Abstract: Introduction – The Pyrrhonian Problematic – The Problem of the Criterion – Cartesian Skepticism: Arguments and Antecedents – Hume's Skepticism – Skepticism about the External World – Skepticism about Induction – Skepticism about A Priori Justification: Self-Evidence, Defeasibility, and Cogito Propositions – Moral Realism, Quasi Realism, and Skepticism – Religious Skepticism – Live Skeptical Hypotheses – Berkeley's Treatment of Skepticism – Kant's Response to Skepticism – Reid's Response to the Skeptic – Peirce and Skepticism – Moore and Skepticism – Austin's Way with Skepticism – Wittgenstein on Certainty – The Relativist Response to Radical Skepticism – Ascriber Contextualism – Sensitivity, Safety, and Antiluck Epistemology – Closure and Alternative Possibilities – Contemporary Responses to Agrippa's Trilemma – Externalist Responses to Skepticism – Internalist Responses to Skepticism – Virtue-Theoretic Responses to Skepticism – Disjunctivism and Skepticism

Keywords: argument, Cartesian, common sense, context, contextualism, disjunct, epistemology, evidence, external world, induction, justification, moral realism, problematic, proposition, quasi-realism, regress, relativism, virtue, closure, Pyrrho