This collection of newly comissioned essays by international contributors offers a representative overview of the most important developments in contemporary philosophical logic.

• Presents controversies in philosophical implications and applications of formal symbolic logic.
• Surveys major trends and offers original insights.

Dale Jacquette is Professor of Philosophy at the Pennsylvania State University. He is the author of Philosophy of Mind (1994), Meinongian Logic: The Semantics of Existence and Nonexistence (1996), Wittgenstein's Thought in Transition (1998), Symbolic Logic (2001), David Hume's Critique of Infinity (2001), and On Boole: Logic as Algebra (2001), as well as numerous articles on logic, metaphysics, philosophy of mind, and Wittgenstein. He is editor of Philosophy of Mathematics: An Anthology (Blackwell 2001) and Philosophy of Logic: An Anthology (Blackwell 2001).