Kevin McCain

The Evidence Thesis is the intuitively plausible principle that in order to know that p one must base her belief that p on adequate evidence. Despite the plausibility of this principle, Andrew Moon (2012) has recently argued that the principle is false. Moon’s argument consists of presenting what he takes to be a clear instance of knowledge and arguing that the subject in the case does not have this knowledge on the basis of any evidence. I argue that Moon’s example fails to be a genuine counterexample to the Evidence Thesis.

Phenomenal conservatism is a popular theory of epistemic justification. Despite its popularity and the fact that some think that phenomenal conservatism can provide a complete account of justification, it faces several challenges. Among these challenges are the need to provide accounts of defeaters and inferential justification. Fortunately, there is hope for phenomenal conservatism. Explanationism, the view on which justification is a matter of explanatory considerations, can help phenomenal conservatism with both of these challenges. The resulting view is one that respects the internalist character of phenomenal conservatism and its motivating intuitions while providing an intuitive and elegant account of both inferential justification and the justificatory impact of defeaters.

This book offers a comprehensive and accessible introduction to the epistemology of science. It not only introduces readers to the general epistemological discussion of the nature of knowledge, but also provides key insights into the particular nuances of scientific knowledge. No prior knowledge of philosophy or science is assumed by The Nature of Scientific Knowledge. Nevertheless, the reader is taken on a journey through several core concepts of epistemology and philosophy of science that not only explores the characteristics of the scientific knowledge of individuals but also the way that the development of scientific knowledge is a particularly social endeavor. The topics covered in this book are of keen interest to students of epistemology and philosophy of science as well as science educators interested in the nature of scientific knowledge. In fact, as a result of its clear and engaging approach to understanding scientific knowledge The Nature of Scientific Knowledge is a book that anyone interested in scientific knowledge, knowledge in general, and any of a myriad of related concepts would be well advised to study closely.

It is commonplace to distinguish between propositional justification (having good reasons for believing p) and doxastic justification (believing p on the basis of those good reasons).One necessary requirement for bridging the gap between S’s merely having propositional justification that p and S’s having doxastic justification that p is that S base her belief that p on her reasons (propositional justification).A plausible suggestion for what it takes for S’s belief to be based on her reasons is that her reasons must contribute causally to S’s having that belief. Though this suggestion is plausible, causal accounts of the basing relation that have been proposed have not fared well. In particular, cases involving causal deviancy and cases involving over-determination have posed serious problems for causal accounts of the basing relation. Although previous causal accounts of the basing relation seem to fall before these problems, it is possible to construct an acceptable causal account of the basing relation. That is, it is possible to construct a causal account of the basing relation that not only fits our intuitions about doxastic justification in general, but also is not susceptible to the problems posed by causal deviancy and causal over-determination. The interventionist account of causation provides the tools for constructing such an account. My aim is to make use of the insights of the interventionist account of causation to develop and defend an adequate causal account of the basing relation.

Evolutionary theory is a paradigmatic example of a well-supported scientific theory. In this chapter we consider a number of objections to evolutionary theory, and show how responding to these objections reveals aspects of the way in which scientific theories are supported by evidence. Teaching these objections can therefore serve two pedagogical aims: students can learn the right way to respond to some popular arguments against evolutionary theory, and they can learn some basic features of the structure of scientific theories and evidence.

The New Evil Demon Problem is often seen as a serious objection to externalist theories of justification. In fact, some internalists think it is a decisive counterexample to externalism. Recently, Moon has argued that internalists face their own New Evil Demon Problem. According to Moon, it is possible for a demon to remove one’s unaccessed mental states while leaving the justificatory status of her accessed mental states unaffected. Since this is contrary to the claims of many forms of internalism, Moon maintains that his New Evil Demon Problem for Internalism shows that internalists face a problem that is just as troubling as the original NEDP. I argue that moderate internalists have nothing to fear from Moon’s demon

William Roche and Elliott Sober argue that explanatoriness is evidentially irrelevant. This conclusion is surprising since it conflicts with a plausible assumption—the fact that a hypothesis best explains a given set of data is evidence that the hypothesis is true. We argue that Roche and Sober's screening-off argument fails to account for a key aspect of evidential strength: the weight of a body of evidence. The weight of a body of evidence affects the resiliency of probabilities in the light of new evidence. Thus, Roche and Sober are mistaken. Explanatoriness is evidentially relevant

According to Roderick Chisholm, there are three ways of responding to the Problem of the Criterion and they all leave something to be desired. Michael DePaul, Paul Moser, and Earl Conee have each proposed variations of a fourth way of responding to this problem that rely on reflective equilibrium. We argue that these four options for responding to the Problem of the Criterion leave one with a tough choice: accept one of the three that Chisholm describes or DePaul’s reflective equilibrium approach and beg the question or accept a reflective equilibrium response of the sort Conee and Moser propose and embrace epistemic circularity.

Explanationists about epistemic justification hold that justification depends upon explanatory considerations. After a bit of a lull, there has recently been a resurgence of defenses of such views. Despite the plausibility of these defenses, explanationism still faces challenges. Recently, T. Ryan Byerly and Kraig Martin have argued that explanationist views fail to provide either necessary or sufficient conditions for epistemic justification. I argue that Byerly and Martin are mistaken on both accounts.

Although several important methodologies implicitly assume the truth of epistemic conservatism, the view that holding a belief confers some measure of justification on the belief, recent criticisms have led some to conclude that epistemic conservatism is an implausible view. That conclusion is mistaken. In this article, I propose a new formulation of epistemic conservatism that is not susceptible to the criticisms leveled at earlier formulations of epistemic conservatism. In addition to withstanding these criticisms, this formulation of epistemic conservatism has several benefits. First, this formulation has the benefits of earlier formulations of epistemic conservatism, that is to say it makes sense of our intuitions about justification in regard to both memory beliefs and beliefs for which we have forgotten our evidence. Second, it provides a good way of responding to the skeptic’s challenge concerning the possibility of possessing knowledge of the external world posed by the Alternative Hypotheses argument. Third, it provides responses to both forms of a new skeptical problem plaguing basic knowledge structure theories, the Problem of Easy Knowledge formulated by Stewart Cohen. I argue that given the many benefits of this formulation of epistemic conservatism and the fact that it is not vulnerable to the criticisms that undermine earlier formulations of epistemic conservatism, this formulation of epistemic conservatism is a plausible view to maintain.

Recently, Dan O’Brien has argued that there are situations in which a hearer can gain testimonial knowledge from a speaker who is lying. In order to make his case, O’Brien presents two examples where a speaker lies to a hearer, but supposedly the hearer comes to have testimonial knowledge on the basis of the lying speaker’s testimony. O’Brien claims that his examples demonstrate that lies can be used to pass on knowledge in a non-inferential fashion. I argue that O’Brien is mistaken. More specifically, I argue that the hearer’s belief in the second example that O’Brien depicts fails to meet two plausible conditions for knowledge. First, the hearer’s belief fails to satisfy the requirements of the epistemic basing relation. Second, the hearer’s belief is not safe

James Woodward’s Making Things Happen presents the most fully developed version of a manipulability theory of causation. Although the ‘interventionist’account of causation that Woodward defends in Making Things Happen has many admirable qualities, Michael Strevens argues that it has a fatal flaw. Strevens maintains that Woodward’s interventionist account of causation renders facts about causation relative to an individual’s perspective. In response to this charge, Woodward claims that although on his account X might be a relativized cause of Y relative to some perspective, this does not lead to the problematic relativity that Strevens claims. Roughly, Woodward argues this is so because if X is a relativized cause of Y with respect to some perspective, then X is a cause of Y simpliciter. So, the truth of whether X is a cause of Y is not relative to one’s perspective. Strevens counters by arguing that Woodward’s response fails because relativized causation is not monotonic. In this paper I argue that Strevens’ argument that relativized causation is not monotonic is unsound.

Predictivism, the thesis that all things being equal a hypothesis that predicts a piece of evidence is better supported by that evidence than a hypothesis that only accommodates that evidence, comes in strong and weak forms. Interestingly, weak predictivism, which is widely accepted, can be used to formulate a persuasive argument against some forms of external world scepticism. In this article I formulate this predictivist argument and I explain why it deserves serious consideration despite the fact that it only succeeds as a response to some forms of external world scepticism

According to Roderick Chisholm, there are three ways of responding to the Problem of the Criterion and they all leave something to be desired. Michael DePaul, Paul Moser, and Earl Conee have each proposed variations of a fourth way of responding to this problem that rely on reflective equilibrium. We argue that these four options for responding to the Problem of the Criterion leave one with a tough choice: accept one of the three that Chisholm describes or DePaul’s reflective equilibrium approach and beg the question or accept a reflective equilibrium response of the sort Conee and Moser propose and embrace epistemic circularity.