Example image of eyePlorer eyePlorer map for 'Jean Nicod': 1893 1924 February 16 France Logic Philosophy Propositional calculus Sheffer stroke Tuberculosis Carl Gustav Hempel Raven paradox Cognitive science French National Centre for Scientific Research Institut Jean Nicod Social sciences Jean Nicod Prize MIT Press Philosophy of mind Encyclopædia Britannica Bertrand Russell Daniel Dennett List of members of Slovenian Academy of Sciences and Arts List of logicians List of Princeton University people Laws of Form Propositional formula