PM Directory References Discover What Is the Most Widely Practiced Religion in the World? What Do Eggs Have to Do with Easter? Where Is “Old Zealand”? Timeline of the 1990s The Seven Sacraments of the Roman Catholic church How Deadly Is Quicksand? 9 Things You Might Not Know About Adolf Hitler Contents Ask the Chatbot a Question PM logic Ask the Chatbot a Question Learn about this topic in these articles:major reference In formal logic: Axiomatization of PC…Bertrand Russell, is often called PM:Read More Britannica ChatbotChatbot answers are created from Britannica articles using AI. This is a beta feature. AI answers may contain errors. Please verify important information using Britannica articles. About Britannica AI.
