This paper provides a reinterpretation of some of the most influential skeptical arguments, Agrippa’s trilemma, meta-regress arguments, and Cartesian external world skepticism. These skeptical arguments are reasonably regarded as unsound arguments about the extent of our knowledge. However, reinterpretations of these arguments tell us something significant about the preconditions and limits of persuasive argumentation. These results contribute to the ongoing debates about the nature and resolvability of deep disagreement. The variety of skeptical arguments shows (...) that we must distinguish different types of deep disagreement. Moreover, the reinterpretation of skeptical arguments elucidates that deep disagreement cannot be resolved via argumentation. (shrink)

Climate change has become one of the most pressing problems that can threaten the existence and development of humans around the globe. Almost all climate scientists have agreed that climate change is happening and is caused mainly by greenhouse gas emissions induced by anthropogenic activities. However, some groups still deny this fact or do not believe that climate change results from human activities. This article examines climate change denialism and its skeptical arguments, as well as the roles of scientists (...) and science communication in addressing the issues. Through this article, we call for the active participation of scientists in science communication activities with the public, the initiation of new science communication sectors specified for climate change, and more attention to social sciences and humanities in addressing climate change issues. (shrink)

Donald Davidson contributed more deeply to our understanding of language, thought, and reality than perhaps any other recent philosopher. His discussions of skepticism are sometimes seen as peripheral to those contributions. As I read him, Davidson argued against three skeptical worries. First, beliefs are true or false relative to a conceptual scheme. Second, beliefs generally are false. Third, other minds and an external world do not exist. Call those worries ‘conceptual relativism’, ‘falsidicalism’, and ‘solipsism’, respectively. I investigate how Davidson’s (...) class='Hi'>arguments are connected. I then show that those connections are so systematic that Davidson ultimately offers a single, master argument with two premises. Premise one is that I think. Premise two is an application of his account of radical interpretation. Focusing on the systematicity of Davidson’s anti-skeptical arguments demonstrates that discussions of skepticism were more central to his views than often appreciated and shines fresh light on his project overall. (shrink)

In this paper a candidate for a rational reconstruction of skeptical arguments is presented and defended against a competitor called ‘The Argument from Ignorance’. On the basis of this defense, Michael Williams’ claims that foundationalism and epistemological realism serve as presuppositions for skepticism are criticized. It is argued that rejecting these two theses, as his version of contextualism does, is not sufficient for answering the skeptical challenge.

A traditional diagnosis of the error in the Cartesian skeptical arguments holds that they exploit our tendencies to take a representationalist view of perception. Thinking (perhaps not too clearly) that we perceive only our own sensory states, it seems to us that our perceptual beliefs about physical objects must be justified qua explanations of those sensory states. Such justification requires us to have reasons to reject rival explanations, such as the skeptical hypotheses, which we lack. However, those who adopt (...) the direct realist view of perception still find these arguments plausible, although, according to this diagnosis, they shouldn't. To avoid this objection, I argue that the Cartesian skeptical arguments exploit, not our representationalist tendencies, but our habits for evaluating causal explanatory justifications. (shrink)

This book, first published in 2000, is about the nature of skeptical arguments and their role in philosophical inquiry. John Greco delineates three main theses: that a number of historically prominent skeptical arguments make no obvious mistake, and therefore cannot be easily dismissed; that the analysis of skeptical arguments is philosophically useful and important, and should therefore have a central place in the methodology of philosophy; and that taking skeptical arguments seriously requires us to adopt an (...) externalist, reliabilist epistemology. Greco argues that the importance of skeptical arguments is methodological. It is further argued that taking skeptical arguments seriously requires us to adopt a version of 'virtue epistemology', or a theory of knowledge that makes intellectual virtue central in the analysis of knowledge. The above methodology has consequences for moral and religious epistemology; in particular, a theory of moral perception is defended. (shrink)

This essay deals with a selected part of an epistemological controversy provided by Tūsī in response to the skeptical arguments reported by Rāzī that is related to what might be called "intellectual skepticism," or skepticism regarding the judgments of the intellect, particularly in connection with self-evident principles. It will be shown that Rāzī has cited and exposed a position that seems to be no less than a medieval version of empiricism. Tūsī, in contrast, has presented us with a position (...) that rejects such empiricism. The comparative aim of this essay is to draw attention to some similarities as well as some points of divergence between the kind of skeptical debate we are focusing on here, and some relevant epistemological discussions in the later traditions in the West. ". (shrink)

In a series of recent papers, two of which appeared in this journal, a group of philosophers, physicists, and climate scientists have argued that something they call the `hawkmoth effect' poses insurmountable difficulties for those who would use non-linear models, including climate simulation models, to make quantitative predictions or to produce `decision-relevant probabilites.' Such a claim, if it were true, would undermine much of climate science, among other things. Here, we examine the two lines of argument the group has used (...) to support their claims. The first comes from a set of results in dynamical systems theory associated with the concept of `structural stability.' The second relies on a mathematical demonstration of their own, using the logistic equation, that they present using a hypothetical scenario involving two apprentices of Laplace's omniscient demon. We prove two theorems that are relevant to their claims, and conclude that both of these lines of argument fail. There is nothing out there that comes close to matching the charac. (shrink)

Over the last decade there have been various attempts to use empirical data about people’s dispositions to choose to undermine various moral positions by arguing that our judgements about what to do are unreliable. Usually they are directed at non-consequentialists by consequentialists, but they have also been directed at all moral theories by skeptics about morality. Walter Sinnott-Armstrong has been one of the leading proponents of such general skepticism. He has argued that empirical results particularly undermine intuitionist moral epistemology. This (...) paper is an attempt to look at what intuitionists should say in response. Consider the following argument : Regress (R1) If any person S is ever justified in believing a normative claim that p then S must be able to infer p from other beliefs of S. (shrink)

John Greco’s Putting Skeptics in Their Place is an important book. Greco persuasively argues that the best skeptical arguments cannot be easily dismissed and should not be ignored. These arguments cannot be easily dismissed because they defend important conclusions and make no obvious mistake. The arguments should not be ignored because their proper analysis reveals much about central philosophical notions such as knowledge and evidence. While defending these conclusions Greco offers sophisticated metaepistemological and metaphilosophical reflections. Philosophers properly (...) attending to the strongest skeptical arguments will, according to Greco, find themselves heading in the direction of a virtue-based version of reliabilism. Greco defends this general type of theory and outlines the major components of his preferred version of the theory. Greco stops short of defending a fully precise account of knowledge, but he offers a spirited defense of his claim that such a theory should fall somewhere in the family of virtue-based reliabilist theories, a type of theory that Greco calls “agent reliabilism.” Greco concludes with a brief discussion of moral and religious epistemology in which he applies some of the insights gained in his exploration and defense of agent reliabilism. (shrink)

The author discusses the mode of introduction of religious testimonial knowledge as a response to skepticism. It is argued that Professor Greco's Answer to The Argumentfrom Peer Disagreement (Part Three; Application to the three skeptical arguments) requires accepting the thesis that has the same conceptual grounding as the skeptical statements about the impossibility to share any belief. Taking into account this common grounding, it is desirable to explain the statement “A major motivation for anti-skepticism about testimony is anti-skepticism in (...) general" (Part Two). The theory of religious testimonial knowledge uses the statement, which can be grounded by accepting the Mental Holism. However, the Mental Holism is also a possible grounding for some skeptical theses. Thus, a philosopher who assumes religious testimonial knowledge takes not only an anti-skeptical position, but also can take a “proto-skeptical" position. (shrink)

SummaryA familiar sort of argument for skepticism about the external world appeals to the evidential similarity between what is presumed to be the normal case and the case where one is a brain in a vat . An argument from Putnam has been taken by many to provide an a priori refutation of this sort of skeptical argument. The question I propose to address in this paper is whether Putnam's argument affords us an a priori refutation of skeptical arguments (...) that appeal to the claim that one does not know that one is not a BIV. I will develop a negative answer to this question along two related fronts. Along the first front I defend against new criticisms the common position that the externalism on which Putnam's argument is based entails skepticism about the meanings of sentences in our language and the contents of our thoughts. I do not take this to be a refutation of externalism or externalist arguments; rather, I see this as a motivation to locate the difficulty with arguments for externalism. But if externalism is abandoned, of course, the anti‐skeptical argument it has widely been taken to support must be abandoned along with it. I will argue, however, that this is not a significant loss, because along a second front I will argue that externalism cannot be given a priori justification; it is therefore ill‐suited to ground an a priori refutation of BIV skepticism anyway. (shrink)

In section 12 of the Enquiry concerning Human Understanding, Hume presents several skeptical arguments, including "popular" and "philosophical" objections to inductive reasoning. I point out a puzzling aspect of Hume's treatment of these two kinds of objection, and I suggest a way to deal with the puzzle. I then examine the roles of both kinds of objection in leading to "mitigated" skepticism. In particular, Hume claims that the philosophical objection can lead to limiting investigation to matters of common life; (...) but several philosophers have noted that this objection, far from leading to this result, seems to be inconsistent with it. I examine attempts to establish consistency, and I suggest a way to understand how the philosophical objection, along with the popular objections, can indeed provide reasons for mitigated skepticism. (shrink)

Various evangelists of the sixteenth to nineteenth centuries are credited with having asked some version of the question “Why must the Devil have all the good tunes?” If we were to substitute “externalists” for the Devil and “books” for tunes, the question would be a good one to ask about recent work on skepticism. Greco’s book, like Michael Williams’s penetrating Unnatural Doubts, is both a defense of a form of externalism and one of the finest books on skepticism of recent (...) vintage. It seems that on all sides epistemologists are coming to see that dealing with skeptical problems is not only necessary but also philosophically rewarding. In this matter I am in complete agreement with both Greco and Williams, and Greco’s book, like Williams’s, may serve the cause of bringing new converts around to our way of seeing things. (shrink)

In a recent exchange with prominent skeptical theists, Paul Draper has argued that skeptical theism bears no relevance to Humean versions of the argument from suffering. His argument rests, however, on a particular way of construing epistemically rational updating procedures that is not adopted by all forms of skeptical theism. In particular, a perspectival variety of skeptical theism, I argue, is relevant to his Humean arguments. I then generalize this result and explain how any argument from evil employing probabilistic (...) premises is similarly threatened. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:HUME'S SCEPTICAL ARGUMENT AGAINST REASON In the section of the Treatise entitled Of scepticism with regard to reason Kume considers the mind as reflecting upon its own activities, monitors them as it were, and then adjusts them in accordance with certain principles and strategies. ^ What it discovers is that in drawing inferences, the mind sometimes errs. In the light of this knowledge, and in accordance with rational (...) principles of epistemic probabilities, it adjusts its response to any inference it makes from one of certainty to one with epistemic probability of a degree somewhat less than certainty. But this rational adjustment is itself the consequence of an inference, which will be subject to the same qualifications. By repeating this process, it seems that all certainty reduces to probability and all probability to zero. Hume's argument begins this way: Our reason must be consider 'd as a kind of cause, of which truth is the natural effect; but such-a-one as by _ the irruption of other causes, and by the inconstancy of our mental powers, may frequently be prevented. By this means all knowledge degenerates into probability ; and this probability is greater or less, according to our experience of the veracity or deceitfulness of our understanding, and according to the simplicity or intricacy of the question. 2 It is important to be clear on the logical structure of this argument. Consider an actual case of inference. This produces a state of belief or affirmation. Hume does not say that the inference does not produce truth, i.e., a true belief. But there is the possibility it does not. Nor is this a mere logical possibility. One can form the hypothesis about causes that this process of reasoning was in fact one which introduced an 91. element of error. One does not know that this hypothesis is true. But one does know that there is a certain probability that this causal hypothesis is true; as Hume puts it, it may frequently be true. Knowing that we have reasoned poorly sometimes (though not always) in the past, the hypothesis that we have on this occasion reasoned poorly has a certain probability, and we know this even though we have not verified the hypothesis for this particular occasion. On the basis of this unverified but nonetheless somewhat probable causal hypothesis we must as a matter of reason reduce the probability we attach to the belief or affirmation that was produced by the original inference. This reduction of probability is itself a matter of reasoning, however. Therefore about it, also, one can form the hypothesis that it is erroneous, and that the probability of the original affirmation was not reduced sufficiently. On the basis of this new hypothesis we must as a matter of reason reduce still further the probability of the first affirmation. And so on: as I reflect upon my use of reason, all the rules of logic require a continual diminution, and at last a total extinction of belief and evidence. (T183) The result here of the mind applying to its own activities what it discovers about itself is its ceasing to make any causal inferences. Feedback here yields the attitude of total scepticism, in the sense of rendering it reasonable that one ought totally to suspend judgment. To be sure, Hume does hold that no one is in fact such a total sceptic: Nature, by an absolute and uncontroulable necessity has determin 'd us to judge as well as to breathe and feel; nor can we any more forbear viewing certain objects in a stronger and fuller light, upon account of their customary connexion with a present impression, than we can hinder ourselves from thinking as long as we are awake, or see the 92. surrounding bodies, when we turn cur eyes towards them in broad sunshine. (T183) Inferences from sample to population cannot but be fallible, and this is the best we can do, given the logical gap between sample and population.The argument for scepticism with regard to reason concludes not only that such inferences are fallible, that they may be wrong, but more strongly that we have the strongest of reasons for supposing that they... (shrink)

Alvin Plantinga’s religious epistemology has been used to respond to many debunking arguments against theistic belief. However, critics have claimed that Plantinga’s religious epistemology conflicts with skeptical theism, a view often used in response to the problem of evil. If they are correct, then a common way of responding to debunking arguments conflicts with a common way of responding to the problem of evil. In this paper, I examine the critics’ claims and argue that they are right. I (...) then present two revised versions of Plantinga’s argument for his religious epistemology. I call the first a 'religion-based argument' and the second an 'intention-based argument'. Both are compatible with skeptical theism, and both can be used to respond to debunking arguments. They apply only to theistic beliefs of actual persons who have what I call 'doxastically valuable relationships' with God – valuable relationships the goods of which entail the belief that God exists. (shrink)

Anthony Brueckner has argued that claims about underdetermination of evidence are suppressed in closure-based scepticism (“The Structure of the Skeptical Argument”, Philosophy and Phenomenological Research 54:4, 1994). He also argues that these claims about underdetermination themselves lead to a paradoxical sceptical argument—the underdetermination argument—which is more fundamental than the closure argument. If Brueckner is right, the status quo focus of some predominant anti-sceptical strategies may be misguided. In this paper I focus specifically on the relationship between these two (...) arguments. I provide support for Brueckner’s claim that the underdetermination argument is the more fundamental sceptical argument. I do so by responding to a challenge to this claim put forward by Stewart Cohen (“Two Kinds of Skeptical Argument”, Philosophy and Phenomenological Research 58:1, 1998). Cohen invokes an alternative epistemic principle which he thinks can be used to challenge Brueckner. Cohen’s principle raises interesting questions about the relationship between evidential considerations and explanatory considerations in the context of scepticism about our knowledge of the external world. I explore these questions in my defence of Brueckner. (shrink)

Most a posteriori arguments against the existence of God take the following form: (1) If God exists, the world would not be like this (where 'this' picks out some feature of the world like the existence of evil, etc.) (2) But the world is like this . (3) Therefore, God does not exist. Skeptical theists are theists who are skeptical of our ability to make judgments of the sort expressed by premise (1). According to skeptical theism, if there were (...) a God, it is likely that he would have reasons for acting that are beyond our ken, and thus we are not justified in making all-things-considered judgments about what the world would be like if there were a God. In particular, the fact that we don't see a good reason for X does not justify the conclusion that there is no good reason for X. 1 Thus, skeptical theism purports to undercut most a posteriori arguments against the existence of God. What follows is an account of the nature of skeptical theism, an application of skeptical theism to both the argument from evil and the argument from divine hiddenness, and a review of the cases for and against skeptical theism. (shrink)

It is nowadays taken for granted that the core radical sceptical arguments all pivot upon the principle that the epistemic operator in question is 'closed' under known entailments. Accordingly, the standard anti-sceptical project now involves either denying closure or retaining closure by amending how one understands other elements of the sceptical argument. However, there are epistemic principles available to the sceptic which are logically weaker than closure but achieve the same result. Accordingly the contemporary debate fails (...) to engage with the sceptical problem in its strongest form. (shrink)

Radical skepticism, the view that no human being has any contingent knowledge of any external world there may be, has few adherents these days. But many who reject it concede that such skeptical arguments as SA require some sort of response, since they are obviously valid and their premises are, at the very least, highly plausible.

Critics of skeptical theism often claim that if it (skeptical theism) is true, then we are in the dark about whether (or for all we know) there is a morally justifying for God to radically deceive us. From here, it is argued that radical skepticism follows: if we are truly in the dark about whether there is a morally justifying reason for God to radically deceive us, then we cannot know anything. In this article, I show that skeptical theism does (...) not entail that we are in the dark about whether (or for all we know) there is a morally justifying reason for God to deceive us. And hence arguments against skeptical theism that make use of this assumption fail. (shrink)

Skeptical theism is the view that human knowledge and understanding are severely limited, compared to that of the divine. The view is deployed as an undercutting defeater for evidential arguments from evil. However, skeptical theism has broader skeptical consequences than those for the argument from evil. The epistemic principles of this skeptical creep are identified and shown to be on the road to global skepticism.

In middle to late Byzantium, one finds dogmatic-style sceptical arguments employed against human reason in relation to divine revelation, where revelation becomes the sole criterion of certain truth in contrast to reason. This argumentative strategy originates in early Christian authors, especially Clement of Alexandria (c. 150–215 CE) and Gregory Nazianzen (c. 329–390 CE), who maintain that revelation is the only domain of knowledge where certainty is possible. Given this, one finds two striking variations of this sceptical approach: (...) a “mild” variant (represented by Clement), where knowledge derived from human reason admits partial access to truths manifested in revelation, if imperfect; and a “strict” variant (represented by Gregory), where knowledge derived from human reason does not admit any access to truths in revelation. This paper analyzes the three Byzantines, Nicholas of Methone (d. 1160/66 CE), Theodore Metochites (1270–1320 CE), and Gregory Palamas (1296–1357/59 CE), who each display certain tendencies toward these two “poles” in their respective epistemological positions on knowledge through reason and faith. (shrink)

Skeptical theism is a popular response to arguments from evil. Many hold that it undermines a key inference often used by such arguments. However, the case for skeptical theism is often kept at an intuitive level: no one has offered an explicit argument for the truth of skeptical theism. In this article, I aim to remedy this situation: I construct an explicit, rigorous argument for the truth of skeptical theism.

This chapter contains sections titled: How Much of a Bad Thing Is Too Much? Unreasonable Expectations A Third Kind of Skeptical Defense Interim Verdict on Draper and Rowe Suggested Reading.

Arguments from evil purport to show that some fact about evil makes it (at least) probable that God does not exist. Skeptical theism is held to undermine many versions of the argument from evil: it is thought to undermine a crucial inference that such arguments often rely on. Skeptical objections to skeptical theism claim that it (skeptical theism) entails an excessive amount of skepticism, and therefore should be rejected. In this article, I show that skeptical objections to skeptical (...) theism have a very limited scope: only those who reject certain (apparently) popular epistemological theories will be threatened by them. (shrink)

I define an ‘evidential argument from evil’ as an attempt to show that something we know about evil, while not provably incompatible with theism, is evidence against theism in the precise sense that it lowers the epistemic probability of theism being true. Such arguments must show that, for some statement e about evil that we know to be true, the antecedent probability of e given the denial theism – Pr(e/~G) – is greater than the antecedent probability of e given (...) theism – Pr(e/G). To show that e is strong evidence against theism, such arguments must show that Pr(e/~G) is many times greater than Pr(e/G). Skeptical theists seek to refute such arguments by denying that Pr(e/G) can be assessed with sufficient specificity to draw any interesting conclusions about how it compares to Pr(e/~G). Skeptical atheists seek refute such arguments by denying that Pr(e/~G) can be assessed with sufficient specificity to draw any interesting conclusions about how it compares to Pr(e/G). I argue that skeptical atheism is the more serious challenge of the two. I close by briefly discussing the implications of these results for the project of constructing a successful argument from evil against theism. (shrink)

This study deals with the sceptical arguments by one of the most important figures in the philosophical Sufi tradition (the Akbarian school) and the foremost disciple of Ibn ʿArabī, Ṣadr al‐Dīn al‐Qūnawī. Though not a sceptic in the strict sense, Qūnawī employs sceptical arguments from relativity of rational knowledge and disagreement among philosophers to prove inefficacy of reason and rational procedures of knowledge in terms of achieving certain knowledge of metaphysical matters, namely of God and the (...) ultimate principles of things. The paper questions Qūnawī's implicit assumption that, if there is disagreement on a proposition p, then p is relative and thus cannot provide certain knowledge. It aims to philosophically analyse and assess his scepticism as well as to shed light on the largely unknown terrain of scepticism in the mediaeval Islamic world. (shrink)

Humean arguments from evil maintain that the good and evil we know about constitutes powerful evidence against Theism. Unlike other arguments from evil, Humean arguments are abductive arguments, maintaining that some rival to Theism better explains the good and evil we know about than Theism. This article surveys Humean arguments from evil. After explaining Philo’s original argument in Hume’s Dialogues Concerning Natural Religion, it exposits a modern, prototypical Humean argument inspired by the work of Paul (...) Draper. This article explores the distinctive features of Humean arguments; how these arguments can be strengthened; and some common criticisms of these arguments. (shrink)

According to a simple Bayesian argument from evil, the evil we observe is less likely given theism than given atheism, and therefore lowers the probability of theism. I consider the most common skeptical theist response to this argument, according to which our cognitive limitations make the probability of evil given theism inscrutable. I argue that if skeptical theists are right about this, then the probability of theism given evil is itself largely inscrutable, and that if this is so, we ought (...) to be agnostic about whether God exists. (shrink)

Arguments strong enough to justify skeptical theism will be strong enough to justify the position that every claim about God is empirically unfalsifiable. This fact is problematic because that position licenses further arguments which are clearly unreasonable, but which the skeptical theist cannot consistently accept as such. Avoiding this result while still achieving the theoretical objectives looked for in skeptical theism appears to demand an impossibly nuanced position.

_ Source: _Volume 7, Issue 2, pp 114 - 135 It is a commonly accepted assumption in contemporary epistemology that we need to find a solution to ‘closure-based’ sceptical arguments and, hence, to the ‘scepticism or closure’ dilemma. In the present paper I argue that this is mistaken, since the closure principle does not, in fact, do real sceptical work. Rather, the decisive, scepticism-friendly moves are made before the closure principle is even brought into play. If we (...) cannot avoid the sceptical conclusion, this is not due to closure’s holding it in place, but because we’ve already been persuaded to accept a certain conception of perceptual reasons, which both issues a standing invitation to radical scepticism and is endemic in the contemporary literature. Once the real villain of the piece is exposed, it will become clear that the closure principle has been cast in the role of scapegoat in this debate. (shrink)

Skeptical theists purport to undermine evidential arguments from evil by appealing to the fact that our knowledge of goods, evils, and their interconnections is significantly limited. Michael J. Almeida and Graham Oppy have recently argued that skeptical theism is unacceptable because it results in a form of moral skepticism which rejects inferences that play an important role in our ordinary moral reasoning. In this reply to Almeida and Oppy's argument we offer some reasons for thinking that skeptical theism need (...) not lead to any such objectionable form of moral skepticism. (shrink)

In this paper, I offer reasons for thinking that two prominent sceptical arguments in the literature – the underdetermination-based sceptical argument and the closure-based sceptical argument – are less philosophically interesting than is commonly supposed. The underdetermination-based argument begs the question against a non-sceptic and can be dismissed with little fanfare. The closure-based argument, though perhaps not question-begging per se, does rest upon contentious assumptions that a non-sceptic is under no pressure to accept.