A logical introduction to philosophyde Richard L. PurtillMateriasIntroductionsPhilosophyLogicPhilosophy, introductionsEdiciones (1)A logical introduction to philosophy (1989)Prentice Hall · inglésMás obras de Richard L. PurtillPPhilosophical QuestionsPhilosophical QuestionsRReason to believeReason to believeMoral dilemmas : readings in ethics and social philosophy