Yibai Liu

Applied philosophy has been a growing area of research for the last 40 years. Until now, however, almost all of this research has been centered around the field of ethics. A Companion to Applied Philosophy breaks new ground, demonstrating that all areasof philosophy, including epistemology, metaphysics, philosophy of science, and philosophy of mind, can be applied, and are relevant to questions of everyday life. This perennial topic in philosophy provides an overview of these various applied philosophy developments, highlighting similarities and differences between various areas of applied philosophy, and examining the very nature of this topic. It is an area to which many of the towering figures in the history of philosophy have contributed, and this timely Companion demonstrates how various historical contributions are actually contributions within applied philosophy, even if they are not traditionally seen as such. The Companion contains 42 essays covering major areas of philosophy; the articles themselves are all original contributions to the literature and represent the state of the art on this topic, as well as offering a map to the current debates.

Humility is a vital aspect of political discussion, social media and self-help, whilst recent empirical research has linked humility to improved well-being, open-mindedness and increased accuracy in assessing persuasive messages. It is also a topic central to research and discussion in philosophy, applied ethics and religious studies. The Routledge Handbook of Philosophy of Humility is the first collection to present a comprehensive overview the philosophy of humility, whilst also covering important interdisciplinary topics. Comprising forty-one chapters by an international team of contributors, the Handbook is divided into seven parts: Theories of Humility The Ethics of Humility The Politics of Humility Humility in Religious Thought The Epistemology of Humility The Psychology of Humility Humility: Applications to the Social World. Essential reading for students and researchers in ethics, epistemology, political philosophy, and philosophy of mind and psychology, this Handbook will also be extremely useful for those in related disciplines such as psychology, religious studies and law.

Despite the recent backlash against epistemic consequentialism, an explicit systematic alternative has yet to emerge. This paper articulates and defends a novel alternative, Epistemic Kantianism, which rests on a requirement of respect for the truth. §1 tackles some preliminaries concerning the proper formulation of the epistemic consequentialism / non-consequentialism divide, explains where Epistemic Kantianism falls in the dialectical landscape, and shows how it can capture what seems attractive about epistemic consequentialism while yielding predictions that are harder for the latter to secure in a principled way. §2 presents Epistemic Kantianism. §3 argues that it is uniquely poised to satisfy the desiderata set out in §1 on an ideal theory of epistemic justification. §4 gives three further arguments, suggesting that it (i) best explains the objective normative significance of the subject's perspective in epistemology, (ii) follows from the kind of axiology needed to solve the swamping problem together with modest assumptions about the relation between the evaluative and the deontic, and (iii) illuminates certain asymmetries in epistemic value and obligation. §5 takes stock and reassesses the score in the debate.

This paper looks at whether it is possible to unify the requirements of rationality with the demands of normative reasons. It might seem impossible to do because one depends upon the agent’s perspective and the other upon features of the situation. Enter Reasons Perspectivism. Reasons perspectivists think they can show that rationality does consist in responding correctly to reasons by placing epistemic constraints on these reasons. They think that if normative reasons are subject to the right epistemic constraints, rational requirements will correspond to the demands generated by normative reasons. While this proposal is prima facie plausible, it cannot ultimately unify reasons and rationality. There is no epistemic constraint that can do what reasons perspectivists would need it to do. Some constraints are too strict. The rest are too slack. This points to a general problem with the reasons-first program. Once we recognize that the agent’s epistemic position helps determine what she should do, we have to reject the idea that the features of the agent’s situation can help determine what we should do. Either rationality crowds out reasons and their demands or the reasons will make unreasonable demands.

The purpose of this paper is to challenge what is often called the “Uniqueness” thesis. According to this thesis, given one’s total evidence, there is a unique rational doxastic attitude that one can take to any proposition. It is sensible for defenders of Uniqueness to commit to an accompanying principle that: when some agent A has equal epistemic reason both to believe that p and to believe that not p, the unique epistemically rational doxastic attitude for A to adopt with respect to whether p is the suspension of judgment. In this paper, I offer a case wherein the agent has equal epistemic reason both to believe that p and to believe that not p, but the agent is not epistemically required to suspend judgment about whether p. Furthermore, the case is such that there seems to be no uniquely rational attitude for the agent to adopt.

This paper discusses two senses in which a hypothesis may be said to unify evidence. One is the ability of the hypothesis to increase the mutual information of a set of evidence statements; the other is the ability of the hypothesis to explain commonalities in observed phenomena by positing a common origin for them. On Bayesian updating, it is only mutual information unification that contributes to the incremental support of a hypothesis by the evidence unified. This poses a challenge for the view that explanation is a confirmatory virtue that contributes to such incremental support; its advocates must ground it in some relevant difference between humans and a Bayesian agent.

There is something puzzling about statistical evidence. One place this manifests is in the law, where courts are reluctant to base affirmative verdicts on evidence that is purely statistical, in spite of the fact that it is perfectly capable of meeting the standards of proof enshrined in legal doctrine. After surveying some proposed explanations for this, I shall outline a new approach – one that makes use of a notion of normalcy that is distinct from the idea of statistical frequency. The puzzle is not, however, merely a legal one. Our unwillingness to base beliefs on statistical evidence is by no means limited to the courtroom, and is at odds with almost every general principle that epistemologists have proposed as to how we ought to manage our beliefs.

There are at least two threads in our thought and talk about rationality, both practical and theoretical. In one sense, to be rational is to respond correctly to the reasons one has. Call this substantive rationality. In another sense, to be rational is to be coherent, or to have the right structural relations hold between one’s mental states, independently of whether those attitudes are justified. Call this structural rationality. According to the standard view, structural rationality is associated with a distinctive set of requirements that mandate or prohibit certain combinations of attitudes, and it’s in virtue of violating these requirements that incoherent agents are irrational. I think the standard view is mistaken. The goal of this paper is to explain why, and to motivate an alternative account: rather than corresponding to a set of law-like requirements, structural rationality should be seen as corresponding to a distinctive kind of pro tanto rational pressure—i.e. something that comes in degrees, having both magnitude and direction. Something similar is standardly assumed to be true of substantive rationality. On the resulting picture, each dimension of rational evaluation is associated with a distinct kind of rational pressure—substantive rationality with (what I call) justificatory pressure and structural rationality with attitudinal pressure. The former is generated by one’s reasons while the latter is generated by one’s attitudes. Requirements turn out to be at best a footnote in the theory of rationality.

We often have reason to doubt our own ability to form rational beliefs, or to doubt that some particular belief of ours is rational. Perhaps we learn that a trusted friend disagrees with us about what our shared evidence supports. Or perhaps we learn that our beliefs have been afflicted by motivated reasoning or other cognitive biases. These are examples of higher-order evidence. While it may seem plausible that higher-order evidence should impact our beliefs, it is less clear how and why. Normally, when evidence impacts our beliefs, it does so by virtue of speaking for or against the truth of theirs contents. But higher-order evidence does not directly concern the contents of the beliefs that they impact. In recent years, philosophers have become increasingly aware of the need to understand the nature and normative role of higher-order evidence. This is partly due to the pervasiveness of higher-order evidence in human life. But it has also become clear that higher-order evidence plays a central role in many epistemological debates, spanning from traditional discussions of internalism/externalism about epistemic justification to more recent discussions of peer disagreement and epistemic akrasia. This volume brings together, for the first time, a distinguished group of leading and up-and-coming epistemologists to explore a range of issues about higher-order evidence.

Evidence is one of the most fundamental notions in the field of epistemology and is emerging as a major topic across academic disciplines. The practice of every academic discipline consists largely in providing evidence for key theses and The Routledge Handbook of Philosophy of the Philosophy of Evidence, the first collection of its kind, is an outstanding reference source to the key topics, problems and debates in this exciting subject. Comprising over forty chapters by a team of international contributors the Handbook is divided into six parts: Ontology of evidence Sources of evidence Evidence and normativity Evidence and probability Social epistemology of evidence Evidence in the disciplines. Within these sections central issues, debates and problems are examined. Questions covered include: What is evidence? What is the relationship between knowledge and evidence? Is a pluralism of evidence possible? What other sources of evidence are there in addition to perception? Is what a person ought to believe completely fixed by the totality of evidence they have, or does it also depend on other factors like practical interests? Can evidential force be measured in any well-behaved way? How do socially created biases - for instance, gender biases - affect evidence-gathering? How is evidence relevant within different academic disciplines? The Routledge Handbook of Philosophy of the Philosophy of Evidence is essential reading for students and researchers in philosophy of science and epistemology and related disciplines such as law, religion, history and the social sciences.

The paper is an opinionated tour of the literature on the reasons for which we hold beliefs and other doxastic attitudes, which I call ‘operative epistemic reasons’. After drawing some distinctions in §1, I begin in §2 by discussing the ontology of operative epistemic reasons, assessing arguments for and against the view that they are mental states. I recommend a pluralist non-mentalist view that takes seriously the variety of operative epistemic reasons ascriptions and allows these reasons to be both propositions and truth-making facts. In §3, I turn to consider what it takes for a consideration to be an operative epistemic reason, examining three conditions – the representational, treating, and explanatory conditions – that have been proposed. I offer a novel view about the explanatory condition. In §4, I discuss the special case of inferential operative reasons and examine attempts to understand them in terms of rule-following, sketching a competence-based spinoff of dispositionalism. Finally, in §5, I consider whether there are non-inferential operative reasons, observing that one needn't countenance them to be a foundationalist but then developing a view about what they are and how they do and don't differ from inferential reasons.

This paper is an opinionated guide to the literature on normative epistemic reasons. After making some distinctions in §1, I begin in §2 by discussing the ontology of normative epistemic reasons, assessing arguments for and against the view that they are mental states, and concluding that they are not mental states. In §3, I examine the distinction between normative epistemic reasons there are and normative epistemic reasons we possess. I offer a novel account of this distinction and argue that we in fact ought to acknowledge a threefold distinction between objective, possessed, and apparent normative epistemic reasons. In §4, I discuss the question of which normative reasons for doxastic attitudes are the epistemic ones, evaluating reasons against a simple evidentialist answer. Finally, in §5, I look at the role of reasons in epistemology, considering challenges to viewing reasons as the building blocks of epistemic normativity and maintaining that the challenges recommend a novel bi-level epistemology rather than a marginalization of reasons in epistemology.

In a recent series of papers, Jane Friedman argues that suspended judgment is a sui generis first-order attitude, with a question as its content. In this paper, I offer a critique of Friedman’s project. I begin by responding to her arguments against reductive higher-order propositional accounts of suspended judgment, and thus undercut the negative case for her own view. Further, I raise worries about the details of her positive account, and in particular about her claim that one suspends judgment about some matter if and only if one inquires into this matter. Subsequently, I use conclusions drawn from the preceding discussion to offer a tentative account: S suspends judgment about p iff S believes that she neither believes nor disbelieves that p, S neither believes nor disbelieves that p, and S intends to judge that p or not-p.

This open access book – as the title suggests – explores some of the historical roots and epistemological ramifications of perspectivism. Perspectivism has recently emerged in philosophy of science as an interesting new position in the debate between scientific realism and anti-realism. But there is a lot more to perspectivism than discussions in philosophy of science so far have suggested. Perspectivism is a much broader view that emphasizes how our knowledge is situated; it is always from a human vantage point. This edited collection brings together a diverse team of established and early career scholars across a variety of fields. The resulting nine essays trace some of the seminal ideas of perspectivism back to Kant, Nietzsche, the American Pragmatists, and Putnam, while the second part of the book tackles issues concerning the relation between perspectivism, relativism, and standpoint theories, and the implications of perspectivism for epistemological debates about veritism, epistemic normativity and the foundations of human knowledge.

Normative reasons for action are facts or considerations that contribute to the justification of an action. Sometimes, normative reasons for action conflict: one reason may favor doing something, while another may favor not doing it. These conflicts can be so radical that it seems difficult, if not impossible, to judge which reason should ultimately guide one’s actions. According to a theory of practical rationality known as reasons pluralism, there are some radical cases of conflict among normative reasons for action in which there can be no fact of the matter about what one ought to do. This is because normative reasons fall into a plurality of types, and normative reasons of different types are incommensurable with one another. However, reasons pluralism is compatible with a principle that would enable us to judge when a normative reason of one type overrides a normative reason of another type. I will argue that this “Override Principle” is a facet of practical wisdom—an intellectual virtue. Practical wisdom, as Aristotle construed it, involves the ability to order one’s ends into a coherent system that allows for the attainment of a good life. The Override Principle is sure to be one criterion by which those endowed with practical wisdom would order their ends.

One way of discerning what sort of control we have over our mental lives is to look at cases where that control is not exercised. This is one reason why philosophers have taken an interest in the phenomenon of akrasia, in an agent's ability to do, freely and deliberately, something that they judge they ought not to do. Akrasia constitutes a failure of control but not an absence of control. The akratic agent is not a compulsive; an akratic agent has the ability to control their action, to make it conform to their judgement, but they fail to exercise that ability. They freely and deliberately give in to temptation

In this paper, I present a puzzle about epistemic rationality. It seems plausible that it should be rational to believe a proposition if you have sufficient evidential support for it. It seems plausible that it rationality requires you to conform to the categorical requirements of rationality. It also seems plausible that our first-order attitudes ought to mesh with our higher-order attitudes. It seems unfortunate that we cannot accept all three claims about rationality. I will present three ways of trying to resolve this tension and argue that the best way to do this is to reject the idea that strong evidential support is the stuff rationality is made of. In the course of doing this, I shall argue that there is a special class of propositions about the requirements of rationality that we cannot make rational mistakes about and explain how this can be.

I explore how rational belief and rational credence relate to evidence. I begin by looking at three cases where rational belief and credence seem to respond differently to evidence: cases of naked statistical evidence, lotteries, and hedged assertions. I consider an explanation for these cases, namely, that one ought not form beliefs on the basis of statistical evidence alone, and raise worries for this view. Then, I suggest another view that explains how belief and credence relate to evidence. My view focuses on the possibilities that the evidence makes salient. I argue that this makes better sense of the difference between rational credence and rational belief than other accounts.

In this paper, I respond to recent attempts by philosophers to deny the existence of something that is both real and significant: reasonable disagreements between epistemic peers. In their arguments against the possibility of such disagreements, skeptical philosophers typically invoke one or more of the following: indifference reasoning , equal weight principles , and uniqueness theses . I take up each of these in turn, finding ample reason to resist them. The arguments for indifference reasoning and equal weight principles tend to overlook the possibility of a certain kind of agnostic credal state which I call deep agnosticism , the possibility of which derails the arguments. The arguments for uniqueness theses tend to invoke a flawed understanding of the evidential support relation. When these problems and misunderstandings are brought into the light and corrected, the threat to reasonable disagreement vanishes.

It is common in recent epistemology to distinguish different senses, or conceptions, of epistemic justification. The proposed oppositions include the objective/subjective, internalist/externalist, regulative/nonregulative, resource-relative/resource-independent, personal/verific, and deontological/evaluative conceptions of justification. In some of these cases, writers regard both members of the contrasting pair as legitimate; in other cases only one member. In this paper I want to propose another contrasting pair of conceptions of justification, and hold that both are defensible and legitimate. The contrast will then be used to construct a modified version of reliabilism, one which handles certain problem cases more naturally than my previous versions of reliabilism.

One of the most important research programmes in contemporary cognitive science is that of extended cognition, whereby features of a subject's cognitive environment can in certain conditions become constituent parts of the cognitive process itself. The aim of this volume is to explore the epistemological ramifications of this idea.... The first part of the volume explores foundational issues with regard to an extended epistemology, including from a critical perspective. The second part of the volume examines the applications of extended epistemology and the new theoretical directions that it might take us. These include its ethical ramifications, its import to the epistemology of education and emerging digital technologies, and how this idea might dovetail with certain themes in Chinese philosophy.

The Uniqueness Thesis holds, roughly speaking, that there is a unique rational response to any particular body of evidence. We first sketch some varieties of Uniqueness that appear in the literature. We then discuss some popular views that conflict with Uniqueness and others that require Uniqueness to be true. We then examine some arguments that have been presented in its favor and discuss why permissivists find them unconvincing. Last, we present some purported counterexamples that have been raised against Uniqueness and discuss some possible reasons why proponents of Uniqueness might find these similarly unconvincing

The uniqueness thesis states that for any body of evidence and any proposition, there is at most one rational doxastic attitude that an epistemic agent can take toward that proposition. Permissivism is the denial of uniqueness. Perhaps the most popular form of permissivism is what I call the Epistemic Standard View, since it relies on the concept of epistemic standards. Roughly speaking, epistemic standards encode particular ways of responding to any possible body of evidence. Since different epistemic standards may rationalize different doxastic states on the same body of evidence, this view gives us a form of permissivism if different agents can have different epistemic standards. Defenders of the ESV, however, have not paid sufficient attention to what it means to have a particular epistemic standard. I argue that any theory of epistemic standard possession must satisfy two criteria to adequately address the broader needs of the ESV. The first criterion is the normative criterion: a theory of standard-possession should explain why agents are rationally required to form beliefs in accordance with their own epistemic standard, rather than any other standard. The second criterion is the applicability criterion: a theory of standard-possession should rule that agents have the epistemic standards we intuitively think they have. I then argue that no extant theories of standard-possession can satisfy both these criteria. I conclude by diagnosing why these criteria are so hard to jointly satisfy. Defenders of the ESV are thus left with a serious obstacle to forming a complete and plausible version of their view.

Is epistemic inconsistency a mere symptom of having violated other requirements of rationality—notably, reasons-responsiveness requirements? Or is inconsistency irrational on its own? This question has important implications for the debate on the normativity of epistemic rationality. In this paper, I defend a new account of the explanatory role of the requirement of epistemic consistency. Roughly, I will argue that, in cases where an epistemically rational agent is permitted to believe P and also permitted to disbelieve P, the consistency requirement plays a distinct explanatory role. I will also argue that such a type of permissiveness is a live possibility when it comes to rational epistemic standards.

In recent years, permissivism—the claim that a body of evidence can rationalize more than one response—has enjoyed somewhat of a revival. But it is once again being threatened, this time by a host of new and interesting arguments that, at their core, are challenging the permissivist to explain why rationality matters. A version of the challenge that I am especially interested in is this: if permissivism is true, why should we expect the rational credences to be more accurate than the irrational ones? My aim is to turn this challenge on its head and argue that, actually, those who deny permissivism will have a harder time responding to such a challenge than those who accept it.