  Twardowski himself favoured descriptive psychology as basic, but many of his students found logic to be the most important source of methodological criteria for philosophy. Perhaps Łukasiewicz was the most radical in this respect. According to him, a reform of philosophy was needed in order to avoid errors of the past. Philosophy should proceed as logic does, axiomatically starting from clear concepts and evident principles. Other philosophers of the LWS were more modest and did not demand that philosophy should be axiomatized. However, logical analysis of philosophical discourse became the standard method of analysis. Yet the task of philosophy is not limited to the analysis of language. Thus, philosophy, according to methodological claims of the LWS, was analytic but not purely linguistic. Philosophy is concerned with the world but it mainly (though not ‘only’) performs its task also by the analysis of language, which is used in speaking about reality. This view about philosophy is to be contrasted with that of the Vienna Circle. In particular, the LWS was not interested in a general metaphilosophical scheme that sharply divided philosophy into good and bad, but rather with an analysis of concrete problems. Thus, the LWS was united more by a common methodological attitude and very general claims concerning rationality than by a commonly accepted philosophical theory.