This volume consists of papers delivered at the conference 'The Lvov-Warsaw School and Contemporary Philosophy', organised in celebration of the hun dredth anniversary ofKazimierz Twardowski's first lecture as Professor of Phi losophy at Lvov University. This lecture can be regarded as the starting point of the development of analytic philosophy in Poland, which culminated in the Warsaw School of Logic. The conference was held in Lvov (15-17 November) and Warsaw (19-21 November 1995). It was organised jointly by the Ukrainian Academy of Sci ences and the Polish Academy of Sciences. The general organisation was un dertaken by Professor Andrzej Grzegorczyk (polish Academy of Sciences) and Professor Marat Vernikov (Ukrainian Academy of Sciences). Professors Jaroslaw Isaievich (Ukrainian Academy of Sciences) and Jan Wolenski (Jagiel Ionian University) were responsible for the scientific programme. Over 100 philosophers participated in the conference. Papers published in this volume are organised according to the sections of the conference and rep of the papers delivered. resent a selection The editors would like to express their gratitude to Professor Andrzej Grze gorczyk, spiritus movens of the conference, who, by including the present vol ume in a programme of publications connected with the hundredth anniversary of the Lvov-Warsaw School, provided financial support for its preparation. Fi nally, we express our gratitude to Dr Timothy Childers of the Academy of Sciences of the Czech Republic for correcting the English of the papers.

Inhalt
The Reception of the Lvov-Warsaw School.- I. History and Comparisons.- Twardowski's Distinction Between Actions and Products.- On Ajdukiewicz's Empirical Meaning-Rule and Wittgenstein's Defining Criterion.- Inspirations and Controversies: From the Letters between K. Twardowski and A. Meinong.- The Lvov-Warsaw School the First School of Non-positivist Scientific and Analytic Philosophy.- Women's Contributions to the Achievements of the Lvov-Warsaw School: a Survey.- Truth-Bearers from Twardowski to Tarski.- Twardowski and Husserl on Wholes and Parts.- The Rationalistic Paradigm of Franz Brentano and Kazimierz Twardowski.- ?ukasiewicz's Interpretation of Aristotle's Concept of Possibility.- II. Le?niewski.- De Veritate: Another Chapter. The Bolzano-Le?niewski Connection.- Le?niewski's Conception of Logic.- Non-elementary Exegesis of Twardowski's Theory of Presentation.- On Some Essential Subsystems of Les?iewski's Ontology and the Equivalence between the Singular Barbara and the Law of Leibniz in Ontology.- III. Philosophy of Language.- The Paradox of Grelling and Nelson Presented as a Veridical Observation Concerning Naming.- D?mbska, Quine and the So-called Empty Names.- Truth and Time.- The Postulate of Precision: Its Sense and Its Limits.- Polish Logic, Language and Philosophy of Language.- IV. Logic and the Foundations of Mathematics.- The Ajdukiewicz Calculus, Polish Notation and Hilbert-style Proofs.- Ja?kowski and Gentzen Approaches to Natural Deduction and Related Systems.- The Contribution of Polish Logicians to Recursion Theory.- Studying Incompleteness of Information: A Class of Information Logics.- V. Ontology, Epistemology, Philosophy of Science.- On ?ukasiewicz's Theory of Probability.- On What There Is Not a Vindicationof Reism.- On the Concept of a Subject of Cognition in Ajdukiewicz's Philosophy.- Induction and Probability in the Lvov-Warsaw School.- ?ukasiewicz's Logical Probability and a Puzzle about Conditionalization.- VI. Logic and Philosophy.- Truth as Consensus. A Logical Analysis.- The Lvov-Warsaw School and the Problem of a Logical Formalism for General Systems Theory.- From Closure-operatic Deductive Methodology to Non-standard Alternatives.- Forgotten and Neglected Solutions of Problems in Philosophical Logic.- Index of Names.