The thesis that, in a system of natural deduction, the meaning of a logical constant is given by some or all of its introduction and elimination rules has been developed recently in the work of ...

The perfect fit of syntactic derivability and logical consequence in first-order logic is one of the most celebrated facts of modern logic. In the present flurry of attention given to the semantics of ...

To solve the puzzle, you need a type of logic called deductive reasoning. What is logic and how are logic and math related? Logic is the systematic study of valid rules of inference. Logic clarifies.