This collection of essays includes important and influential work on the concept of truth and the semantic paradoxes, particularly the Liar paradox. Using techniques of mathematical logic, the papers tackle this age-old problem to offer new insights and widely varying analyses. The distinguished contributors include Tyler Burge, Alonzo Church, Solomon Feferman, Anil Gupta, Hans G. Herzberger, Saul Kripke, Robert L. Martin, Charles Parsons, Brian Skyrms,...