The five modes are a list of tools used by ancient sceptics to guide dogmatic people towards suspending their judgement. Attributed to Agrippa and used extensively by Sextus Empiricus, these modes are still widely discussed today by epistemologists and specialists in ancient philosophy. Scholars disagree, however, on how to understand the way the five modes are used together and what the logical form of the sceptical strategy behind their deployment is. This paper offers a reconstruction of the system of the (...) five modes that avoids these problems. In specific, unlike previous reconstructions, it includes a non-trivial version of the mode of relativity, avoids committing the sceptic to a normative principle and follows the textual evidence more closely. Moreover, I argue that the system can be better understood as a list of steps in a process, whose underlying logic can be expressed by a single algorithm. (shrink)

This paper presents Hegel’s criticism of two central ideas of Pyrrhonism: the importance of stating only how things appear and Pyrrhonism as a way of life. After providing a sketch of the main features of Pyrrhonism, the paper lays out and critically evaluates Hegel’s largely unexamined argument against Pyrrhonism in his early 1802 essay on skepticism. Hegel claims that the Pyrrhonist’s appeal to appearance renders Pyrrhonism philosophically vacuous: insofar as Pyrrhonism merely describes the subjective contents of the Pyrrhonist’s mind, it (...) has no philosophical import. Sextus would not accept Hegel’s criticism because the appeal to appearance could express the provisional rather than purely subjective character of Pyrrhonism. The paper proceeds by examining Hegel’s argument in the Phenomenology that skepticism is contradictory on account of conjoining suspension of judgment with acquiescing in appearances as the guide to life. Sextus would reject Hegel’s criticism by insisting on the distinction between judgment and appearance. (shrink)

Much of present-day epistemology is divided between internalists and externalists. Different as these views are, they have in common that they strip justification from its dialectical component in order to block the skeptic’s argument from disagreement. That is, they allow that one may have justified beliefs even if one is not able to defend it against challenges and resolve the disagreements about them. Lammenranta (2008, 2011a) recently argued that neither internalism nor externalism convinces if we consider the argument in its (...) most interesting format. In this paper I zoom in on this debate, and fix further details of Lammenranta’s lead. Specifically, I will side with skepticism that justification is dialectical, yet only if certain conditions are in place. (shrink)

This paper applies speech-act theory to craft a new response to Pyrrhonian skepticism and diagnose its appeal. Carefully distinguishing between different levels of language-use and noting their interrelations can help us identify a subtle mistake in a key Pyrrhonian argument.

I defend the view that Cicero writes the Academica from the perspective of an aspirationalist radical skeptic. In section 2 I examine the textual evidence regarding the nature of Cicero’s skeptical stance in the Academica. In section 3 I consider the textual evidence from the Academica for attributing aspirationalism to Cicero. Finally, in section 4 I argue that while aspirationalist radical skepticism is open to a number of philosophical objections, none of those objections is decisive.

The skeptical Dream argument appeals to the possibility of dreaming. The skeptic holds that states of being awake are subjectively indistinguishable from possible dream states and that this means that we do not know that we are awake. This, the skeptic then claims, means that we have to accept that we do not have external world knowledge.It is natural to assume that there must be a connection between the Dream argument and epistemic internalism, the view that a belief is justified (...) for a given person if and only if the person has cognitive access to all the factors that are needed for the belief to be justified. The problem, the skeptic thinks, is that in order for my belief that I am awake to be justified I have to have cognitive access to something that establishes that I am awake. But according to the skeptic, even if I am awake, this is not something I have cognitive access to. However, the more precise connections between internalism and the skeptical argument are not so clear. (shrink)

The skeptical Dream argument appeals to the possibility of dreaming. The skeptic holds that states of being awake are subjectively indistinguishable from possible dream states and that this means that we do not know that we are awake. This, the skeptic then claims, means that we have to accept that we do not have external world knowledge.It is natural to assume that there must be a connection between the Dream argument and epistemic internalism, the view that a belief is justified (...) for a given person if and only if the person has cognitive access to all the factors that are needed for the belief to be justified. The problem, the skeptic thinks, is that in order for my belief that I am awake to be justified I have to have cognitive access to something that establishes that I am awake. But according to the skeptic, even if I am awake, this is not something I have cognitive access to. However, the more precise connections between internalism and the skeptical argument are not so clear. (shrink)

The aim of Pyrrhonism is deceptively simple: to achieve a state of ataraxia, of tranquility and relief from perturbation. But what is the extent of the ataraxia envisioned? Must the Skeptic admit a hard distinction between disturbances apparently related to belief and there­fore subject to suspension of judgement, and extra-doxastic disturbanc­es that are beyond the scope of the Skeptical method? In this paper I examine passages from Sextus’s Outlines of Pyrrhonism that indicate that such a distinction may not stand up (...) to Skeptical scrutiny and that the Skepti­cal method does not only apply to “philosophical” speculative dogma or to “intellectual” perturbation, contra Barnes’s claim that the person who perceives the fewest anomalies may make “the perfect Pyrrhonist”. But I also, following Massie’s critique of unwarranted causal inferences regarding the relation between equipollence and ataraxia, distinguish cases where tarache presents itself as anomalous and thus lends itself to inquiry from cases where it presents itself with an appar­ent cause and does not provoke inquiry. Thus, though an apparently extra-doxastic disturbance may actually be rooted in unconsciously-held dogma, the Skeptic cannot demarcate a special class of potentially doxastic disturbances without employing a dogmatic psychology of her own. She must instead suspend judgment regarding the entire scope of her method, entertaining the possibility that any disturbance could be relieved through the Skeptical method. In the process, ataraxia is divested of definite parameters and the Skeptical method becomes effectively endless. (shrink)

In his Pyrrhonian Outlines , Sextus Empiricus employs an argument based upon the possibility of disagreement in order to show that one should not assent to a Dogmatic claim to which at present one cannot oppose a rival claim. The use of this argument seems to be at variance with the Pyrrhonian stance, both because it does not seem to accord with the definition of Skepticism and because the argument appears to entail that the search for truth is doomed to (...) failure. In the present paper, I examine the passages in which Sextus utilizes the argument from possible disagreement and offer an interpretation that makes the use of this argument compatible with the Pyrrhonian outlook. (shrink)

This paper argues for the following three claims. First, the Agrippan mode from disagreement does not play a secondary role in inducing suspension of judgment. Second, the Pyrrhonist is not committed to the criteria of justification underlying the Five Modes of Agrippa, which nonetheless does not prevent him from non-doxastically assenting to them. And third, some recent objections to Agrippan Pyrrhonism raised by analytic epistemologists and experimental philosophers fail to appreciate the Pyrrhonist's ad hominem style of argumentation and the real (...) challenge posed by the mode from disagreement. (shrink)

Review of Smith, P. (2022). Sextus Empiricus’ Neo-Pyrrhonism: Skepticism as a Rationally Ordered Experience. Cham: Springer.

I argue in this paper that, like the Pyrrhonism of Sextus Empiricus, Wittgenstein’s response to negative–dogmatic skepticism in On Certainty turns on the attempt to free us from the demands of traditional philosophy and is therefore not a philosophical position, strictly speaking. Rather, it is a therapeutic metaphilosophy designed to bring into view (i.e., to illumine) the relationship between our everyday epistemic practices and those of philosophy such that we simultaneously come to recognize (a) what I call the pragmatic–transcendental self–standingness (...) of the everyday and (b) its philosophical–rational groundlessness. The Pyrrhonian illumination of the everyday is therapeutic in that it aims to purify our metadoxastic attitudes of dogmatism. (shrink)

This paper aims to reconstruct the overarching logical structure of Michael Williams's response to philosophical skepticism. One goal is to forestall overhasty dismissals of his position based on failures to understand the logical relations among his various anti‐skeptical claims and arguments. In many places, Williams suggests that the strategy he calls “theoretical diagnosis” is sufficient to defuse the skeptical challenge and that, accordingly, his anti‐skeptical strategy consists solely in developing theoretical diagnoses. According to the account developed here, this claim is (...) misleading—in need of significant qualification, if not outright false. Even so, the paper concludes that, in its essentials, Williams's response is structurally sound, given his understanding of the problem posed by skepticism. The paper ends with a brief assessment of the merits of that response. (shrink)

The question of whether the Pyrrhonist adheres to certain logical principles, criteria of justification, and inference rules is of central importance for the study of Pyrrhonism. Its significance lies in that, whereas the Pyrrhonist describes his philosophical stance and argues against the Dogmatists by means of what may be considered a rational discourse, adherence to any such principles, criteria, and rules does not seem compatible with the radical character of his skepticism. Hence, if the Pyrrhonist does endorse them, one must (...) conclude that he is inconsistent in his outlook. Despite its import, the question under consideration has not received, in the vast literature on Pyrrhonism of the past three decades, all the attention it deserves. In the present paper, I do not propose to provide a full examination of the Pyrrhonist’s attitude towards rationality, but to focus on the question of whether he endorses the law of non-contradiction (LNC). However, I will also briefly tackle the question of the Pyrrhonist’s outlook on both the canons of rational justification at work in the so-called Five Modes of Agrippa and the logical rules of inference. In addition, given that the LNC is deemed a fundamental principle of rationality, determining the Pyrrhonist’s attitude towards it will allow us to understand his general attitude towards rationality. (shrink)

Recent work on the philosophy of G.W.F. Hegel has emphasized his interest in skeptical concerns. These contemporary scholars argue that, despite common opinions to the contrary, Hegel actually had a very keen interest in skepticism, one that informed and motivated much of his overall project. While I welcome this recent literature, I argue here that contemporary scholars have overemphasized the importance of skepticism for Hegel. By looking closely at Hegel’s arguments against skepticism in the Phenomenology of Spirit, I argue that (...) Hegel’s anti-skeptical arguments are in fact major failures. Hegel’s failure is at odds with the emphasis that contemporary literature places on Hegel’s interests in skepticism. For a philosopher who was supposedly centrally concerned with skeptical issues, Hegel sure does not act like it. I conclude that the tension here is the result of contemporary scholars’ overemphasis of the role that skepticism plays in Hegel’s project. (shrink)

While the contemporary problem of the criterion raises similar epistemological issues as Agrippa’s Trilemma in ancient Pyrrhonian skepticism, the consideration of such epistemological questions has served two different purposes. On one hand, there is the purely practical purpose of Pyrrhonism, in which such questions are a means to reach suspension of judgment, and on the other hand, there is the theoretical purpose of contemporary epistemologists, in which these issues raise theoretical problems that drive the search for theoretical resolution. In classical (...) India, similar issues arise in Nāgārjuna’s Vigrahavyāvartanī, but it is not entirely clear what Nāgārjuna’s purpose is. Contrary to the theoretical interpretations of several recent scholars such as Jan Westerhoff according to which Nāgārjuna is proffering a contextualist epistemological theory, I argue that Nāgārjuna as well as the later Madhyamaka Candrakīrti, much like Pyrrhonian skeptics, employed concerns about epistemic criteria in service of purely practical purposes. There is no positive epistemological theory to be found in Nāgārjuna’s Vigrahavyāvartanī and Candrakīrti’s Prasannapadā; furthermore a putative thesis of universal emptiness is self-undermining, a conclusion which itself can be seen as part of a therapeutic program. Nonetheless, the historical persistence of these epistemological issues shows that they ought to continue to be areas of theoretical inquiry for epistemologists today. I end with reflections on the wider relevance of my conclusions, particularly with regard to demonstrating the value of philosophy. (shrink)

Though ancient Pyrrhonian skepticism is apparently based on disagreement, this aspect of skepticism has been widely neglected in contemporary discussion on skepticism. The paper provides a rational reconstruction of the skeptical argument from disagreement that can be found in the books of Sextus Empiricus. It is argued that this argument forms a genuine skeptical paradox that has no fully satisfactory resolution. All attempts to resolve it make knowledge or justified belief either intuitively too easy or impossible.