"must be true" - related articles and key terms

Related terms: conditional connective   reprinted with commentary   socrates is mortal   problems of philosophy   semantic content   true and false   logical implication   laws of thought   logical disjunction   double negation   second kind   books of the western world   great books of the western   van heijenoort   law of excluded middle   modus ponens   then we   two parts   formal system

Wikipedia sources: What the Tortoise Said to Achilles   Law of excluded middle


Context for words: must   be   true