Introduction: Metaphysical disputes over realism -- Semantic values -- Inference and truth -- Theories of truth -- Meaning, knowledge, and understanding -- Ingredients of meaning -- truth and meaning-theories -- The origin and role of the concept of truth -- The justification of deduction -- Circularity, consistency, and harmony -- Holism -- Proof-theoretic justifications of logical laws -- The fundamental assumption -- Stability -- Truth-conditional meaning-theories -- Realism and the theory of meaning