Anna Brożek. Born 1980 in Cracow (Poland). A pianist and a philosopher. She is the author of seven books (i.a. Kazimierz Twardowski. Die Wiener Jahre, Springer 2011; Theory of Questions, Rodopi 2011) and a few dozen of articles in logical semiotics, methodology, ontology, history of Polish philosophy, and musicology.Jacek Jadacki. Born 1946 in Puchaczów (Poland). A pianist and a philosopher; titular professor of philosophy. He is the author of many books on philosophy, logic and their history and a few hundred papers of logical semiotics, methodology, ontology, axiology, and history of Polish philosophy.

• I. MethodsII. Psychology and SemioticsIII. MetaphysicsIV. Ethics and AestheticsV. CoryphaeiBibliographyName Index

Anna Brożek. Born 1980 in Cracow (Poland). A pianist and a philosopher. She is the author of seven books (i.a. Kazimierz Twardowski. Die Wiener Jahre, Springer 2011; Theory of Questions, Rodopi 2011) and a few dozen of articles in logical semiotics, methodology, ontology, history of Polish philosophy, and musicology.Jacek Jadacki. Born 1946 in Puchaczów (Poland). A pianist and a philosopher; titular professor of philosophy. He is the author of many books on philosophy, logic and their history and a few hundred papers of logical semiotics, methodology, ontology, axiology, and history of Polish philosophy.

• I. MethodsII. Psychology and SemioticsIII. MetaphysicsIV. Ethics and AestheticsV. CoryphaeiBibliographyName Index

Anna Brożek. Born 1980 in Cracow (Poland). A pianist and a philosopher. She is the author of seven books (i.a. Kazimierz Twardowski. Die Wiener Jahre, Springer 2011; Theory of Questions, Rodopi 2011) and a few dozen of articles in logical semiotics, methodology, ontology, history of Polish philosophy, and musicology.Jacek Jadacki. Born 1946 in Puchaczów (Poland). A pianist and a philosopher; titular professor of philosophy. He is the author of many books on philosophy, logic and their history and a few hundred papers of logical semiotics, methodology, ontology, axiology, and history of Polish philosophy.

• I. MethodsII. Psychology and SemioticsIII. MetaphysicsIV. Ethics and AestheticsV. CoryphaeiBibliographyName Index