Ambitious and elegant, this book builds a bridge between evolutionary theory and cultural psychology. Michael Tomasello is one of the very few people to have done systematic research on the cognitive capacities of both nonhuman primates and human children. The Cultural Origins of Human Cognition identifies what the differences are, and suggests where they might have come from. -/- Tomasello argues that the roots of the human capacity for symbol-based culture, and the kind of psychological development that takes place (...) within it, are based in a cluster of uniquely human cognitive capacities that emerge early in human ontogeny. These include capacities for sharing attention with other persons; for understanding that others have intentions of their own; and for imitating, not just what someone else does, but what someone else has intended to do. In his discussions of language, symbolic representation, and cognitive development, Tomasello describes with authority and ingenuity the "ratchet effect" of these capacities working over evolutionary and historical time to create the kind of cultural artifacts and settings within which each new generation of children develops. He also proposes a novel hypothesis, based on processes of social cognition and cultural evolution, about what makes the cognitive representations of humans different from those of other primates. -/- Lucid, erudite, and passionate, The Cultural Origins of Human Cognition will be essential reading for developmental psychology, animal behavior, and cultural psychology. (from the HUP website). (shrink)

Ramscar, Yarlett, Dye, Denny, and Thorpe (2010) showed how, consistent with the predictions of error‐driven learning models, the order in which stimuli are presented in training can affect category learning. Specifically, learners exposed to artificial language input where objects preceded their labels learned the discriminating features of categories better than learners exposed to input where labels preceded objects. We sought to replicate this finding in two online experiments employing the same tests used originally: A four pictures test (match a label (...) to one of four pictures) and a four labels test (match a picture to one of four labels). In our study, only findings from the four pictures test were consistent with the original result. Additionally, the effect sizes observed were smaller, and participants over‐generalized high‐frequency category labels more than in the original study. We suggest that although Ramscar, Yarlett, Dye, Denny, and Thorpe (2010) feature‐label order predictions were derived from error‐driven learning, they failed to consider that this mechanism also predicts that performance in any training paradigm must inevitably be influenced by participant prior experience. We consider our findings in light of these factors, and discuss implications for the generalizability and replication of training studies. (shrink)

In this original and provocative account of the evolutionary origins of human communication, Michael Tomasello connects the fundamentally cooperative structure of human communication (initially discovered by Paul Grice) to the especially ...

Michael Tooley presents a major new philosophical theory of the nature of time, offering a powerful alternative to the traditional "tensed" and recent "tenseless" accounts of time. He argues for a dynamic conception of the universe, in which past, present, and future are not merely subjective features of experience. He claims that the past and the present are real, while the future is not. Tooley's approach accounts for time in terms of causation. He therefore claims that the key to (...) understanding the dynamic nature of the universe is to understand the nature of causation. Time, Tense, and Causation is a landmark treatment of one of the oldest and most perplexing intellectual problems, and will be fascinating reading for anyone interested in the character of time. (shrink)

All large-scale telescope facilities are constructed within a geographical, social, historical, and political context that includes nested layers at the global, national, and local levels. However, discussions about the geographic siting of astronomy facilities, for example, the communities in which they are embedded or the interactions between the facility and its locale, are uncommon in social science studies of astronomy, and no extant review focused on this gap in the literature. In this literature review and discourse analysis, we explore the (...) ways in which research about astronomy facilities and their local communities has emerged, and the extent to which it focuses on the Global South. We find that literature addressing the social and policy aspects of astronomy facilities has an emphasis on the Global North. However, literature addressing host communities has an emphasis on the Global South. Broadly, the discourses related to host communities in the Global South have emerged from reflections on the controversies related to large-scale telescopes in Hawai’i, Chile, and South Africa. One common theme linking these discourses is that a focus on benefits at the national and international levels obscures a range of problematic power dynamics and outcomes at the local level. The notion of the Global South as an ‘empty space’ in which astronomical observation does not constitute impactful action amongst local communities, is challenged by discourses that centre local contexts, and challenged by discourses that employ conceptual frameworks with a focus on revealing power dynamics. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:714 BOOK REVIEWS learning; the Jesuits lean to the voluntarist. Possessed of a unitary academic model, he is really arguing for Aristotle's analogy of attribution. Apparently, no one of his 200 plus Jesuit contacts told him that Nastri prefer St. Thomas and his analogy of proper proportionality. The historian Daniel Boorstin spent 25 yeari!l writing his trilogy on The Americans. What emerges from this analysis? Boorstin points out that (...) Americans like ambiguity, that they function best amid flux; ambivalence becomes their proper medium. For this reason, I have accepted Nathaniel Hawthorne as our most central writer. He situates American questions within a landscape of chiaroscuro. The Jesuit experience in the United States belongs essentially to the same landscape. But today, as formerly, it remains a landscape of questions. McDonough, on the other hand, has too many certitudes, too many answers, too much high definition-what Henry Adams regards as "mere facts." Instead of illuminating the landscape from within, his study inevitably recedes into the larger ambiguity reserved for what Wallace Stevens has called, " Prologues to what is possible." Saint Paul University Ottawa, Ontario JOHN P. McINTYRE, S.J. The Dilemma of Freedom and Foreknowledge. By LINDA TRINKAUS ZAGZEBSKI. New York: Oxford University Press, 1991. viii + 215 pp. $29.95. As a Christian and a philosopher, Linda Trinkaus Zagzebski wants to understand why it is reasonable to affirm that we remain free despite God's infallible knowledge of our future acts. Moreover, she is not content simply to demonstrate that this affirmation involves no logical con· tradiction, for "reasonable people expect more" (p. 33) than a merely negative result. Hence the author sets herself the more ambitious task of working toward a positive solution that would explain why the compatibility of divine foreknowledge and human freedom is plausible and not a bare logical possibility. The hook sorts out recent opinions on the subject and sketches an original position that she hopes will advance the discussion. Zagzehski begins by constructing the most formidable version of the dilemma. Assuming that God is infallible and essentially omniscient, that the past has a kind of necessity that the future lacks ("accidental necessity"), and that this necessity can he transferred (in some sense) from the antecedent to the consequent of a conditional proposition, the dilemma may he stated as follows: BOOK REVIEWS (1) Necessarily, God believes at time t 1 that I will do S at t 3 if and only if I do S at t 3. (2) It is accidentally necessary at t 2 that God believes at t 1 that I will do S at t 3. (3) If (1) and (2) are true, then it is accidentally necessary at t 2 that I do Sat t 3. (4) It follows that it is accidentally necessary at t 2 that I do S at t 3. (5) But if it is accidentally necessary at t 2 that I do S at t 3, I do not do S at t 3 freely. (6) Therefore, I do not do S at t 3 freely. 715 Much of the first chapter is devoted to establishing that this form of the dilemma is more resistant to solution than any other, especially the so-called problem of future truth. Zagzebski goes on to evaluate three broad approaches to solving the dilemma. In Chapter 2 she takes up the " timelessness " solution. Its proponents, among whom the author numbers Boethius, Thomas Aquinas, Eleonore Stump, and Norman Kretzmann, negate premise (2) of the foreknowledge dilemma by contending that God is not in time. Zagzebski considers this an acceptable negative solution to the dilemma and sees in it the potential to ground a more comprehensive, positive solution. Nonetheless, she refrains from subscribing wholeheartedly to the timelessness solution because it confronts one with a dilemma at least as perplexing as the one it solves. She puts the problem this way: like the past, eternity is fixed, for it is constituted by a state of affairs about which we cannot do anything; therefore my future acts are determined no less by God's timeless knowledge than by God's foreknowing them in a strictly temporal sense. In Chapter 3, Zagzebski considers... (shrink)

Part I: The representation of life -- Can life be given a real definition? -- The representation of the living individual -- The representation of the life-form itself -- Part II: Naive action theory -- Types of practical explanation -- Naive explanation of action -- Action and time -- Part III: Practical generality -- Two tendencies in practical philosophy -- Practices and dispositions as sources of the goodness of individual actions -- Practice and disposition as sources of individual action.

In this enlightening exploration of our nearest primate relatives, Michael Tomasello and Josep Call address the current state of our knowledge about the cognitive skills of non-human primates and integrate empirical findings from the beginning of the century to the present.

Michael G. Titelbaum presents a new Bayesian framework for modeling rational degrees of belief—the first of its kind to represent rational requirements on agents who undergo certainty loss.

We propose that the crucial difference between human cognition and that of other species is the ability to participate with others in collaborative activities with shared goals and intentions: shared intentionality. Participation in such activities requires not only especially powerful forms of intention reading and cultural learning, but also a unique motivation to share psychological states with others and unique forms of cognitive representation for doing so. The result of participating in these activities is species-unique forms of cultural cognition and (...) evolution, enabling everything from the creation and use of linguistic symbols to the construction of social norms and individual beliefs to the establishment of social institutions. In support of this proposal we argue and present evidence that great apes understand the basics of intentional action, but they still do not participate in activities involving joint intentions and attention. Human children's skills of shared intentionality develop gradually during the first 14 months of life as two ontogenetic pathways intertwine: the general ape line of understanding others as animate, goal-directed, and intentional agents; and a species-unique motivation to share emotions, experience, and activities with other persons. The developmental outcome is children's ability to construct dialogic cognitive representations, which enable them to participate in earnest in the collectivity that is human cognition. Key Words: collaboration; cooperation; cultural learning; culture; evolutionary psychology; intentions; shared intentionality; social cognition; social learning; theory of mind; joint attention. (shrink)

This essay deals with the question of the morality of abortion and infanticide. The fundamental ethical objection traditionally advanced against these practices rests on the contention that human fetuses and infants have a right to life, and it is this claim that is the primary focus of attention here. Consequently, the basic question to be discussed is what properties a thing must possess in order to have a serious right to life. The approach involves defending, then, a basic principle specifying (...) a condition living things must satisfy to have a serious right to life, and the answer given makes it unlikely that this condition is satisfied by human fetuses and infants, though this tentative conclusion could be altered by future scientific studies of the development of the human brain. As things stand at the moment, however, it seems unlikely that developing humans acquire the physical basis of the psychological capacities on which the right to continued existence rests, and therefore unless there are other substantial objections to abortion and infanticide that undercut the above line of thought, the conclusion is that such practices are not intrinsically wrong. (shrink)

Turning an anthropological eye toward cyberspace, Human No More explores how conditions of the online world shape identity, place, culture, and death within virtual communities. Online worlds have recently thrown into question the traditional anthropological conception of place-based ethnography. They break definitions, blur distinctions, and force us to rethink the notion of the "subject." Human No More asks how digital cultures can be integrated and how the ethnography of both the "unhuman" and the "digital" could lead to possible reconfiguring the (...) notion of the "human." This provocative and groundbreaking work challenges fundamental assumptions about the entire field of anthropology. Cross-disciplinary research from well-respected contributors makes this volume vital to the understanding of contemporary human interaction. It will be of interest not only to anthropologists but also to students and scholars of media, communication, popular culture, identity, and technology. (shrink)

This paper is concerned with the question of the truth conditions of nomological statements. My fundamental thesis is that it is possible to set out an acceptable, noncircular account of the truth conditions of laws and nomological statements if and only if relations among universals - that is, among properties and relations, construed realistically - are taken as the truth-makers for such statements. My discussion will be restricted to strictly universal, nonstatistical laws. The reason for this limitation is not that (...) I feel there is anything dubious about the concept of a statistical law, nor that I feel that basic laws cannot be statistical. The reason is methodological. The case of strictly universal, nonstatistical laws would seem to be the simplest case. If the problem of the truth conditions of laws can be solved for this simple subcase, one can then investigate whether the solution can be extended to the more complex cases. I believe that the solution I propose here does have that property, though I shall not pursue that question here.1. (shrink)

This target article presents a theory of human cultural learning. Cultural learning is identified with those instances of social learning in which intersubjectivity or perspective-taking plays a vital role, both in the original learning process and in the resulting cognitive product. Cultural learning manifests itself in three forms during human ontogeny: imitative learning, instructed learning, and collaborative learning – in that order. Evidence is provided that this progression arises from the developmental ordering of the underlying social-cognitive concepts and processes involved. (...) Imitative learning relies on a concept of intentional agent and involves simple perspective-taking. Instructed learning relies on a concept of mental agent and involves alternating/coordinated perspective-taking (intersubjectivity). Collaborative learning relies on a concept of reflective agent and involves integrated perspective-taking (reflective intersubjectivity). A comparison of normal children, autistic children and wild and enculturated chimpanzees provides further evidence for these correlations between social cognition and cultural learning. Cultural learning is a uniquely human form of social learning that allows for a fidelity of transmission of behaviors and information among conspecifics not possible in other forms of social learning, thereby providing the psychological basis for cultural evolution. (shrink)

This book maintains that our conception of consciousness and cognition begins with and depends upon a few fundamental errors. Thau elucidates these errors by discussing three important philosophical puzzles - Spectrum Inversion, Frege's Puzzle, and Black-and-White Mary - each of which concerns some aspect of either consciousness or cognition. He argues that it has gone unnoticed that each of these puzzles presents the very same problem and, in bringing this commonality to light, the errors in our natural conception of consciousness (...) and cognition are also reviewed. (shrink)

Causation: A Realist Approach Traditional empiricist accounts of causation and laws of nature have been reductionist in the sense of entailing that given a complete specification of the non-causal properties of and relations among particulars, it is therefore logically determined both what laws there are and what events are causally related. It is argued here, however, that reductionist accounts of causation and of laws of nature are exposed to decisive objections, and thus that the time has come for empiricists to (...) break with that tradition. -/- The basic goal of this book, therefore, is to set out and defend realistic accounts of those concepts. In the case of causal relations, for example, Tooley maintains that causation is basically a matter of theoretical relations between states of affairs that underlie and explain relative frequencies. He also argues that such an approach avoids the objections that tell against reductionist accounts and that it does so without making causal relations epistemologically inaccessible. (shrink)

Sequence learning is fundamental to a wide range of cognitive functions. Explaining how sequences—and the relations between the elements they comprise—are learned is a fundamental challenge to cognitive science. However, although hundreds of articles addressing this question are published each year, the actual learning mechanisms involved in the learning of sequences are rarely investigated. We present three experiments that seek to examine these mechanisms during a typing task. Experiments 1 and 2 tested learning during typing single letters on each trial. (...) Experiment 3 tested for “chunking” of these letters into “words.” The results of these experiments were used to examine the mechanisms that could best account for them, with a focus on two particular proposals: statistical transitional probability learning and discriminative error-driven learning. Experiments 1 and 2 showed that error-driven learning was a better predictor of response latencies than either n-gram frequencies or transitional probabilities. No evidence for chunking was found in Experiment 3, probably due to interspersing visual cues with the motor response. In addition, learning occurred across a greater distance in Experiment 1 than Experiment 2, suggesting that the greater predictability that comes with increased structure leads to greater learnability. These results shed new light on the mechanism responsible for sequence learning. Despite the widely held assumption that transitional probability learning is essential to this process, the present results suggest instead that the sequences are learned through a process of discriminative learning, involving prediction and feedback from prediction error. (shrink)

Know-it-All Society is about how we form and maintain our political convictions, and the ways in which political ideologies, human psychology and technology conspire to make our society more dogmatic, less intellectually humble and ultimately less democratic.

Different people reason differently, which means that sometimes they reach different conclusions from the same evidence. We maintain that this is not only natural, but rational. In this essay we explore the epistemology of that state of affairs. First we will canvass arguments for and against the claim that rational methods of reasoning must always reach the same conclusions from the same evidence. Then we will consider whether the acknowledgment that people have divergent rational reasoning methods should undermine one’s confidence (...) in one’s own reasoning. Finally we will explore how agents who employ distinct yet equally rational methods of reasoning should respond to interactions with the products of each others’ reasoning. We find that the epistemology of multiple reasoning methods has been misunderstood by a number of authors writing on epistemic permissiveness and peer disagreement. (shrink)

It is widely believed that what distinguishes the social cognition of humans from that of other animals is the belief–desire psychology of four–year–old children and adults (so–called theory of mind). We argue here that this is actually the second ontogenetic step in uniquely human social cognition. The first step is one year old children's understanding of persons as intentional agents, which enables skills of cultural learning and shared intentionality. This initial step is ‘the real thing’ in the sense that it (...) enables young children to participate in cultural activities using shared, perspectival symbols with a conventional/normative/reflective dimension—for example, linguistic communication and pretend play—thus inaugurating children's understanding of things mental. Understanding beliefs and participating in collective intentionality at four years of age—enabling the comprehension of such things as money and marriage—results from several years of engagement with other persons in perspective–shifting and reflective discourse containing propositional attitude constructions. (shrink)

This 1987 book offers a critique of the liberal theory of the state, focusing on a detailed study of cooperation in the absence of the state and of other kinds of coercion. The discussion includes an analysis of collective action and of the Prisoners' Dilemma supergame. It is a revised and expanded edition of the author's classic work of rational choice theory Anarchy and Cooperation, originally published with John Wiley in 1976. The analysis has been recast and developed here to (...) make it more accessible to non-mathematical readers and to provide a more comprehensive and self-contained treatment of the theory of collective action. The book will be of interest to a range of readers in political and social philosophy and in economics. (shrink)

This will be the best way of explaining ‘Paris is the lover of Helen’, that is, ‘Paris loves, and by that very fact [et eo ipso] Helen is loved’. Here, therefore, two propositions have been brought together and abbreviated as one. Or, ‘Paris is a lover, and by that very fact Helen is a loved one’.

The question "Why?" that is deployed in these exchanges evidently bears the "special sense" Elizabeth Anscombe has linked to the concepts of intention and of a reason for action; it is the sort of question "Why?" that asks for what Donald Davidson later called a "rationalization".2 The special character of what is given, in each response, as formulating a reason ── a description, namely, of the agent as actually doing something, and, moreover, as..

This paper asks whether there is a moral virtue of hope, and if so, what it is. The enterprise is motivated by a historical asymmetry, namely that while Christian thinkers have long classed hope as a theological virtue, it has not traditionally been classed as a moral one. But this is puzzling, for hoping well is not confined to the sphere of religion; and consequently we might expect that if the theological virtue is structurally sound, there will be a secular, (...) moral analogue. This paper proposes that there is such an analogue, and that it is closely linked to the everyday notion of “having your priorities straight,” a phenomenon which is naturally understood in terms of the attitude of hope. It turns out that the priorities model provides an abstract way of characterizing a central but underexplored virtue, one which can be developed in secular or theological ways. (shrink)

Begins by explaining then proving a generalized language dependence result similar to Goodman's "grue" problem. I then use this result to cast doubt on the existence of an objective evidential favoring relation (such as "the evidence confirms one hypothesis over another," "the evidence provides more reason to believe one hypothesis over the other," "the evidence justifies one hypothesis over the other," etc.). Once we understand what language dependence tells us about evidential favoring, our options are an implausibly strong conception of (...) the a priori, a hard externalism on which agents are unable to determine what their evidence favors, or a subjectivist view that makes evidential favoring relative to features of the agent. (shrink)

This volume presents a selection of the most influential recent discussions of the crucial metaphysical questions: what is it for one event to cause another? The subject of causation bears on many topics, such as time, explanation, mental states, the laws of nature, and the philosphy of science.

Can self-locating beliefs be relevant to non-self-locating claims? Traditional Bayesian modeling techniques have trouble answering this question because their updating rule fails when applied to situations involving contextsensitivity. This essay develops a fully general framework for modeling stories involving context-sensitive claims. The key innovations are a revised conditionalization rule and a principle relating models of the same story with different modeling languages. The essay then applies the modeling framework to the Sleeping Beauty Problem, showing that when Beauty awakens her degree (...) of belief in heads should be one-third. This demonstrates that it can be rational for an agent who gains only self-locating beliefs between two times to alter her degree of belief in a non-self-locating claim. (shrink)

I propose a theory of domination derived from republican political theory that is in contrast to the neo-republican theory of domination as arbitrary interference and domination as dependence. I suggest that, drawing on of the writings of Machiavelli and Rousseau, we can see two faces of domination that come together to inform social relations. One type of domination is extractive dominance where agents are able to derive surplus benefit from another individual, group, or collective resource, natural or human. Another is (...) what I call constitutive domination where the norms, institutions, and values of the community shape the rationality of subjects to accept forms of power and social relations and collective goals as legitimate forms of authority. Each of these make up two faces of a broader theory of social domination that is more concrete and politically compelling than that put forth by contemporary neo-republican theory. I argue that this understanding of domination should be seen as a kind of ‘radical... (shrink)

My immediate aim in this lecture is to contribute something to the apt characterization of our representation and knowledge of the specifically human life form, as I will put it - and, to some extent, of things ‘human’ more generally. In particular I want to argue against an exaggerated empiricism about such cognition. Meditation on these themes might be pursued as having a kind of interest of its own, an epistemological and in the end metaphysical interest, but my own purpose (...) in the matter is practical-philosophical. I want to employ my theses to make room for a certain range of doctrines in ethical theory and the theory of practical rationality - doctrines, namely, of natural normativity or natural goodness, as we may call them. I am not proposing to attempt a positive argument for any such ‘neo-Aristotelian’ position, but merely to defend such views against certain familiar lines of objection; and even here my aims will be limited, as will be seen. (shrink)

Around 540 million years ago there was a sudden, dramatic adaptive radiation known as the Cambrian Explosion. This event marked the origin of almost all of the phyla (major lineages characterized by fundamental body plans) of animals that would ever live on earth, as well the appearance of many notable features such as rigid skeletons and other hard parts, complex jointed appendages, eyes, and brains. This radical evolutionary event has been a major puzzle for evolutionary biologists since Darwin, and while (...) our understanding of it has recently improved with new fossil finds, richer molecular phylogenies, and better grasp of ecological, evolutionary, and developmental processes generally, unanswered questions remain. In this paper I argue that a basic cognitive toolkit for embodied, object-oriented, spatial cognition (what I call Basic Cognitive Embodiment) is a practical necessity for control of a large, mobile, complexly articulated body in space. This hypothesis allows us to relate the complexification of animal bodies to the complexification of perception, cognition and behavior in a way that can help to fill in gaps in our emerging picture of the Cambrian Explosion, as well as shed light on the deep evolutionary origins of the mind. (shrink)

The Sleeping Beauty Problem attracts so much attention because it connects to a wide variety of unresolved issues in formal epistemology, decision theory, and the philosophy of science. The problem raises unanswered questions concerning relative frequencies, objective chances, the relation between self-locating and non-self-locating information, the relation between self-location and updating, Dutch Books, accuracy arguments, memory loss, indifference principles, the existence of multiple universes, and many-worlds interpretations of quantum mechanics. After stating the problem, this article surveys its connections to all (...) of these areas. (shrink)

Inspired by the work of Wilfrid Sellars, Michael Williams launches an all-out attack on what he calls "phenomenalism," the idea that our knowledge of the world rests on a perceptual or experiential foundation.

Abstract. Richard Feldman’s Uniqueness Thesis holds that “a body of evidence justifies at most one proposition out of a competing set of proposi- tions”. The opposing position, permissivism, allows distinct rational agents to adopt differing attitudes towards a proposition given the same body of evidence. We assess various motivations that have been offered for Uniqueness, including: concerns about achieving consensus, a strong form of evidentialism, worries about epistemically arbitrary influences on belief, a focus on truth-conduciveness, and consequences for peer disagreement. (...) We argue that each of these motivations either misunderstands the commitments of permissivism or is question-begging. Better understanding permissivism makes it a much more plausible position. (shrink)

Evaluative claims and assumptions are ubiquitous in positive psychology. Some will deny this. But such disavowals are belied by the literature. Some will consider the presence of evaluative claims a problem and hope to root them out. But this is a mistake. If positive psychology is to live up to its raison d’être – to be the scientific study of the psychological components of human flourishing or well-being – it must make evaluative claims. Well-being consists in those things that are (...) good for us, that make life go well. Thus, one cannot investigate this topic without making claims about what is good for people and what they have reason to do. It’s time, therefore, to embrace the fact that positive psychology is value-laden. Doing so would benefit the field by allowing for more rigorous theorizing, and – perhaps counterintuitively – increasing the field’s objectivity. (shrink)

I argue that given standard deontic logic, wide-scope rational requirements entail narrow-scope rational requirements. In particular, the widely-embraced Enkratic Principle entails that if a particular combination of attitudes is rationally forbidden, it is also rationally forbidden to believe that that combination of attitudes is required.

Recent discussion of Vogel-style “bootstrapping” scenarios suggests that they provide counterexamples to a wide variety of epistemological theories. Yet it remains unclear why it’s bad for a theory to permit bootstrapping, or even exactly what counts as a bootstrapping case. Going back to Vogel's original bootstrapping example, I note that an agent who could gain justification through the method Vogel describes would have available a “no-lose investigation”: an investigation that can justify a proposition but has no possibility of undermining it. (...) The main suggestion of this article is that an epistemological theory should not permit no-lose investigations. I identify necessary and sufficient conditions for such investigations, then explore epistemological theories that rule them out. If we want to avoid both skepticism and no-lose investigations, we must eschew either Closure or epistemic externalism. (shrink)