The five modes are a list of tools used by ancient sceptics to guide dogmatic people towards suspending their judgement. Attributed to Agrippa and used extensively by Sextus Empiricus, these modes are still widely discussed today by epistemologists and specialists in ancient philosophy. Scholars disagree, however, on how to understand the way the five modes are used together and what the logical form of the sceptical strategy behind their deployment is. This paper offers a reconstruction of the system of the (...) five modes that avoids these problems. In specific, unlike previous reconstructions, it includes a non-trivial version of the mode of relativity, avoids committing the sceptic to a normative principle and follows the textual evidence more closely. Moreover, I argue that the system can be better understood as a list of steps in a process, whose underlying logic can be expressed by a single algorithm. (shrink)

Pyrrhonian skeptics, according to Sextus Empiricus, suspend judgment in the face of equally strong oppositions, but they also continue to investigate. This joint characterization has puzzled scholars: Why keep investigating if the evidence demands epochē? On this point, Sextus has been accused of muddled thinking at best and incoherence at worst. In this paper, I explain how investigative activity harmonizes with the suspensive mindset. My interpretation helps to explain several puzzling features of Pyrrhonian philosophy in addition to the idea that (...) one can both suspend judgment and continue investigating. (shrink)

The purpose of the present article is to show that the key to understanding the philosophical meaning of the Two Modes of Scepticism is directly linked to the metaepistemic function performed by the criterion of truth (kriterion tes aletheias) in the Hellenistic theories of knowledge. Since the criterion can also be regarded as an epistemic instrument through which it is possible to immediately identify the foundational elements upon which our knowledge of the world is based, the Two Modes show the (...) problems that arise when we try to incontrovertibly identify a set of special and foundational elements that have no need of further justification. (shrink)