  Most philosophers of the LWS understood philosophy as a collection of disciplines, including logic, ethics, aesthetics, metaphysics, and epistemology. Philosophy is a science, like any other. All members of the LWS inherited from Twardowski his main metaphilosophical claims concerning clarity, justification and the separation of philosophy from world-views. It also meant a radical rejection of all kinds of irrationalism. A view, called anti-irrationalism by Ajdukiewicz, demanded that every rationally accepted proposition be intersubjectively communicable and testable. Although there was no a priori list of meaningful questions subjected to philosophical work, one should be sceptical about so-called great metaphysical problems and their scientific status. Philosophical activity must begin with a very careful linguistic analysis of investigated problems and their meaning. 