John Greco is the Leonard and Elizabeth Eslick Chair in Philosophy at Saint Louis University. His previous publications include Putting Skeptics in their Place: The Nature of Skeptical Arguments and their Role in Philosophical Inquiry (Cambridge, 2000). He is also the editor of The Oxford Handbook of Skepticism (2008), Sosa and his Critics (2004) as well as co-editor of Rationality and the Good (2007) and The Blackwell Guide to Epistemology (1999).