Jeremie Hebrard

The aim of this paper is to examine the considerations on stochastic arts in Antiquity and to show how Galen’s analysis concerning the “art of conjecturing” constitutes a preferable alternative to the traditional ways used by philosophers to explain the inherent fallibility in the medical art. By distinguishing the scientific diagnosis from the conjectural one, Galen encompasses all cases relevant to the medical art. The former, because of its general nature, can be theorized. As for the latter, it concerns only the individual and is therefore not likely to enter the theory, except by the method that makes it possible. This paper attempts to outline the modus operandi underlying the technical conjecture in order to illustrate Galen’s deftly developed position on a subject almost exclusively investigated by philosophers until then.

This is the first French translation of Galen’s De optima doctrina, which articulates his view “On the Best Teaching”. The translation is preceded by an introduction on the context in which this text was written, especially on the relationship of Galen towards scepticism in general and Favorinus of Arles in particular. Although it is hard to characterize this “treatise” in terms of its date of redaction and its form, nonetheless it yields clear information on Galen’s critiques with regards to the “Platonists” and the “Pyrrhonists”.

This contribution gives an overview of the few passages of Ancient Greek literature dealing with the causes of epidemics and contagions (i.e. in Hippocrates, Thucydides, Isocrates, ps-Aristotle’s Problems, Plutarch, and Galen). With the help of the distinction between an ontological and a physiological conception of what a disease is, I suggest that the latter was an obstacle to better understand the process through which epidemics spread. I nonetheless show that the ontological conception of these diseases was not entirely absent from Antiquity, as it is shown by Galen, who offers an etiological explanation of the origin of epidemics that combines both conceptions, the ontological and the physiological one.