Ancient Greek and Roman Epistemology

This paper examines an ancient debate over the rationality of perception. What leads the Stoics to affirm, and the Epicureans to deny, that to form a sense-impression is an activity of reason? The answer, we argue, lies in a disagreement over what is required for epistemic success. For the Stoics, epistemic success consists in believing the right propositions, and only rational states, in virtue of their predicational structure, put us in touch with propositions. Since they identify some sense-impressions as criteria (...) of truth and thus as the basis for epistemic success, the Stoics maintain that sense-impressions must be rational. The Epicureans agree with the Stoics that sense-impressions function as criteria of truth, and also agree broadly on what it means for a state to be rational, but deny that sense-impressions are rational because (1) they think that epistemic success must be supported by a state that is necessarily error-free and (2) accept that rational states can be false. In reconstructing this debate, we refine the standard interpretation of the fundamental difference between Epicurean and Stoic epistemology and also develop parallels with epistemological debates today. One upshot is a more nuanced appreciation of the merits of Epicurean epistemology vis-à-vis the Stoics. (shrink)

I offer an examination of a core element in the reflectiveness of Heraclitus’ thought, namely, his rebuke of polymathy . In doing so, I provide a response to a recent claim that Heraclitus should not be considered to be a philosopher, by attending to his paradigmatically philosophical traits. Regarding Heraclitus’ attitude to that naïve form of ‘wisdom’, i.e., polymathy, I argue that he does not advise avoiding experience of many things, rather, he advises rejecting experience of things as merely many (...) independent things in their manifoldness , and, instead, to understand their unity and thereby to unify our knowledge of them. (shrink)

In this paper, I examine Cicero’s oft-neglected De Divinatione, a dialogue investigating the legitimacy of the practice of divination. First, I offer a novel analysis of the main arguments for divination given by Quintus, highlighting the fact that he employs two logically distinct argument forms. Next, I turn to the first of the main arguments against divination given by Marcus. Here I show, with the help of modern probabilistic tools, that Marcus’ skeptical response is far from the decisive, proto-naturalistic assault (...) on superstition that it is sometimes portrayed to be. Then, I offer an extended analysis of the second of the main arguments against divination given by Marcus. Inspired by Marcus’ second main argument, I formulate, explicate, and defend a substantive principle of scientific methodology that I call the “Ciceronian Causal-Nomological Requirement” (CCR). Roughly, this principle states that causal knowledge is essential for relying on correlations in predictive inference. Although I go on to argue that Marcus’ application of the CCR in his debate with Quintus is dialectically inadequate, I conclude that De Divinatione deserves its place in Cicero’s philosophical corpus, and that ultimately, its significance for the history and philosophy of science ought to be recognized. (shrink)

In his Exhortation to Philosophy (Protrepticus), the Neoplatonic philosopher Iamblichus famously preserves material culled from lost works of ancient philosophy, including dialogues of Aristotle. He also preserves a work entitled On Wisdom and ascribed to the Pythagorean philosopher Archytas of Tarentum, who was a friend and challenger of Plato. The text On Wisdom is a later Hellenistic production, probably written in the 1st century BCE, but it presents an important piece in the puzzle of reconstructing Pythagoreanism for the Hellenistic and (...) Post-Hellenistic periods. On Wisdom provides ps-Archytas' views on the nature, pursuit, and purposes of philosophy, as well as the division of the parts of knowledge. This article presents the first complete modern translation into English and analysis of this work, whilst also explaining the precise ways in which its first critic, Iamblichus, appropriates its content to Neoplatonic theories. (shrink)

The paper offers a running commentary on ps-Archytas’ On Intellect and Sense Perception (composed ca. 80 BCE), with the aim to provide a clear description of Hellenistic/post-Hellenistic Pythagorean epistemology. Through an analysis of the process of knowledge and of the faculties that this involves, ps-Archytas presents an original epistemological theory which, although grounded in Aristotelian and Platonic theories, results in a peculiar Pythagorean criteriology that accounts for the acquisition and production of knowledge, as well as for the specific competences of (...) each cognitive faculty. (shrink)

The philosophical practices undertaken in Plato's Academy remain, in the words of Cherniss, a 'riddle'. Yet surviving accounts of the views of the first two scholarchs of Plato's Academy after his death, Speusippus and Xenocrates, reveal a sophisticated engagement with their teacher's ideas concerning the pursuit of knowledge and the ends of philosophy. Speusippus and Xenocrates transform Plato's views on epistemology and happiness, and thereby help to lay the groundwork for the transformation of philosophy in the Hellenistic era.

Seneca asserts in Letter 121 that we mature by exercising self-care as we pass through successive psychosomatic “constitutions.” These are babyhood (infantia), childhood (pueritia), adolescence (adulescentia), and young adulthood (iuventus). The self-care described by Seneca is 'self-affiliation' (oikeiōsis, conciliatio) the linchpin of the Stoic ethical system, which defines living well as living in harmony with nature, posits that altruism develops from self-interest, and allows that pleasure and pain are indicators of well-being while denying that happiness consists in pleasure and that (...) pain is misery. Augustine divides the narrative of his own development into the stages of babyhood (infantia), childhood (pueritia), adolescence (adulescentia), and young adulthood (iuventus) in the Confessions, a text wherein he claims familiarity with more than a few works of Seneca (Conf. 5.6.11). Furthermore, he had access to Stoic accounts of affiliation not only in Seneca’s Letter 121, but also in Cicero’s On Goals, and in non-extant sources of Stoic ethical theory. After pointing out that Augustine endorsed the notion of self-affiliation outside of the Confessions, I raise the question of whether he also makes the notion of affiliation thematic in his philosophical autobiography. I argue that he does indeed present himself and some of his primary relationships – with his mother and his long-term girlfriend – in terms of personal and social oikeiōsis. In addition, his self-critiques in the early books of the Confessions can be more fully understood if compared to Stoic developmental theory. He depicts himself as failing to progress intellectually, socially, and morally: although he passed through the successive constitutions, becoming physically larger and cognitively capable, he did not mature correctly by the standards of his Stoic sources. (shrink)

In fragment B 18 (DK) Xenophanes asserts that ‘Not from the outset did the gods reveal all things to mortals’ but that ‘in time, as they seek, men discover better.’ The remark has been understood in different ways but is usually read as a rejection of the view of the gods as the givers of all good things and an expression of faith in the capacity of human beings to make progress through their own efforts. I argue that the ‘hymn (...) to progress’ reading of B 18 is unjustified by any other aspect of Xenophanes’ thought and at odds with his generally dour view of the intelligence and character of his fellow citizens. A detailed analysis of the fragment supports the view that Xenophanes is here rejecting belief in divine revelation through natural signs and affirming the value of historiê or inquiry in the form of travel and direct observation. (shrink)