Stoics: Epistemology

Most traditional tests of knowledge, such as justified true belief, include an element of belief. The need for this element has never been formally justified. Moreover, including belief produces incorrect results and adds nothing to determination of knowledge. A proper test of knowledge, I argue, excludes belief entirely and assesses knowledge instead solely through logical tools that offer the most reliable evaluation of a proposition's correspondence with truth as best we can understand it. My approach avoids errors inherent in the (...) belief-based tests and clarifies our understanding of knowledge. (shrink)

Modern accounts of justification in the theory of justified true belief (JTB) typically rely on a single criterion, supplemented by auxiliary conditions, and do not fully meet the challenge to JTB posed by Gettier cases. Although they did not treat belief as an element of knowledge, the ancient Stoics developed a rigorous, multi-step method for distinguishing knowledge from mere opinion. Bringing these Stoic criteria into JTB yields a more reliable standard, resolves most Gettier-type cases and points the way to further (...) refinements of the standard. (shrink)

Ancient sources often use “suspending judgment” (epechein, epochē) to characterize the Stoic practice of “withholding assent” (asunkatathetein, asunkatathesis), and scholars follow along. But this essay argues that we have been misled, because the third-century (BCE) Stoics saw epechein as a characteristically Academic practice, distinct from asunkatathetein. The argument is that a critical look at the evidence allows, and to some extent encourages, attributing to the Stoics a distinction between asunkatathetein and epechein, and the point of taking this possibility seriously is (...) that it refigures the debate between Academics and Stoics. (shrink)

L’édition a été conçue et réalisée grâce à la collaboration des trois éditeurs, qui ont défini ensemble la structure générale et qui ont approuvé chaque page après une riche discussion commune depuis 2009, à la fois en présence à Paris ou en visioconférence. Depuis 2023, la discussion commune s’est élargie à Veronica Revello. Plus précisément, pour ce qui concerne l’introduction générale, toute la première partie (« Les idées et les mots des Académiques ») est de Carlos Lévy, alors que la (...) deuxième (« L’espace-temps des Académiques ») est la somme des contributions d’E. Malaspina (« I. Localiser les villas » et « II. La ‘pré-histoire’ de la tradition des Académiques »), à nouveau de C. Lévy (« Introduction » et « III. La réception des Académiques, de l’Antiquité à la Renaissance », sauf le § III.1.2) et de Terence Hunt (« III.1.2. Qui d’autre lisait les Académiques dans l’Antiquité? » et « IV. Introduction philologique »). C. Lévy a traduit le texte des Academici libri et, dans le deuxième tome, les Fragments et le Lucullus, tout comme il a rédigé toutes les notes philosophiques présentes dans les deux tomes. Il a également veillé à la correction du français dans les deux tomes. T. Hunt est responsable du Conspectus siglorum, du texte critique et de l’apparat à la fois de l’Academicus primus et des Testimonia dans ce tome et des Fragments dans le tome II. Il a également rédigé les notes philologiques de l’Academicus primus signalées par la mention « TH » et, à la fin de ce tome, l’Annexe I (« Extraits de la Correspondance de Cicéron concernant la composition du Lucullus et de l’Academicus primus »). Enfin, dans le tome II, il a écrit l’Annexe concernant les éditions imprimées des deux traités. Dans le présent tome, E. Malaspina est l’auteur également des notes signalées par « EM » et des paragraphe I.2 « Une objection préliminaire : Philon le philosophe fils d’un Philon stratège thessalien? » et I.4 « Le philosophe de Larissa dans le Lucullus » de l’Annexe II « Philon ou Philion? ». Dans le tome II, il est l’auteur de l’introduction, du Conspectus siglorum, du texte critique et de l’apparat du Lucullus, de toutes les notes signalées par « EM » et enfin des deux listes de leçons (Orthographica et Recentiores et Editiones) à la suite du texte. Veronica Revello est l’auteur de l’Annexe « Philon ou Philion? » (sauf les § I.2 et I.4) et de la note bibliographique dans ce tome, ainsi que des notes signalées par la mention « VR » dans les deux volumes. Elle a également rédigé la Bibliographie générale et tous les Indices dans le tome II. En l’absence de toute autre précision, les traductions sont celles de la Collection des Universités de France. (shrink)

This article intends to demonstrate that Seneca associates involuntary affections with the self (principale/hēgemonikon) and the body in different ways. He distinguishes strict bodily affections from cognitive affections. The former originate in the body and are merely experienced by the self, whereas the latter result from an assent-independent cognitive activity that usually provokes a bodily reaction and is the starting point for developing emotions. Seneca describes this activity as "capere", a concept that has no precedent in the intellectual history of (...) Stoicism. It is an unconscious evaluation occurring in both animals and humans. Letter 92 also provides valuable insights into the embodied self’s relation to affections and emotions. Seneca presents here a psychological model that is much more Stoic than previously recognized. In this context, the article’s main argument is that a connection exists between his acceptance of a twofold irrational component of the self and his two types of affections. (shrink)

When it comes to the discussions of ancient economic thought, the Stoics rarely come to the forefront. By and large, the lack of focus on this Hellenistic philosophical school is understandable: there is no evidence of the Stoics writing treatises entitled oikonomikos or similar or, in fact, showing any substantial interest in the matters pertaining to wealth management or money acquisition. There is an extant fragment, however, depicting a debate between Diogenes of Babylon and Antipater of Tarsus in which the (...) latter advocates for the moral permissibility of the behaviour that comes very close to exhibiting economic rationality. In this paper, I analyse this passage and, noting its complex transmission history, I argue that it reveals an engagement with various ideas pertaining to the oikonomia genre. Although some of them resemble the contemporary notion of economic rationality, ultimately, the Stoic argument is embedded in ethical debates with the Peripatetics and it concerns moral value rather than the homo economicus style of reasoning about maximizing gains. (shrink)

Abstract: This paper aims to establish the problems of the Stoic concept of cognitive representation (καταληπτική φαντασία). So I intend to reconstruct the scholarly debate on this definition. For it, I state the debate around its two most conflictive terms: the participle ὑπάρχον and the preposition ἀπό. By analyzing the Stoic fragments in which these terms appear, I explore both textual and philosophical arguments in order to find the different senses of both. By doing so, my aim is highlighting the (...) limits of those interpretations. My conclusion is proposing certain issues to constitute a research agenda on the Stoic definition of cognitive representation, in order to, to some extent, possible solutions might be discerned.---- . Resumen: El objetivo de este artículo es mostrar cuáles son y en qué consisten los problemas interpretativos de la definición estoica de representación cognitiva (καταληπτική φαντασία). Para tal fin, propongo una reconstrucción del debate académico sobre esta definición. Dicha reconstrucción articula el debate en torno a sus dos términos más problemáticos: el participio ὑπάρχον y la preposición ἀπό. A partir de un análisis de los fragmentos estoicos en los que aparecen estos términos, exploro las razones tanto filosóficas como textuales a favor y en contra de cada uno de los diferentes sentidos de ἀπό y cada una de las diferentes acepciones de ὑπάρχον. Al hacer esto, me propongo evidenciar las limitaciones de las interpretaciones de la definición de representación cognitiva que se han propuesto. Basándome en este examen, propongo en las conclusiones una serie de cuestiones centrales que deben formar parte de la agenda de investigación sobre la definición estoica de representación cognitiva. De esta manera, pueden observarse los retos que supone defender una interpretación determinada y, en cierta medida, podrían también vislumbrarse posibles soluciones. (shrink)

This paper deals with the Stoic concept of misprinted representation (φαντασία παρατυπωτική), which has received little attention compared to other concepts of Stoic epistemology and philosophy of mind. I aim at showing that a better understanding of this concept is important for grasping some elements of the Stoic account of mental representations that have been ignored or misunderstood in modern Stoic scholarship. First, by clarifying the status of the misprinted representation as a genuine representation, we can understand what it means (...) (and does not mean) to say, from the Stoic point of view, that the intentional object of a representation is the external object that caused it. Second, by understanding this issue, we obtain some resources to deal with the ambiguity of the preposition ἀπό in the definition of cognitive representation. Thus, the concept of misprinted representation proves to be important for appropriately understanding the Stoic concepts of representation and cognitive representation. (shrink)

In the 89th letter to Lucilius Seneca divides philosophy into three parts, namely ethics, physics, and logic. As philosophy in general he also divides its ethical parts into three parts: the first one has to do with value judgments, the second with impulses, and the third with actions. But instead of characterizing each of these parts and giving an overview of their contents he rather describes an ideal action: first, one makes a correct value judgment, then, one initiates a regulated (...) and ordered impulse, and finally, one brings this impulse into harmony with one’s external action by paying attention to the circumstances under which one intends to act. If each of these action moments has the mentioned character, one is consistent with oneself—an important step towards reaching full self-consistency, i.e., virtue. If those moments do not have the mentioned character, as for example in a passion, one cannot be consistent with oneself. As a result, one diverges from the goal of full self-consistency and thus from virtue. The thesis of my book takes up the parallel Seneca is drawing between ethics and its parts on the one hand and an action and its moments on the other hand. I argue that his ethics is based on an action theory that has as its main moments a judgment, an impulse and an external action. Within this theoretical framework, Seneca gives an answer to the question of what one should do in order to reach full self-consistency, i.e., virtue, which for a Stoic like him is a necessary and sufficient condition for happiness. My book, correspondingly, has two major parts: first, I am working out Seneca’s action theory and its philosophical origins, then, I am concerned with his ethics. In the first main chapter, I further argue that his action theory stems for the most part from the early Stoics, but that unlike them he has a concept of will. This concept, as I want to show in the second part, plays an important role in his ethics, too. (shrink)

La méthode platonicienne de division a souvent été jugée sévèrement par les commentateurs modernes. Pourtant, dans l’Antiquité et au début du Moyen Âge, cette méthode a été prise au sérieux par de nombreux philosophes issus de courants divers, tantôt certes pour la critiquer, mais tantôt également pour se la réapproprier en l’adaptant au contexte de leur propre pensée. Ils l’appliquèrent à des domaines aussi variés que la zoologie, l’éthique, l’épistémologie, l’ontologie et la théologie, et ce qui pouvait de prime abord (...) paraître un simple outil dialectique devint un puissant instrument philosophique, allant jusqu’à s’identifier, chez Jean Scot Érigène, au mode de fonctionnement de la pensée divine créatrice. L’histoire de cette réception n’avait encore jamais été écrite. Le présent volume cherche à combler cette lacune en insistant sur ses moments les plus remarquables. (shrink)

In this chapter, I explore Seneca’s characterization of becoming and being good, wise, or virtuous, which for a Stoic always amount to the same thing. There is one passage in which Seneca says it is an ars to become good; in another, he says wisdom is an ars, namely an ars vitae. If one bears in mind that wisdom in Stoic philosophy stands for the best possible moral state of character a human being can develop, Seneca’s remarks cannot but attract (...) our attention: it is an ars to become good and an ars to be good. Since it is natural to regard becoming and being (good) as two different things, it is natural to assume that the ars of the person who is striving after virtue (the proficiens) cannot be identical to the ars of the person who already is virtuous. I want to ask what the difference is. (shrink)

This paper examines some neglected Chrysippean fragments on insecure apprehension (κατάληψις). First, I present Chrysippus’ account of how non-Sages can begin to fortify their insecure apprehension and upgrade it into knowledge (ἐπιστήμη). Next, I reconstruct Chrysippus’ explanation of how sophisms and counter-arguments lead one to abandon one’s insecure apprehension. One such counter-argument originates in the sceptical Academy and targets the Stoic claim that insecure apprehension can be acquired on the basis of custom (συνήθεια). I show how Chrysippus could defend the (...) possibility of custom-based apprehension, while also denying that there is custom-based knowledge. (shrink)

This paper examines some neglected Chrysippean fragments on insecure apprehension (κατάληψις). First, I present Chrysippus’ account of how non-Sages can begin to fortify their insecure apprehension and upgrade it into knowledge (ἐπιστήμη). Next, I reconstruct Chrysippus’ explanation of how sophisms and counter-arguments lead one to abandon one’s insecure apprehension. One such counter-argument originates in the sceptical Academy and targets the Stoic claim that insecure apprehension can be acquired on the basis of custom (συνήθεια). I show how Chrysippus could defend the (...) possibility of custom-based apprehension, while also denying that there is custom-based knowledge. (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 (190e–196d), where Socrates distinguishes the wise from the ignorant on the basis of how well they match sensory input with its appropriate mental ‘seal’ (σφραγίς). (shrink)

Since Mates’ seminal Stoic Logic there has been uncertainty and debate about how to treat the term anapodeiktos when used of Stoic syllogisms. This paper argues that the customary translation of anapodeiktos by ‘indemonstrable’ is accurate, and it explains why this is so. At the heart of the explanation is an argument that, contrary to what is commonly assumed, indemonstrability is rooted in the generic account of the Stoic epistemic notion of demonstration. Some minor insights into Stoic logic ensue.

The focus of this paper is the argument 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)

This chapter investigates the Stoic understanding of impressions, assent, opinion, scientific knowledge, and cognition. By analyzing these concepts, I describe one major difference between the wise Stoic sage and unwise people: the wise person is capable of scientific knowledge and strong assent, while the rest of us are not. I will also interpret the Stoic account of the cognitive impression and describe several ways that the student of Stoicism might make epistemic progress.

An overview of the ancient philosophers and their philosophical system (divided into the fields of logic, physics, and ethics) comprising the living, organic, enduring, and evolving body of interrelated ideas identifiable as the Stoic perspective.

Here I propose an interpretation of the ancient Stoic psychological theory on which (i) the concepts that an adult human possesses affect the content of the perceptual impressions (φαντασίαι αἰσθητικαί) she forms, and (ii) the content of such impressions is exhausted by an ‘assertible’ (ἀξίωμα) of suitable complexity. What leads the Stoics to accept (i) and (ii), I argue, is their theory of assent and belief formation, which requires that the perceptual impression communicate information suitable to serve as the content (...) of belief. In arguing for (i), I reject a rival interpretation on which conceptualization occurs subsequently to the formation of a perceptual impression. In arguing for (ii), I deny that perceptual impressions have two kinds of content: one formulated in an assertible, the other sensory, featuring independently of this assertible. I explore the implications of (i) and (ii) for the Stoic theory of emotions, expertise, and rationality, and argue that they shed new light on the workings of impression, assent, and belief. (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.

This paper seeks to elucidate the distinctive nature of the rational impression on its own terms, asking precisely what it means for the Stoics to define logikē phantasia as an impression whose content is expressible in language. I argue first that impression, generically, is direct and reflexive awareness of the world, the way animals get information about their surroundings. Then, that the rational impression, specifically, is inherently conceptual, inferential, and linguistic, i.e. thick with propositional content, the way humans receive incoming (...) information from the world. When we suspend certain contemporary assumptions about propositional content, the textual evidence can be taken at face value to reveal why, for the Stoics, rational impressions are called thoughts (noēseis) and how the Stoics’ novel semantic entities called lekta (roughly, the meanings of our words) depend on rational impressions for their subsistence. (shrink)

In this paper, I clarify some central aspects of Stoic thought concerning identity, identification, and so-called peculiar qualities (qualities which were seemingly meant to ground an individual’s identity and enable identification). I offer a precise account of Stoic theses concerning the identity and discernibility of individuals and carefully examine the evidence concerning the function and nature of peculiar qualities. I argue that the leading proposal concerning the nature of peculiar qualities, put forward by Eric Lewis, faces a number of objections, (...) and offer two constructive suggestions which turn upon reconsidering the nature and function(s) of peculiar qualities. Finally, I examine a simple but potent Academic argument against the view that identification requires detecting some attribute(s) unique to the relevant individual. Such an argument is, I argue, largely successful and may have encouraged later Stoics not to think that peculiar qualities enable identification. (shrink)

The book is a contribution on the early Stoics’ views of action, responsibility and freedom. The central claim, which sets the framework of its three chapters, is that an influential interpretation according to which the Stoics’ concept of responsibility is entirely separate from their concept of freedom (S. Bobzien) is mistaken. The present interpretation does conserve a compatibilist reading but the claim is made that if a person is responsible for an action it is so on the basis of features (...) which make his or her action also (potentially) virtuous and free. Moreover, if responsibility is thought and presented as a kind of paradox, it is the same paradox which is recognizable as a foundaon of virtue and freedom. It is important for this interpretation to see responsibility as based on assent (and not merely on one’s – determined – nature/character) and to see the corresponding compatibilism as a result of a two-sided mental act which is then also to be found in the exercise of virtue. By defending these views, the book offers a unified Stoic theory of action in which psychology (assent) and ethics (virtue and freedom) presuppose similar reflective turns in the soul though on different levels of the soul’s activity. (shrink)

There is a traditional conception of knowledge but it is not the Justified True Belief analysis Gettier attacked. On the traditional view, knowledge consists in having a belief that bears a discernible mark of truth. A mark of truth is a truth-entailing property: a property that only true beliefs can have. It is discernible if one can always tell that a belief has it, that is, a sufficiently attentive subject believes that a belief has it if and only if it (...) has it. Requiring a mark of truth makes the view infallibilist. Requiring it to be discernible makes the view internalist. I call the view Classical Infallibilism. (shrink)

This paper explores what Epictetus thinks we need to learn in order to acquire the art of living, and, in doing so, illuminates the central tenets of Epictetus’ epistemology. It argues that we need to have cognition of preconceptions–innate, self-evident, general, ethical truths–and we need to know how to apply them. We acquire this “know-how” through habituation and, with it, are able to have cognition of correct applications.

This paper articulates Epictetus's moral epistemology. The argument of the paper is that the famous Stoic "art of living" is best thought of as a science or kind of knowledge, and that, in his conception of knowledge, Epictetus is an orthodox Stoic, upholding the main tenets of Stoic epistemology. Thus, what exactly the art of living is and how it can be acquired can be better understood by understanding Stoic epistemology.

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 book argues that Augustine assimilated the Stoic theory of perception and mental language (lekta/dicibilia), and that this epistemology underlies his accounts of motivation, affectivity, therapy for the passions, and moral progress. Byers elucidates seminal passages which have long puzzled commentators, such as Confessions 8, City of God 9 and 14, Replies to Simplicianus 1, and obscure sections of the later ‘anti-Pelagian’ works. Tracking the Stoic terminology, Byers analyzes Augustine’s engagement with Cicero, Seneca, Ambrose, Jerome, Origen, and Philo of Alexandria, (...) demonstrating that Augustine appropriated Stoicism with greater sophistication than other religious writers. She also shows how he moved beyond the Stoics by enriching Stoic cognitivism with Platonic motivational theory, arguing that Augustine created a coherent synthesis. This newly discovered Augustinian moral psychology has elements that contemporary philosophers and psychologists have identified as important. (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.

Abstract Can the wise person be fooled? The Stoics take a very strong view on this question, holding that the wise person (or sage) is never deceived and never believes anything that is false. This seems to be an implausibly strong claim, but it follows directly from some basic tenets of the Stoic cognitive and psychological world-view. In developing an account of what wisdom really requires, I will explore the tenets of the Stoic view that lead to this infallibilism about (...) wisdom, and show that many of the elements of the Stoic picture can be preserved in a more plausible fallibilist approach. Specifically, I propose to develop a Stoic fallibilist virtue epistemology that is based on the Stoic model of the moral virtues. This model of the intellectual virtues will show that (in keeping with a folk distinction) the wise person is never befooled, though that person might be fooled. Content Type Journal Article Pages 1-14 DOI 10.1007/s12136-012-0158-0 Authors Sarah Wright, Department of Philosophy, University of Georgia, 107 Peabody Hall, Athens, GA 30602, USA Journal Acta Analytica Online ISSN 1874-6349 Print ISSN 0353-5150. (shrink)

This book offers a reconstruction of the early Stoic doctrine of prolepsis, revealing it to be much closer to Platonic recollection in certain respects than ...