This is a collection of five essays debating the nature and scope of ancient scepticism, and providing an introduction to the thought of the original sceptics.

The first comprehensive, up-to-date treatment of Greek sceptism, from the beginnings of epistemology with Xenophanes, to the final full development Pyrrhonism a

Scepticism, a philosophical tradition that casts doubt on our ability to gain knowledge of the world and suggests suspending judgement in the face of uncertaint

Five Modes of Scepticism examines the argument forms that lie at the heart of Pyrrhonian scepticism as expressed in the writings of Sextus Empiricus. These are

What is knowledge? Is it the same as opinion or truth? Do you need to be able to justify a claim in order to count as knowing it? How can we know that the outer