This volume reprints eight of Anil Gupta's essays, some with additional material. The essays bring a refreshing new perspective to central issues in philosophical logic, philosophy of language, and epistemology. Gupta argues that logical interdependence is legitimate, and that it provides a key to understanding a variety of topics of interest to philosophers--including truth, rationality, and experience. The essays are highly accessible and provide a good introduction to ideas Gupta has been developing over the last three decades.