“Tell me," Wittgenstein once asked a friend, "why do people always say, it was natural for man to assume that the sun went round the earth rather than that the earth was rotating?" His friend replied, "Well, obviously because it just looks as though the Sun is going round the Earth." Wittgenstein replied, "Well, what would it have looked like if it had looked as though the Earth was rotating?” What would it have looked like if we looked at all (...) sciences from the viewpoint of Wittgenstein’s philosophy? Wittgenstein is undoubtedly one of the most influential philosophers of the twentieth century. His complex body of work has been analysed by numerous scholars, from mathematicians and physicists, to philosophers, linguists, and beyond. This volume brings together some of his central perspectives as applied to the modern sciences and studies the influence they may have on the thought processes underlying science and on the world view it engenders. The contributions stem from leading scholars in philosophy, mathematics, physics, economics, psychology and human sciences; all of them have written in an accessible style that demands little specialist knowledge, whilst clearly portraying and discussing the deep issues at hand. (shrink)

This book is about Karl Popper's early writings before he began his career as a philosopher. The purpose of the book is to demonstrate that Popper's philosophy of science, with its emphasis on the method of trial and error, is largely based on the psychology of Otto Selz, whose theory of problem solving and scientific discovery laid the foundation for much of contemporary cognitive psychology. By arguing that Popper's famous defence of the method of falsification as well as his elaboration (...) of an evolutionary theory of knowledge are equally indebted to German psychology, Michel ter Hark challenges the received view of the development of Popper's philosophy. The book concludes with a reinterpretation of Popper's theory of the mind-body problem, emphasizing its contemporary relevance. (shrink)

On the basis of his unpublished thesis ‘Gewohnheit und Gesetzerlebnis in der Erziehung’ a historical reconstruction is given of the genesis of Popper's ideas on induction and demarcation which differs radically from his own account in Unended quest. It is shown not only that he wholeheartedly endorses inductive epistemology and psychology but also that his ‘demarcation’ criterion is inductivistic. Moreover it is shown that his later demarcation thesis arises not from his worries about, on the one hand, Marxism and psychoanalysis (...) and, on the other hand, Einstein's physics, but rather from his urgent preoccupation with providing pedagogy with a psychological foundation, which has its sources in Karl Bühler's cognitive psychology as well as, surprisingly, Adler's Characterology. Aside from Adler some lesser known psychologists, such as Karl Groos, will also be seen to have played a formative role on Popper's early thinking. (shrink)

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How does the philosophical problem about mental processes and states and behaviourism arise?—The first step is the one that altogether escapes notice. We talk of processes and states and leave their nature undecided. Sometimes perhaps we shall know more about them—we think. But that is just what commits us to a particular way of looking at the matter. And now the analogy which was to make us understand our thoughts falls to pieces. So we have to deny the yet uncomprehended (...) process in the yet unexplored medium. And now it looks as if we had denied mental processes. And naturally we don’t want to deny them. (shrink)

How does the philosophical problem about mental processes and states and behaviourism arise?—The first step is the one that altogether escapes notice. We talk of processes and states and leave their nature undecided. Sometimes perhaps we shall know more about them—we think. But that is just what commits us to a particular way of looking at the matter. And now the analogy which was to make us understand our thoughts falls to pieces. So we have to deny the yet uncomprehended (...) process in the yet unexplored medium. And now it looks as if we had denied mental processes. And naturally we don’t want to deny them. (shrink)

The aim of this article is to show that one of Popper's key ideas in epistemology, his so-called theory of the searchlight, is derived from early German Denkpsychologie, in particular the theory of schematic anticipations of Otto Selz. With his theory of schematic anticipations Selz intended to replace various forms of association psychology. Likewise Popper's theory of the searchlight aims to replace empiricism in epistemology (the Bucket theory, as he calls it). On the basis of Popper's still unpublished manuscripts on (...) psychology between 1927 and 1931, it is shown that his position became increasingly Selzian. The term "Bucket theory" is used by him for the first time in an article in which he defends Selz, and in his earlier Ph.D. thesis there occur passages which show him in complete agreement with the theory of schematic anticipations. It is argued that Popper's Selzian stance in psychology finally enabled him to develop his characteristic deductive stance in epistemology and philosophy of science. It is also emphasized that Popper never credits Selz for this formative role. (shrink)

This essay sketches the potential implications of Wittgensteinian thought for conceptualizations of socalled fictive mental states, e.g. mental calculating, imagination, pretend play, as they are currently discussed in developmental psychology and philosophy of mind. In developmental psychology the young child's pretend play and make-belief are seen as a manifestation of the command of an underlying individualistic “theory of mind”. When saying “This banana is a telephone” the child's mind entertains simultaneously two mental representations, a primary or veridical representation about the (...) real properties of banana's and a pretend representation. It is the task of psychology to explain how this “double knowledge” does not result in conceptual chaos. Various sorts of internal mechanisms are postulated. In this essay it is argued that the threat of chaos is misconceived, and that the solutions are irrelevant. Following Wittgenstein's sparse remarks about the secondary sense of words, I argue that pretend language does not refer to underlying individual mental representations but to the child's creative transference of words used in one, primary, domain of application to another, secondary domain. The command and use of the secondary domain logically presupposes the command and use of the primary domain. Since the latter domain is necessarily public and social, fictive mental states cannot be dealt with purely individualistically as current mentalism assumes. (shrink)

The aim of this article is to give both a sustained interpretation of Wittgenstein’s obscure remarks on the experience of meaning of language, synthaesthesia and secondary use and to apply his insights to recent philosophical discussions about synthaesthesia. I argue that synthaesthesia and experience of meaning are conceptually related to aspect-seeing. The concept of aspect-seeing is not reducible to either seeing or imaging but involves a modified notion of experience. Likewise, synthaesthesia involves a modified notion of experience. In particular, the (...) concept of synthaesthesia involves a secondary use of ‘experience’ and hence is intrinsically dependent on the primary use of language. Recent discussions tend to overlook this distinction between the primary and secondary use of language. (shrink)

This chapter focuses on sections iv and v of part II of Wittgenstein’s Philosophical Investigations. In these sections Wittgenstein deals with two closely knit problems: our knowledge of other minds and the subject matter of psychology. The interpretation of Wittgenstein’s treatment of these problems cannot remain confined to these sections, however, as equally important references to these problems occur elsewhere in the Investigations as well as in the Remarks on the Philosophy of Psychology. Moreover, Wittgenstein’s very treatment of the two (...) problems is intertwined with his treatment of some other problems in the philosophy of psychology. For instance, in the context of his discussion of the subject matter of psychology, he points out analogies with problems pertaining to theories of perception. I take these analogies seriously and, therefore, a discussion of perception is interwoven as appropriately. Yet another preliminary remark. Although references to other philosophers and psychologists do not occur in sections iv and v, it does not follow that they were not written in response to others. On the contrary, a substantial part of these (and other) sections is the product of reflecting upon theories produced by Russell, James and Köhler. In my view, the best way to understand Wittgenstein is to involve the standpoints of his adversaries explicitly into the discussion. Otherwise seemingly trivial questions and condensed remarks, gain power and depth when explicitly seen as undermining and reversing dominant theories in philosophy and psychology. (shrink)

The idea that we acquire knowledge by trial and error has been one of the truly great ideas of the twentieth century. As no reader of his philosophical and autobiographical work could have failed to notice, Karl Popper credits himself for having invented this idea. The theory of trial and error or, in Popper's words, the Searchlight theory of knowledge and mind, is not just a part of Popper's comprehensive philosophy but rather one of its key features. It is at (...) the bottom of some of his most spectacular achievements in methodology, epistemology, the philosophy of biology, and even political philosophy. Indeed, it is put forward at once as a model for the growth of individual knowledge (both human and animal), the growth of life (Darwin's theory of evolution), and the growth of scientific knowledge (philosophy of science). As happens so often with innovative ideas, the Searchlight theory derives much of its glamour from the theory it rejects: the view of the mind being a tabula rasa and sense perception the origin of all (human) knowledge. Popper nicknames this empiricists' view as the Bucket theory since it conceives of the mind as nothing but the conduit for sense-impressions, an empty bucket to be filled by the accumulation and storage of information. 1 In his hands the Bucket theory collapses under the strain of philosophical arguments and scientific facts and is replaced by a theory which maintains that our knowledge of the physical world is drawn from our mind and constructed from the repertoire of knowledge dispositions we already possess. Acquiring dispositions proceeds according to the method of trial and error elimination. This method, Popper contends, consists essentially of three stages: forming a problem or expectation, trying out a number of solutions of the problem, and eliminating or discarding false solutions as erroneous. 2 A key feature of Popper's theory of trial and error elimination, and the reason for speaking of a Searchlight theory of knowledge and mind, is his insistence that problems or expectations take precedence over observations. Observations are always preceded by expectations, points of view, questions or problems which, as a searchlight, illuminate a certain area, thereby enabling the organism or the scientist to know what to observe in the first place. -/- The question arises how and when did Popper come to this theory of the growth of knowledge and mind which was to have such radical implications for the philosophy of science, epistemology, and the philosophy of psychology? My aim in this article is to trace the roots of his theory of the Searchlight. The earliest traces of the theory are to be found in his unpublished dissertation, Zur Methodenfrage der Cognitive psychology (1928). Here I will focus upon this "hasty last minute affair" written in the tradition of early German cognitive psychology and supervised by one of its most outstanding proponents, Karl Bühler. Scrutiny of this manuscript, however, reveals not so much the formative influence of Bühler as that of Otto Selz. Indeed, I will argue that Popper borrowed his crucially important Searchlight theory from Selz. Thus having found the origin of the key notion of his epistemology in psychology, the relation between psychology and philosophy in Popper's work, always fraught with tension, is up for thorough reconsideration. (shrink)

In this article it is argued that Popper's well-known deductive and falsificationistic epistemology is historically rooted in German psychology, notably the work of Otto Selz. Drawing on Popper's early and still unpublished psychological manuscripts it is shown how Otto Selz's psychology of thinking with its emphasis on the guiding role of schematic anticipations gave the impetus to Popper's theory of problem solving, his theory of the Searchlight, and its attendant rejection of empiricism, the so-called Bucket theory of knowledge. In the (...) second part of the article it is argued that Selz's theory of schematic anticipations is rooted in Meinong's Gegenstandstheorie. Because Meinong's theory was partly an attempt to do justice to the objectivity of thinking, this may explain why the anti-psychologist Popper felt nevertheless attracted to the psychology of Selz. (shrink)

This paper discusses a neglected theme in Wittgenstein’s writings on meaning and psychology from the early 1930s until 1949. Throughout this period Wittgenstein deals with aspects of meaning of words and pictures that cannot be accounted for in dispositional terms but have to be related to experience and perception. Wittgenstein’s reading of William James, I argue, has sharpened his eye for the many pitfalls in coming to terms with this experiential notion of meaning. James’s treatment of experiences of meaning succumbs (...) to the temptation to postulate “meaning-bodies,” bearers of meaning apart from the way and context in which we use the particular words. I argue that the conflation of what Wittgenstein calls the transitive and intransitive use of words is at the root of postulating meaning-bodies. I also argue that contemporary treatments of experiences of meaning are similarly vulnerable to James’s confusion. (shrink)

This article presents a critical analysis of the views of Michael Sandel on human enhancement in his book The Case Against Perfection (2007). Sandel argues that the use of biotechnologies for human enhancement is driven by a will to mastery or hybris, leading to an ‘explosion of responsibility’ and a disappearance of solidarity. I argue that Sandel is using a traditional concept of solidarity which leaves little room for individual differences and which is difficult to reconcile with the modern (...) trend towards individual autonomy and cultural heterogeneity. With reference to the sociology of Giddens, I argue that the ‘explosion of responsibility’ can be considered an expression of the insecurity in modern society and the need for reflexivity in personal and social life. I argue that the need for reflexivity is a driving social and cultural force behind the interest in human enhancement, and that this trend can go together with a commitment to take care of the needs of others. I agree with Sandel that there is a risk that human enhancement may develop into ‘hybris’, particularly when enhancement is driven by scientism and a naturalist reduction of human values to neurological processes. Enhancement based on scientism will threaten solidarity defined by Honneth as an interactive relationship aimed at the mutual recognition of individual identities in relation to a shared value horizon. I will call for a reflective approach in which human enhancement technologies are explored in the context of a ‘system of reference’. Such a reflective approach will help to protect against the hybris of scientism and to maintain solidarity with vulnerable groups. (shrink)

_ Source: _Volume 25, Issue 1, pp 95 - 104 Martin Buber was a creative and heterodox socialist thinker. His socialist utopia was based on the idea of a new community that does not hark back to ancient forms, but wants to overcome modern society while incorporating its achievements, such as the principle of individual freedom. It is not bound, like the old _Gemeinschaft_—the tribe, the clan, the religious sect—by one single word or opinion that soon freezes into dogma (...) and rigid law, but by a common life characterized by freedom and creativity, which require a diversity of opinions. (shrink)

Die Frage nach dem Verhältnis von Moral und Philosphie der Moral stellt sich für den Verfasser als Frage nach dor Notwendigkeit einer philosophischen Ethik sowohl grundsätzlich wie insbesondere heute. In dem Beitrag wird gezeigt, daß in zweierlei Hinsicht mit Recht und triftigen Gründen von der Notwendigkeit einer philosophischen Ethik gesprochen werden kann: 1) in Hinblick auf das systematische Verhältn is von Moral und philosophischer Ethik und 2) im Hinblick auf das geschichtliche Verhältnis beider, das durch die Strukturunserer gegenwärtigen Lebenswelt begründet (...) ist. Die grundlegende den Rahmen für die anderen vorgebende These des Aufsatzes lautet: Philosophische Ethik ist aufgrund der allgemeinen Züge, Bedingungen und Folgeerscheinungen demokratisch verfaßter hochkomplexer Industriegesellschaften struktur-funktional notwendig, da Gesellschaften dieses Typs eine notwendigerweise amorphe Öffentlichkeit ausbilden und wegen des Verlustes allgemein verbindlicher Weltbilder sowie durch die zwangsläufige Partikulariesierung der Lebensverhältnisse, die eine Privatiserung der Religionen im Gefolge hat, eine Lebensbedrohende Dialektik von Pluralismus der Moralen und abstrakter Einheitsmoral erzeugen. (shrink)

There is a special need for solidarity at the global level to address global health disparities. Ter Meulen argues that solidarity must complement justice, and is, in fact, more fundamental than justice to the arrangement of health care practices. We argue that PG/SHG, though a theory of justice, is fundamentally synergistic with solidarity. We relate PG/SHG to Jodi Dean’s conceptual work on reflective solidarity, contrasted with conventional solidarity, as an approach to transnational solidarity that dovetails with PG/SHG. We argue that (...) PG/SHG meets both the need for solidarity at the global level and the need for solidarity within theories of the arrangement of health care practices. (shrink)

This paper is a defense of investigations into the meanings of words by reflecting on their use as a philosophical method for investigating the emotions. The paper defends such conceptual analysis against the critique that it is short of empirical grounding and at best reflects current “common-sense beliefs.” Such critique harks back to Quine’s attack on the analytic/synthetic distinction, his idea that all language is theory dependent and the subsequent critique of “linguistic philosophy” as sanctifying our ordinary use of words, (...) as empirically naïve, unscientific and founded on outmoded theories of meaning. This paper is an attempt to show why such critique is misplaced. Conceptual analysis, properly construed, need not depend on empirical considerations. On the contrary, conceptual analysis of emotions is often a prerequisite to empirical investigations. Furthermore, conceptual analysis need not make ordinary language sacred and need not rely on a theory of meaning or on an analytic/synthetic distinction. (shrink)

A preface is best written last, after a book is done and its author may look back to survey what he hopes he has accomplished and what he must admit he has not. In hindsight virginity by itself has seemed a very large field to till, but with that reflection also comes a sense of the awareness that a really comprehensive treatment of misgiving, that subject would somehow have to encompass an enormous ter rain, the whole length and breadth of (...) Christianity's attitude toward sexuality from the earliest times down to the high Middle Ages. It could be argued that no small book could cover so much ground, and I would be the first to agree. As its subtitle is meant to suggest, the present work is, in at least two senses of the word, an essay: both an initial and tentative effort to get at the meaning of an extremely important but as yet unprobed medieval belief in the perfective value of the virginal life; and an interpretive study of a complex subject from a limited point of view, specifically, that in which the virgin appears in devotional literature as the bride of Christ. (shrink)

Contextualizar os processos oriundos de um período pandêmico é reconhecer que, para a nossa sociedade, o que vivemos com a pandemia da Covid-19 foi, de fato, inédito e histórico. Além de apresentar um cenário de acúmulo de emoções, mudança de rotina e sentimentos de medo e angústias, uma nova forma de interação social e trabalho precisou ser vivenciada. Assim, verificamos a importância de levantar reflexões acerca da maternidade vivenciada no contexto de isolamento social pelas mulheres que são mães discentes e (...) que precisaram conciliar suas atividades de cuidados diários com os estudos acadêmicos. É fundamental refletir sobre como funcionou o ambiente universitário no formato virtual e como tem sido o processo de retorno às aulas presenciais. Desse modo, neste artigo, o objetivo é apresentar reflexões acerca dos efeitos que o isolamento social no contexto da Covid-19 pode ter gerado à saúde mental de mulheres que são mães e universitárias. Tal texto compõe o levantamento bibliográfico do projeto de pesquisa “Atenção à saúde mental de mães universitárias no contexto da Covid-19”, realizado no curso de Psicologia da Universidade Federal do Pará. Acreditamos ser possível vivenciar no ambiente acadêmico aquilo que consideramos uma clínica da situação contemporânea e que colabora para a criação de espaços de acolhimento dentro da Universidade. No caso específico desta pesquisa, buscamos um acolhimento voltado para as mães universitárias que buscam permanecer nesses espaços, mesmo diante de tantos desafios. (shrink)

As a version of creationism—which claims that fictional charac- ters are created by authors who write characters into existence by penning their names in their works—abstract creationism claims that fictional objects are abstract entities. However, I want to modify the conception of what constitutes a fictional object. In short, I am going to give a defense of abstract creationism that offers answers to the questions, as outlined by Stuart Brock, of ontology, identity, and plenitude by developing a claim that—except for (...) rigidly referring proper names—fictional terms and nonfictional terms are all abstract objects.Working off the debates surrounding abstract creationism, and with a nod to D. M. Armstrong's... (shrink)

*I would like to thank Michel ter Hark, Lodi Nauta and James Connelly, for their critical reading of earlier versions of this paper and for their comments. Gilbert Ryle and R. G. Collingwood are no...

The early research of Karl Popper both in psychology and in philosophy of science is described; its basis for his later breakthroughs in the philosophy of science is explained. His debt to Otto Selz’s thought psychology is thereby detailed. Otto Selz’s philosophy of science is then explained, and its conflict with Popper’s early as well as his later views is portrayed. These studies of the conflicting views of Popper’s early views and Selz’s philosophy of science provide the basis for demonstrating (...) the mistakes that Michel ter Hark has made in claiming that the alleged originality of Popper’s views occurred only in the 1970s and are little more than a rehash of Selz’s alleged evolutionary epistemology. (shrink)

Denkpsychologie has been important for the development of psychology as well as of philosophy during the last century. More specifically, cognitive psychology as well as Karl Popper’s evolutionary epistemology were both influenced by Otto Selz’s cognitive psychology. Without doubt, Selz played a role in the development of Popper’s thinking, but Michel ter Hark has not given convincing evidence for Popper’s idea of bold conjectures being influenced by Selz.

This collection of 17 articles offers an overview of the philosophical activities of a group of philosophers (who have been) working at the Groningen University. The meta-methodological assumption which unifies the research of this group, holds that there is a way to do philosophy which is a middle course between abstract normative philosophy of science and descriptive social studies of science. On the one hand it is argued with social studies of science that philosophy should take notice of what scientists (...) actually do. On the other hand, however, it is claimed that philosophy can and should aim to reveal cognitive patterns in the processes and products of scientific and common sense knowledge. Since it is thought that those patterns can function as guidelines in new research and/or in research in other disciplines, philosophy can nevertheless hold on to the normative aim which is characteristic of 'classical' philosophy of science. Compared to this common assumption, there is a diversity of subjects. Some papers deal with general problems of science, knowledge, cognition and argumentation, others with topics relating to foundational problems of particular sciences. Therefore this volume is of interest to philosophers of science, to philosophers of knowledge and argumentation in general, to philosophers of mind, as well as for scientists working in the physical and applied sciences, biology, psychology and economy who are interested in the foundations of their disciplines. After a foreword by Leszek Nowak and a general introduction by the editors, the book is divided into four parts, with special introductions. - I: Conceptual Analysis in Service of Various Research Programmes (Henk Zandvoort, Rein Vos, Rick Looijen, Gerben Stavenga, Renée Dalitz); - II: The Logic of the Evaluation of Arguments, Hypotheses, Default Rules, and Interesting Theorems (Erik Krabbe, Theo Kuipers, Alfons Keupink, Maarten Janssen/Yao-Hua Tan, Bert Hamminga); - III: Three Challenges to the Truth Approximation Programme (Sjoerd Zwart, Hinne Hettema/Theo Kuipers, Roberto Festa); - IV: Explicating Psychological Intuitions (Anne-Ruth Mackor, Jeanne Peijnenburg, Lex Guichard, Michel ter Hark). The Groningen research group was recently qualified, by an official international assessment committee, as one of the best philosophy research groups in the Netherlands. (shrink)

In this paper I explore Phyllis Rooney’s 2003 chapter, “Feminist Epistemology and Naturalized Epistemology: An Uneasy Alliance,” taking guidance from her critique of naturalized epistemology in pursuing my own analysis of another uneasy alliance: that between feminist epistemology and social epistemology. Investigating some of the background assumptions at work in prominent conceptions of social epistemology, I consider recent analyses of "epistemic bubbles" to ask how closely such analyses are aligned with ongoing research in feminist epistemology. I argue that critical feminist (...) insights in political philosophy are called for here, especially those that focus on multiple politically salient relationships and also emphasize practices of personal transformation as inseparably bound up with broader movements for social transformation. Insofar as feminist epistemology continues to carry another world in its heart, I argue that it will continue to rest uneasily with any effort to align it with—let alone subsume it within—the still emerging field of social epistemology. (shrink)

This paper contributes to our understanding of farm data value chains with assistance from 54 semi-structured interviews and field notes from participant observations. Methodologically, it includes individuals, such as farmers, who hold well-known positionalities within digital agriculture spaces—platforms that include precision farming techniques, farm equipment built on machine learning architecture and algorithms, and robotics—while also including less visible elements and practices. The actors interviewed and materialities and performances observed thus came from spaces and places inhabited by, for example, farmers, crop (...) scientists, statisticians, programmers, and senior leadership in firms located in the U.S. and Canada. The stability of “the” artifacts followed for this project proved challenging, which led to me rethinking how to approach the subject conceptually. The paper is animated by a posthumanist commitment, drawing heavily from assemblage thinking and critical data scholarship coming out of Science and Technology Studies. The argument’s understanding of “chains” therefore lies on an alternative conceptual plane relative to most commodity chain scholarship. To speak of a data value chain is to foreground an orchestrating set of relations among humans, non-humans, products, spaces, places, and practices. The paper’s principle contribution involves interrogating lock-in tendencies at different “points” along the digital farm platform assemblage while pushing for a varied understanding of governance depending on the roles of the actors and actants involved. (shrink)

One recurrent objection to the idea that the right kind of reasons for or against an attitude are object-given reasons for or against that attitude is that object-given reasons for or against belief and disbelief are incapable of explaining certain features of epistemic normativity. Prohibitive balancing, the behaviour of bare statistical evidence, information about future or easily available evidence, pragmatic and moral encroachment, as well as higher-order defeaters, are all said to be inexplicable in terms of those object-given reasons. In (...) this paper, I provide a rebuttal to all these challenges by drawing attention to the object-given reasons for and against the third doxastic state, namely the suspension of judgement. First, I introduce an original picture of how suspension relates to belief and disbelief – as ways of being decided – which yields a novel weighing model of the corresponding reasons. Second, I demonstrate that this new take on doxastic deliberation can accommodate all five features of epistemic normativity. Finally, I extend the weighing model to cover practical deliberation and the suspension of intentions. The resulting theory provides an explanation of why epistemic and practical normativity differ in certain respects in terms of a significant difference between doxastic and conative suspension. (shrink)

Radical skepticism endorses the extreme claim that large swaths of our ordinary beliefs, such as those produced by perception or memory, are irrational. The best arguments for such skepticism are, in their essentials, as familiar as a popular science fiction movie and yet even seasoned epistemologists continue to find them strangely seductive. Moreover, although most contemporary philosophers dismiss radical skepticism, they cannot agree on how best to respond to the challenge it presents. In the tradition of the 18th century Scottish (...) philosopher, Thomas Reid, Radical Skepticism and Epistemic Intuition joins this discussion by taking up four main tasks. First, it identifies the strongest arguments for radical skepticism, namely, underdetermination arguments, which emphasize the gap between our evidence and our ordinary beliefs based on that evidence. Second, it rejects all inferential or argument-based responses to radical skepticism, which aim to lay out good noncircular reasoning from the evidence on which we base our ordinary beliefs to the conclusion that those beliefs are probably true. Third, it develops a commonsense noninferential response to radical skepticism with two distinctive features: it consciously and extensively relies on epistemic intuitions, which are seemings about epistemic goods, such as knowledge and rationality, and it can be endorsed without difficulty by both internalists and externalists in epistemology. Fourth, and finally, it defends this commonsense epistemic-intuition-based response to radical skepticism against a variety of objections, including those connected with underdetermination worries, epistemic circularity, disagreement problems, experimental philosophy, and concerns about whether it engages skepticism in a sufficiently serious way. (shrink)