Symbolic Logic Directory References Discover Causes of the Great Depression 10 of the World’s Most Dangerous Fish Why Was Nazi Germany Called the Third Reich? The Fastest Animals on Earth Will Light-Speed Space Travel Ever Be Possible? 6 Questions About the History of Money and Banking Answered 9 of the World’s Deadliest Snakes Contents Symbolic Logic work by Lewis and Langford Ask the Chatbot a Question Ask the Chatbot a Question Learn about this topic in these articles:modality In modality… and Cooper Harold Langford in Symbolic Logic (1932), which develops a modal system of “strict implication” for interpreting the logical force of “if . . . then.”Read More