Stoics: Epistemology

The early Greek Stoics were the first philosophers to recognize the object of normal human perception as predicative or propositional in nature. Fundamentally we do not perceive qualities or things, but situations and things happening, facts. To mark their difference from Plato and Aristotle, the Stoics adopted phantasia as their word for perception.

I show how the familiar Stoic paradoxes were developed by reflecting on Socrates.

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 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)

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

The Roman Stoics hold that all humans possess the seeds of virtue and wisdom and innately develop certain natural concepts alternately called ' prolepseis,' 'koinai ennoiai,' or 'phusikai ennoiai.' This dissertation addresses the relation between these doctrines, concept-formation, and intellectualist psychology in the Early Stoa. The prevailing view is that the 'empiricism' of the Early Stoa precludes interpreting prolepsis and koine ennoia as tacitly functioning innate ideas; rather, the Roman Stoics are influenced by Platonic recollection. I argue to the contrary (...) that this interpretation is well grounded in the extant fragments from Chrysippus. ;Chapter One examines the evidence for regarding 'prolepsis,' 'koine ennoia,' and ' phusike ennoia' as technical terms designating a single Chrysippean doctrine. Chapter Two shows that the Stoic theory of concept-formation poses serious difficulties concerning the criterial function and scope of prolepsis and koine ennoia. These problems are addressed in Chapters Three and Four respectively. I conclude that they can be resolved by interpreting prolepsis and ennoia as successive stages in the development of reason. Specifically, I argue that prolepsis is a form of tacit knowledge that is providentially guaranteed to be true whereas koinai ennoiai are the articulations of prolepseis that serve as criteria for evaluating other beliefs. Since prolepseis and koinai ennoiai have identical propositional content, the Stoics tend to use the terms interchangeably, leading to confusions in both ancient sources and recent scholarship. ;Chapters Five and Six examine the historical and philosophical context of Stoic prolepsis. I suggest that the doctrine is appropriated from Epicurus in two stages. Academic criticism of the first stage has led to the 'empiricist' reading of Stoic epistemology. However, in response to this criticism Chrysippus develops the dispositional innatism that is preserved in the Roman Stoics' metaphor of seeds of virtue and wisdom. Plato's dialogues are influential throughout the formation of this theory. The Stoics regard their intellectualist psychology and science of dialectic as the true Socratic philosophy and offer prolepsis as an alternative to Platonic recollection. I conclude by suggesting that in the Roman period Stoic prolepsis is used to reformulate Platonic recollection as a theory of dispositional innatism. (shrink)

The Stoic theory of knowledge was founded by Zeno on a perceptual and crudely materialistic base, but subsequently developed into an elaborate theory involving λεκτ which has proved difficult to reconstruct. The evolution of the school, influenced not only by internal differences but also by interaction with the Platonic Academy, certainly contributed to this development. Hence any adequate reconstruction of the Stoic theory of knowledge must take account of the differences among the positions of the different representatives of the school (...) with respect to the criticism put foward by the Academics. I propose here to clarify Zeno's position, showing how Arcesilaus' criticism helped to expose certain lacunae and thus to bring about changes in doctrine on the part both of Zeno himself and of his immediate successors. (shrink)

A number of late Stoic sources describe either ethical concepts or a supposed universal belief in gods as being innate in the human animal. Though Chrysippus himself is known to have spoken of "implanted preconceptions" (ἔμφυτοι προλήψεις) of good and bad, scholars have typically argued that the notion of innate concepts of any kind would have been entirely incompatible with his theory of knowledge. Both Epictetus' notion of innate concepts of good and bad and the references to an innate belief (...) in gods by other philosophers of the Roman era are thus generally held to be later developments, probably owing to a Platonist-Stoic syncretism. Review of the evidence, however, shows that Chrysippus, like Epictetus, held ethical concepts to represent a special category of conception in that their formation was guaranteed by oikeiôsis. Unlike other concepts, that is, these represent a formal conceptualization of an innate tendency to distinguish between things fitting for one's constitution and things not fitting that all animals, according to the Stoics, bring to their empirical experiences. While the notion that human belief in gods is similarly innate does seem to have been a later development, it too was explained with reference to oikeiôsis rather than resulting from a simple "syncretism.". (shrink)

This paper argues for a view that maximizes in the Stoics' epistemology the starkness and clarity characteristic of other parts of their philosophy. I reconsider our evidence concerning doxa (opinion/belief): should we really take the Stoics to define it as assent to the incognitive, so that it does not include the assent of ordinary people to their kataleptic impressions, and is thus actually inferior to agnoia (ignorance)? I argue against this, and for the simple view that in Stoicism assent is (...) either, in the case of the fool, doxa = agnoia, or alternatively, in that of the sage, epistêmê (knowledge). This view, together with reflection on the appropriate sense of "between" in the relevant reports of SE and Cicero, yields a sympathetic reading of an otherwise problematic challenge Sextus reports Arcesilaus as having prepared for the Stoic claim that katalêpsis, which is the criterion of truth, is between knowledge and opinion; on my view each side is proceeding in a philosophically legitimate way. (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)

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)

THE PROTAGONISTS David Sedley The primary object of this historical introduction1 is to enable a reader encountering Hellenistic philosophy for the first ...

Looks at evidence for Seneca's reception of Stoic epistemology and argues that such knowledge was a factor in determining his style of writing and didactic methods.

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)