The volume aims to show the variety of research currents of the Lvov-Warsaw School and the ways in which these currents are developed today. The content of the book is divided into three parts: “Logic and Semiotics”, “Metaphysics and Ontology”, and “Psychology and Sociology”.

The title of this book refers to the tension between formal and informal elements in the ways analytical philosophy is practiced. The authors examine questions of the scopes and limits of both kinds of research methods.