Academic Skeptics

with Thomas F. Gordon and Henry Prakken. Artificial Intelligence, forthcoming. [Preprint posted.].

The Academic scholarch Carneades of Cyrene withdrew from active lecturing several years before his death. He handed the Academy over – either formally or informally – to a successor, who remained in charge for six years and passed away in Carneades’ own lifetime. Philodemus reports this episode three times in the Index Academicorum. Since 1869 scholars have never questioned the notion that Carneades’ lifetime-successor was a namesake: Carneades, son of Polemarchus. Now, new readings of several lines in all three passages (...) reveal that the name of Carneades’ successor was actually Polemarchus of Nicomedia – a man skilled in dialectical methods. There never was a second Academic named Carneades. (shrink)

I offer a novel reading in this dissertation of René Descartes’s (1596–1650) skepticism in his work Meditations on First Philosophy (1641–1642). I specifically aim to answer the following problem: How is Descartes’s skepticism to be read in accordance with the rest of his philosophy? This problem can be divided into two more general questions in Descartes scholarship: How is skepticism utilized in the Meditations, and what are its intentions and relation to the preceding philosophical tradition? -/- I approach the topic (...) from both a historical and a text-based analysis, combining textual and contextual research. I examine Descartes’s skepticism against two main traditions in the historical analysis: philosophical skepticism and Aristotelian Scholasticism. I argue that skepticism in the Meditations is intended to oppose and upheave both Scholasticism and skepticism. The intended results of the work are not merely epistemological but also metaphysical and even ethical. Furthermore, these ambitions cannot be neatly distinguished but merge into each other. -/- The third historical context against which the skeptical meditations are examined is the literary genre of meditative exercises, particularly from the 1500–1600’s, which, while religiously and spiritually oriented, likewise provided the practitioner with an enlightened understanding of self-knowledge and their cognitive place in the world on the way to closer spiritual proximity to God. I argue by this reading that the skepticism of the Meditations is an attentive, meditational cognitive exercise that is not merely instrumental and methodological but is to have a genuine and serious (psychologically real) effect on our thinking. The skeptical meditation is not simply a theoretical thought experiment but is to be seriously practiced as a transformative process of reorienting one’s cognitive framework to discover truth, certainty, and a way to a happy, tranquil, and virtuous life. -/- I offer a close reading in the textual analysis of the first three meditations of the Meditations. I argue that the meditative skepticism employed in the work does not reject the previous beliefs but suspends judgment on them, withdrawing assent until further evidence can be found. I introduce a new term into Descartes scholarship in this analysis, based on the terminology of ancient skepticism: Cartesian epochē (gr. epochē, suspension, withdrawal). Instead of rejecting previous beliefs or assenting to the probably false, the skeptical procedure of the Meditations is argued to emulate in important ways the suspension of judgment on equally balanced reasons in ancient Pyrrhonian skepticism. Novel interpretations are presented along the way of the will’s freedom, of the First Meditation’s skeptical scenarios, of the cogito, and of the vindication of metaphysical certainty, as well as a clarification of the Cartesian Circle problem. -/- Reinterpreting the relation of Descartes’s skepticism to the preceding historical and literary traditions leads to a new look at the skeptical method itself. Presenting a new interpretation of skepticism in the Meditations leads at the same time to a new look at its relation to the historical context. The two research questions are, then, intrinsically tied together. -/- My focus in the study is on the Meditations, but I also reference and discuss Descartes’s other philosophical works, as well as his correspondence, when necessary. (shrink)

One Stoic response to the skeptical indistinguishability argument is that it fails to account for expertise: the Stoics allow that while two similar objects create indistinguishable appearances in the amateur, this is not true of the expert, whose appearances succeed in discriminating the pair. This paper re-examines the motivations for this Stoic response, and argues that it reveals the Stoic claim that, in generating a kataleptic appearance, the perceiver’s mind is active, insofar as it applies concepts matching the perceptual stimulus. (...) I argue that this claim is reflected in the Stoic definition of the kataleptic appearance, and that it respects their more general account of mental representation. I further suggest that, in attributing some activity to the mind in creating each kataleptic appearance, and in claiming that the expert’s mind allows her to form more kataleptic appearances than the amateur, the Stoics draw inspiration from the wax tablet model in Plato’s Theaetetus, where Socrates distinguishes the wise from the ignorant on the basis of how well they match sensory input with its appropriate mental ‘seal’. (shrink)

The focus of this paper is the dispute between the Academic Arcesilaus of Pitane (ca. 316–240 BC) and the philosophy of Zeno of Citium. Scholars typically claim that Arcesilaus set out to attack Zeno’s epistemology or theory of knowledge. The framework of epistemology prevails in the modern reconstruction of Arcesilaus’s arguments. Proponents of this framework usually contend that the epistemic possibility of Stoic “cognition” or “apprehension” (κατάληψις) is the principal aim of Arcesilaus’s attack. The aim of this article is to (...) contest the limited scope of the framework of epistemology in the interpretation of Arcesilaus’s attack, and reposition his critical arguments, in view of the fragmentary evidence, within the framework of an ontology of knowledge. (shrink)

A fairly long (~15,000 word) overview of ancient theories of freedom and determinism. It covers the supposed threat of causal determinism to "free will," i.e., the sort of control we need to have in order to be rightly held responsible for our actions. But it also discusses fatalistic arguments that proceed from the Principle of Bivalence, what responsibility we have for our own characters, and god and fate. Philosophers discussed include Aristotle, Epicurus, the Stoics, Carneades, Alexander of Aphrodisias, and Plotinus. (...) Plato is mentioned in passing a few times in connection with other philosophers. (shrink)

La présente étude a deux objectifs. Le premier est d’examiner les différentes formulations de l’objection de l’ἀπραξία telle qu’elle fut soulevée contre le scepticisme académicien et le pyrrhonisme, ainsi que les réponses à cette objection proposées par Arcésilas et Sextus Empiricus. Le second objectif consiste à évaluer la force de la version de l’objection de l’ἀπραξία selon laquelle le sceptique ne peut réaliser les actions rationnelles propres à l’être humain.

Le scepticisme est une véritable constante de l’histoire de la philosophie depuis l’Antiquité. En se nourrissant des désaccords philosophiques, il ne cesse de se transformer pour mieux remettre en cause les certitudes du dogmatisme. Ce volume présente des contributions en langue française de spécialistes de la pensée sceptique dans l’antiquité, domaine qui s’est considérablement développé ces dernières années. Les études ici présentées portent aussi bien sur le pyrrhonisme que sur la nouvelle Académie ou l’empirisme médical ; elles utilisent une variété (...) d’approches (analytique, systématique et historiographique), toutes dans le même but : mieux comprendre l’énigme de la pensée sceptique. (shrink)

In his Contra Academicos, Augustine offers one of the most detailed responses to scepticism to have come down to us from antiquity. In this paper, I examine Augustine’s defence of the existence of infallible knowledge in Contra Academicos 3. I challenge a number of established views (including those of Myles Burnyeat, Gareth Matthews, and Christopher Kirwan) concerning the nature and merit of Augustine’s defence of knowledge and propose a new understanding of Augustine’s response to scepticism (including his semantic response to (...) external world scepticism) and several important elements of Augustine’s thought concerning signification, cognition, and object-directed thought. I argue that once we properly understand Augustine’s views about these issues, his arguments in defence of knowledge are more interesting and more successful than usually thought. (shrink)

Less than a century after Plato’s death, the Academy’s scholarch Arcesilaus of Pitane inaugurates a peculiar oral phase of Academic philosophy, deciding not to write philosophical works or openly teach his own doctrines. Scholars often attribute a radical change of direction to the school under his headship, taking early Stoic epistemology to be the primary target of the New Academy’s attack on Stoic philosophy. This paper defends a rival view of Arcesilaus’ Academic revolution. Shifting the focus of that attack from (...) epistemology to ethics, the paper illuminates the continuity in development from Polemo to Arcesilaus and the evidence corroborating this continuity. (shrink)

Skepticism: From Antiquity to the Present is an authoritative and up-to-date survey of the entire history of skepticism. Divided chronologically into ancient, medieval, renaissance, modern, and contemporary periods, and featuring 50 specially-commissioned chapters from leading philosophers, this comprehensive volume is the first of its kind.

En este artículo reconstruyo y analizo las respuestas de los escépticos académicos a la objeción de apraxia. Esta objeción afirma que el escepticismo es una doctrina imposible de practicar puesto que sus tesis conducen a la apraxia, esta es, un estado de privación o imposibilidad de acción. Las respuestas a la objeción se dividen en dos clases. La primera prueba que el asentimiento no es una condición necesaria para realizar acciones, por lo que la recomendación escéptica de suspender global y (...) permanentemente el asentimiento no conduciría a la apraxia. La segunda prueba que es posible deliberar y orientar racionalmente nuestras acciones sin impresiones aprehensivas, por lo que la tesis escéptica de que no existen impresiones aprehensivas tampoco conduciría a la apraxia. Tras unas breves consideraciones generales, en la primera parte de este artículo presento las respuestas de Arcesilao y en la segunda parte las repuestas de Carnéades. (shrink)

This paper offers a new defense of the externalist interpretation of the kataleptic impression. My strategy is to situate the kataleptic impression within the larger context of the Stoic account of expertise. I argue that, given mastery in recognizing the limitations of her own state of mind, the subject can restrict her assent to kataleptic impressions, even if they are phenomenologically indistinguishable from those which are not kataleptic.

The fundamental issue regarding Arcesilaus’ skepticism is whether it should be understood as a philosophical position or as a strictly dialectical practice with no doctrinal content. In this paper I argue that it is both by providing an account of the epistemic principles informing his practice along with a positive doxastic attitude that he may consistently take towards those principles. I further show how Arcesilaus may have reasonably derived his Socratic project, including the epistemic principles and his distinctive cognitive attitude, (...) from his reading of Plato’s dialogues, and that this approach enables us to better understand the function of his practical criterion, the reasonable (to eulogon). And finally, I note that since Arcesilaus’ great successor Carneades confronts the same problem regarding the coherence of his Socratic project, a similar interpretative approach may be taken to his practical criterion, the persuasive (to pithanon). (shrink)

Scholars of Greek and Roman antiquity advance a variety of reasons to explain why the study of Hellenistic philosophy remains dependent on fragments and testimonies. Mansfeld observes such dependence in his use of the premise that philosophers of late antiquity based philosophical instruction and school curricula on a core set of writings from the classical period. On this basis, Mansfeld infers that schools of late antiquity continually transcribed and preserved writings of instructional significance. The schools routinely excluded other classical and (...) Hellenistic writings from the curricula, thus ensuring that a sizable body of literature deemed less pedagogically significant would perish, along with the original material on which the inscriptions had been made. The main problem with this standard survey of reasons is that it fails to explain why we remain extraordinarily dependent on peripheral sources and later testimonies in studying the Hellenistic Academy. (shrink)

In Paradoxa Stoicorum, the Roman philosopher Cicero defends six important Stoic theses. Since these theses seem counterintuitive, and it is not likely that the average person would agree with them, they were generally called "paradoxes". According to the third paradox, (P3), (all) transgressions (wrong actions) are equal and (all) right actions are equal. According to one interpretation of this principle, which I will call (P3′), it means that if it is forbidden that A and it is forbidden that B, then (...) not-A is as good as not-B; and if it is permitted that A and it is permitted that B, then A is as good as B. In this paper, I show how it is possible to prove this thesis in dyadic deontic logic. I also try to defend (P3′) against some philosophical counterarguments. Furthermore, I address the claim that (P3′) is not a correct interpretation of Cicero’s third paradox and the assertion that it does not matter whether (P3′) is true or not. I argue that it does matter whether (P3′) is true or not, but acknowledge that (P3′) is perhaps a slightly different principle than Cicero’s thesis. The upshot is that (P3′) seems to be a plausible principle, and that at least one part of paradox III in Cicero’s Paradoxa Stoicorum appears to be defensible. (shrink)

Cicero is increasingly recognised as a highly intelligent contributor to the ongoing ethical debates between Epicureans, Stoics and other schools. In this work on the fundamentals of ethics his learning as a scholar, his skill as a lawyer and his own passion for the truth result in a work which dazzles us in its presentation of the debates and at the same time exhibits the detachment of the ancient sceptic. Many kinds of reader will find themselves engaged with Cicero as (...) well as with the ethical theories he presents. This collection takes the reader further into the debates, opening up new avenues for exploring this fascinating work. (shrink)

This book will be of considerable interest to those familiar with Hellenistic philosophy generally and with Cicero’s philosophical dialogues in particular. Maso’s close readings of the primary texts produce many valuable insights into Cicero’s philosophical worldview and his complex and nuanced attitude toward Epicurean physics, theology, epistemology, and ethics. One of the central themes of the work is the tempering of Cicero’s devotion to the primacy of the political life. Maso aims to show how this is reflected over time in (...) his attitude toward Epicureanism, while he struggles against the political realities that excluded him from playing the civic role he craved and that eventually cost him his life. Indeed, we... (shrink)

The present study centres on the distinctive characteristics of Cicero's philosophical training. Not only does Cicero exhibit his lofty philosophical proficiency anchored in the Academic school, but he also proves an excellent authority on Epicurus's proposed philosophy.

Academic skepticism is usually interpreted as a type of discourse without an assertion (a dialectical interpretation). I argue against this interpretation. One can interpret Carneades’ notion of approval as our notion of weak assertion and thereby ascribe to him his own views (a non-dialectical interpretation). In Academica Cicero reports the debate about the status of approval as a kind of assent among Carneades’ followers, especially the views of Clitomachus and Philo of Larissa. According to Clitomachus, approving impressions implies acting on (...) them without taking them as true, while according to Philo of Larissa, approval is taking something as true without certainty. In more modern terms, we can say that Philo refers to the notion of weak assertion, and Clitomachus to non-assertion. Thus Clitomachus’ reading correlates with a dialectical reading, and Philo’s reading correlates with a non-dialectical reading. Philo’s reading leads to the interpretation of Carneades as a quasi-fallibilist. It is difficult to establish the precise position of the historical Carneades because he was hesitant in his oral teaching. Still, there is some basis in Carneades’ theory for interpreting approval as weak assertion (comprising three degrees of persuasiveness involving rational consideration of what seems to be truth). My aim in this essay is thus to argue that a quasi-fallibilist and non-dialectical reading is applicable to the historical Carneades. (shrink)

Roman Political Thought is the first comprehensive treatment of the political thought of the Romans. Dean Hammer argues that the Romans were engaged in a wide-ranging and penetrating reflection on politics. The Romans did not create utopias. Instead, their thinking was relentlessly shaped by their own experiences of violence, the enormity and frailty of power, and an overwhelming sense of loss of the traditions that oriented them to their responsibilities as social, political, and moral beings. However much the Romans are (...) known for their often complex legal and institutional arrangements, the power of their political thought lies in their exploration of the extra-institutional, affective foundations of political life. The book includes chapters on Cicero, Lucretius, Sallust, Virgil, Livy, Seneca, Tacitus, Marcus Aurelius, and Augustine and discussions of Polybius, the Stoics, Epicurus, and Epictetus. (shrink)

The paper proposes a new interpretation of Timon's attack on Arcesilaus in fr. 806 SH.

This paper examines the Stoic account of apprehension (κατάληψις) (a cognitive achievement similar to how we typically view knowledge). Following a seminal article by Michael Frede (1983), it is widely thought that the Stoics maintained a purely externalist causal account of apprehension wherein one may apprehend only if one stands in an appropriate causal relation to the object apprehended. An important but unanswered challenge to this view has been offered by David Sedley (2002) who offers reasons to suppose that the (...) Stoics (or at least Zeno, the founder of the Stoa) did not make such a causal stipulation. I offer a defence of the traditional, causal reading against the challenges raised by Sedley but also argue, against the traditional view, that the Stoic account incorporated an internalist element. On the hybrid account defended here, in order to apprehend not only must the agent stand in an appropriate causal relation to the object apprehended but the agent’s appearance of the object must also be clear (a feature which is accessible to the epistemic agent). The traditional scholarly view rejects internalist interpretations because it is thought that such interpretations cannot make sense of the Stoics’ discussion of the ‘automatic assent’ produced by kataleptic appearances and a purely externalist view is taken to be charitable insofar as it saves the Stoics from a vicious regress which they would otherwise face (were they internalists). I spell out how the regress might be taken to function and defend an internalist interpretation against both these charges. The internalist element embraced by the Stoics does not lead to the problems it is often thought to and the account defended here not only does justice to the textual evidence but also sheds light on the Stoic debates with their sceptical opponents and grants the Stoics an epistemic account fit for purpose. (shrink)

This paper analyzes the apraxia argument in Cicero’s Academica. It proposes that the argument assumes two modes: the evidential mode maintains that skepticism is false, while the pragmatic claims that it is disadvantageous. The paper then develops a tension between the two modes, and concludes by exploring some differences between ancient and contemporary skepticism.

Ancient philosophy knew two main skeptical traditions: the Pyrrhonian and the Academic. In this final paper of the three‐part series devoted to ancient skepticism, I present some of the topics about Academic skepticism which have recently been much debated in the specialist literature. I will be concerned with the outlooks of Arcesilaus, Carneades, and Philo of Larissa.

British Journal for the History of Philosophy, Volume 19, Issue 3, Page 573-579, May 2011.

Scholarship on ancient skepticism has undergone a remarkable renaissance in the last three decades. Specialists in ancient philosophy have explored the complex history of the Greco‐Roman skeptical traditions and discussed difficult philological and exegetical issues. But they have also assessed the philosophical significance of the various ancient skeptical outlooks. In this first paper, I provide a general presentation of this area of study, while in the two subsequent articles I will focus on some of the topics that have been the (...) object of much attention in the recent literature on ancient skepticism. (shrink)

Apresentação da tradução do livro Os Céticos Gregos, de Victor Brochard. São Paulo: Odysseus Editora, 2010, 464 pp. [ISBN: 8578760034].