Le célèbre incipit du Peri theon (80 B 4 DK = 31 D 10 Laks-Most), dans lequel Protagoras affirmait être dans l’incapacité de savoir si les dieux existent ou non, joue sans aucun doute un rôle important dans l’histoire de l’athéisme ancien dans la mesure où il permet, comme le souligne David Sedley, de reconstruire un contexte culturel dans lequel la négation de l’existence des dieux était considérée comme une thèse philosophique digne d’être discutée. La présente contribution portera sur les (...) principaux problèmes exégétiques relatifs au fragment protagoréen. Dans un premier moment, nous nous occuperons de la question de la constitution du texte. Nous considérerons ensuite l’historicité de la tradition biographique concernant la persécution judiciaire du sophiste, qui est évoquée par la plupart des sources citant le fragment. Finalement, nous essayerons d’étudier le fragment de Protagoras dans le cadre de la tradition philosophique et littéraire qui le précède et de l’analyser à la lumière de la réflexion philosophique du sophiste lui-même, afin de mieux comprendre le point de vue sur les dieux et la religion que Protagoras exprimait dans son écrit. (shrink)

According to a fragment of Porphyry (410 F Smith = 80 B 2 DK), containing a dialogue on the theme of plagiarism, Plato made use of the same arguments as Protagoras’ Περὶ τοῦ ὄντος against monistic thinkers, most likely the Eleatics. My paper aims to analyse Porphyry’s testimony to assess some aspects of Protagoras’ reflection on being through a comparison with parallel sources, in particular Plato’s dialogues (Theaetetus, Euthydemus, Sophist, Parmenides). I conclude that it is plausible to suppose that, within (...) the framework of a more general reflection on ὀρθοέπεια, Protagoras viewed the notion of being in Περὶ τοῦ ὄντος from a linguistic perspective. (shrink)

In his refutation of skepticism in book IV of De rerum natura, Lucretius uses argumentative methods typical of Epicurus: the περιτροπή is in many ways similar to that used by the philosopher in book XXV of Περὶ φύσεως, the same book where, in a passage dedicated to the criticism against determinists, can be found a reference to the criterion of the πρόληψις, that Lucretius exploits in his refutation. Moreover, Lucretius develops a strong demonstration concerning the irrefutability of αἴσθησις as a (...) criterion of truth, which finds significant points of contact with a large fragment, transmitted by Diogenes Laertius and generally traced back to the Canon of Epicurus. The last argument used by the poet is a pragmatic one: for the skeptic it would be impossible to live. The argument is similar to the praxis-based argument used by Epicurus in the Περὶ φύσεως against the partisans of determinism. But the pragmatic argument goes back to a very ancient layer of anti-skeptical polemics, even prior to Epicurus and already present in book Γ of Aristotle’s Metaphysics. Although later influences cannot be excluded, Lucretius appears to be a faithful witness of Epicurus. Probably in a lost section of the Περὶ φύσεως, the philosopher of Samos showed positions going against skeptical or proto-skeptical attitude, contemporary or earlier to the time of the philosopher, probably developed in a Democritean or a Socratic context. Epicurus’ ad hominem strategy is very close to that of the philosopher in the Principal Doctrines XXIII–XXV, and certainly follows Aristotle’ strategy in book Γ of Metaphysics against those who deny the principle of non-contradiction. In a similar way, Epicurus does not have one figure as the objective of his refutation but constructs a hypothetical dialectical opponent capable of embodying a series of philosophical tendencies judged by the founder of Kepos to be extremely dangerous not only for the correct exercise of thought but for the human being’s life itself. (shrink)

The great speech of the Protagoras still leaves many questions open. Particularly striking is the presence of doctrines that later on will be taken up and further developed by Plato in such dialogues as the Politicus, the Timaeus and the Laws. For this reason, many scholars tend to think that the words of Protagoras are just a product of Plato’s invention that bear no relation to Protagoras’ actual doctrines. Nevertheless, it is possible to propose a different interpretation. At the beginning (...) of the Protagoras, Socrates develops the image of the sophist as the merchant of various μαθήματα: to sell his products, the sophist praises them all indiscriminately without knowing which of them are useful and which are harmful. But he who has the ability to make this distinction can still purchase the μαθήματα from Protagoras or anyone else. Through the dialectic, Plato is able to examine them without any danger in the Protagoras and then take them up and further develop in new ways in his later dialogues. (shrink)