premises generates knowledge of the conclusion. I argue that, in the presence of some plausible assumptions, blocking the Moorean move does not require limiting the applicability of the transmission principle. Then I argue against Jim Pryor's contention that the Moorean argument transmits evidential support from its premises to its conclusion. (shrink)

The paper argues against Sosa’s claim that sensitivity cannot be differentially supported over safety as the right requirement for knowledge. Its main contention is that, although all sensitive beliefs that should be counted as knowledge are also safe, some insensitive true beliefs that shouldn’t be counted as knowledge are nevertheless safe.

Many interpreters of the Tractatus accept that the book endorses an argument for simples based on the reflection that, since complexes exist only contingently, if names referred to complexes the propositions in which they figure would lack sense if their referents went out of existence. More specifically, most interpreters read 2.0211-2.0212 as putting forward this argument. My main goal in this paper is to attack this reading and to put forward an alternative. I argue that there is no good reason (...) for thinking that the Tractatus advances this argument. I argue that 2.0211-2, in particular, should not be read in this way, and put forward an alternative reading of the passage. (shrink)

The paper develops an account of semantic notions which occupies a middle ground between antirealism and traditional forms of realism, using some ideas from the work of John McDowell. The position is based on a contrast between two points of view from which we might attempt to characterize our linguistic practices from the cosmic exile s point of view and from the midst of language as a going concern. The contrast is drawn in terms of whether our characterization of our (...) linguistic practices is taken to result from engagement in the very same practices that we are trying to characterize. The position takes realism to be correct when understood as an account from the internal perspective, but incorrect when taken as an account from the external perspective. However, the intelligibility of the question as to what our practices would look like from the cosmic exile s point of view is presented as problematic. (shrink)

ABSTRACT I argue that some of the central doctrines of Wittgenstein's Tractatus Logico-Philosophicus can be seen as addressing the twin problems of semantic unity and...

This volume comprises nine lively and insightful essays by leading scholars on the philosophy of Ludwig Wittgenstein, focusing mainly on his early work.

An account of predicate reference is presented which attempts to steer a middle course between reductionism, which construes the notion in terms of speakers' inclinations, and {transcendent) realism, which construes the notion in terms of properties. It is first introduced in the context of a discussion of the accounts of length (distance) advanced by Hans Reichenbach, Adolf Grünbaum and Hilary Putnam. A general account of predicate reference is then developed that explains the notion in terms of speakers' inclinations, while rejecting (...) the idea that this explanation should take the form of a reduction. The view is presented as a vindication of extreme nominalism, as it explains predicate reference solely in terms of the notion of qualia introduced by C.I. Lewis and developed by Nelson Goodman, which, it is argued, is definable in terms of speakers' classificatory propensities. Some connections are explored between the position that is presented and the views of Michael Dummett, John McDowell, Mark Johnston and Hilary Putnam, among others. (shrink)

The paper deals with Hilary Putnam's model-theoretic argument against metaphysical realism. It considers the objections to the argument raised by David Lewis, Mark Heller, James van Cleve, Anthony Brueckner and others, to the effect that Putnam's reasoning fails to undermine versions of metaphysical realism which construe reference along externalist lines. I argue that the version of Putnam's argument that his critics have attacked is indeed powerless against externalist accounts of reference, but that, on a different construal, the argument puts genuine (...) pressure on externalism. On the version of the argument that I develop, the thrust of the model-theoretic considerations is that an externalist construal of reference would make grasp of reference facts impossible. (shrink)

In Wittgenstein on Rules and Private Language, Saul Kripke rejects some of the most popular accounts of what meaning facts consist in on the grounds that they fail to accommodate the normative character of meaning. I argue that a widespread interpretation of Kripke's argument is incorrect. I contend that the argument does not rest on the contrast between descriptive and normative facts, but on the thought that speakers' uses of linguistic expressions have to be justified. I suggest that the line (...) of reasoning that I attribute to Kripke can be seen as putting pressure on the idea that predicate satisfaction is to be explained in terms of a relation between predicates and properties. (shrink)

The subject matter of this paper is the view that it is correct, in an absolute sense, to believe a proposition just in case the proposition is true. I take issue with arguments in support of this view put forward by Nishi Shah and David Velleman.

I take issue with Robert Brandom’s claim that on an analysis of knowledge based on objective probabilities it is not possible to provide a stable answer to the question whether a belief has the status of knowledge. I argue that the version of the problem of generality developed by Brandom doesn’t undermine a truth-tracking account of noninferential knowledge that construes truth-tacking in terms of conditional probabilities. I then consider Sherrilyn Roush’s claim that an account of knowledge based on probabilistic tracking (...) faces a version of the problem of generality. I argue that the problems she raises are specific to her account, and do not affect the version of the view that I have advanced. I then consider Brandom’s argument that the cases that motivate reliabilist epistemologies are in principle exceptional. I argue that he has failed to make a cogent case for this claim. I close with the suggestion that the representationalist approach to knowledge that I endorse and Brandom rejects is in principle compatible with the kind of pragmatist approach to belief and truth that both Brandom and I endorse. (shrink)

In the recent literature on confirmation there are two leading approaches to the provision of a probabilistic measure of the degree to which a hypothesis is confirmed by evidence. The first is to construe the degree to which evidence E confirms hypothesis H as a function that is directly proportional to p and inversely proportional to p . I shall refer to this as the probability approach. The second approach construes the notion as a function that is directly proportional to (...) the true-positive rate – the probability of the evidence if the hypothesis is true, p – and inversely proportional to the false-positive rate – the probability of the evidence if the hypothesis is false, p . These reverse conditional probabilities – of the evidence on the truth or falsehood of the hypothesis – are sometimes known as likelihoods. I shall refer to the approach to confirmation that uses them as the likelihood approach.For each of these approaches, there are two obvious options as to how to define the confirmation function. The first is to define it as the difference between the magnitude that is treated as increasing confirmation or p ) and the magnitude that is treated as decreasing confirmation or p ). The second is to define confirmation as the quotient of these two magnitudes.This yields four different measures of confirmation, represented in the following table: Differences RatiosProbabilities PD = p – p1 PR = Graphic2Likelihoods LD = p – p3 LR = Graphic4All these measures agree on whether or not E provides some support for H. Intuitively, we want to say that E provides some support for H just in case learning that E is true would make us assign a higher probability to H, i.e. when p(H …. (shrink)

An introduction to the basic concepts and results of contemporary logic, including a discussion of the basic mathematical tools needed to master the technical aspects of the subject.

According to actualism, modal reality is constructed out of valuations (combinations of truth values for all propositions). According to possibilism, modal reality consists in a set of possible worlds, conceived as independent objects that assign truth values to propositions. According to possibilism, accounts of modal reality can intelligibly disagree with each other even if they agree on which valuations are contained in modal reality. According to actualism, these disagreements (possibilist disagreements) are completely unintelligible. An essentially actualist semantics for modal propositional (...) logic specifies which sets of valuations are compatible with the meanings of the truth-functional connectives and modal operators without drawing on formal resources that would enable us to represent possibilist disagreements. The paper discusses the availability of an essentially actualist semantics for modal propositional logic. I argue that the standard Kripkean semantics is not essentially actualist and that other extant approaches also fail to provide a satisfactory essentially actualist semantics. I end by describing an essentialist actualist semantics for modal propositional logic. (shrink)

In this paper I assess the two central ingredients of Laurence BonJour’s position on empirical knowledge that have survived the transition from his earlier coherentist views to his current endorsement of the doctrine of the given: his construal of the problem of the epistemic regress and his rejection of an internalist solution to the problem. The bulk of the paper is devoted to a critical assessment of BonJour’s arguments against externalism. I argue that they fail to put real pressure on (...) externalism, as they rely on a highly questionable conception of epistemic rationality and responsibility. Then, more briefly, I take issue with BonJour’s endorsement of the irrelevance thesis—the claim that even if externalism were true it would not offer a satisfactory solution to the epistemic regress problem. I contend that he is not entitled to subscribe this thesis unless he is prepared to abandon his construal of the problem. (shrink)

I offer an interpretation of Wittgenstein's claim that Russell's theory of judgment fails to show that it's not possible to judge nonsense.

I use some ideas of Keith DeRose's to develop an (invariantist!) account of why sceptical reasoning doesn't show that I don't know that I'm not a brain in a vat. I argue that knowledge is subject to the risk-of-error constraint: a true belief won’t have the status of knowledge if there is a substantial risk of the belief being in error that hasn’t been brought under control. When a substantial risk of error is present (i.e. beliefs in propositions that are (...) false in nearby worlds), satisfying the constraint requires bringing the risk under control. This is achieved either by sensitivity, i.e. you wouldn’t have the belief if it were false, or by identifying evidence for the proposition. However, when the risk of error is not substantial (i.e. beliefs in propositions that are not false in nearby worlds), the constraint is satisfied by default. My belief that I am not a brain in a vat is insensitive and I have no evidence for it, but since it is not false in nearby worlds, it satisfies the constraint by default. (shrink)

James Shaw has written an excellent book on Wittgenstein’s rule-following considerations. It manages to provide fresh perspectives on a topic on which it seemed.

Replies to contributions to a symposium on the book, Scepticism and Reliable Belief.

Psychologists have demonstrated the value of diversity – particularly diversity of viewpoints – for enhancing creativity, discovery, and problem solving. But one key type of viewpoint diversity is lacking in academic psychology in general and social psychology in particular: political diversity. This article reviews the available evidence and finds support for four claims: (1) Academic psychology once had considerable political diversity, but has lost nearly all of it in the last 50 years. (2) This lack of political diversity can undermine (...) the validity of social psychological science via mechanisms such as the embedding of liberal values into research questions and methods, steering researchers away from important but politically unpalatable research topics, and producing conclusions that mischaracterize liberals and conservatives alike. (3) Increased political diversity would improve social psychological science by reducing the impact of bias mechanisms such as confirmation bias, and by empowering dissenting minorities to improve the quality of the majority's thinking. (4) The underrepresentation of non-liberals in social psychology is most likely due to a combination of self-selection, hostile climate, and discrimination. We close with recommendations for increasing political diversity in social psychology. (shrink)

I focus on a family of inferences that are intuitively incapable of producing knowledge of their conclusions, although they appear to satisfy sufficient conditions for inferential knowledge postulated by plausible epistemological theories. They include Moorean inferences and inductive-bootstrapping inferences. I provide an account of why these inferences are not capable of producing knowledge. I argue that the reason why these inferences fail to produce knowledge of their conclusions is that inferential knowledge requires that the subject is more likely to believe (...) the premises of the inference if the conclusion is true than if it is false. I end by comparing the treatment of these cases that emerges from the approach that I recommend with the position advocated by Sherrilyn Roush in her recent book, Tracking Truth (2005). (shrink)

Standard definitions of logical consequence for formal languages are atomistic. They take as their starting point a range of possible assignments of semantic values to the extralogical atomic constituents of the language, each of which generates a unique truth value for each sentence. In modal logic, these possible assignments of semantic values are generated by Kripke-style models involving possible worlds and an accessibility relation. In first-order logic, they involve the standard structures of model theory, as sets of objects from which (...) the extralogical symbols of the language receive their denotations. I argue that there is an alternative, holistic, approach to the task of defining logical consequence for a formal language. It specifies necessary and sufficient conditions for an assignment of truth values to all the sentences of the language to be compatible with the intended interpretation of its logical constants. It achieves this without invoking possible assignments of semantic values to the extralogical atomic constituents of the language, or the formal resources that are employed to generate these. I show how this approach can be successfully applied to modal propositional logic and to first-order logic, modal as well as nonmodal. I show that the holistic definitions of logical consequence that I supply for these languages are equivalent to the standard atomistic definitions. (shrink)

I consider the problem of reflective knowledge faced by views that treat sensitivity as a sufficient condition for knowledge, or as a major ingredient of the concept, as in the analysis I advance in Scepticism and Reliable Belief. I present the problem as concerning the correct analysis of SATs — beliefs to the effect that one of my current beliefs is true. I suggest that a plausible analysis of SATs should treat them as neither true nor false when they ascribe (...) truth to a non-existent belief. I argue that the problem is inescapable if we construe SATs as ascribing the property of truth to a belief. Deflationism manages to avoid the problem of reflective knowledge, but it does so by violating alethic priority — the principle that our account of representation must be built on our account of truth. I argue that we can avoid the problem of reflective knowledge while preserving alethic priority with a pragmatist account of truth — according to which truth is explicated in terms of the rules that govern the practice of assessing judgments and related items as true or false. (shrink)

Volume 2, Issue 3, September 2018, Page 343-354.