This book highlights the legacy of the Lvov-Warsaw School in broadly understood contemporary philosophy of language. Fundamental methodological issues, important topics in syntax, semantics and pragmatics (such as modern Categorial Grammar, theories of truth, game-theoretical semantics, and argumentation theory) are tracked down to their origins in the Lvov-Warsaw School, and – the other way round – modern renderings of the ideas expressed by Kazimierz Ajdukiewicz, Tadeusz Kotarbiński, Stanisław Leśniewski, Jan Łukasiewicz, Alfred Tarski, Kazimierz Twardowski, and other members of the School are presented. Among contributors there are philosophers, logicians, formal linguists and other specialists from France, Italy, Poland, and Spain.