Propositional logic is also called propositional calculus, sentential logic, statement logic and sentence logic. It is a formalism that is useful for analyzing certain arguments (deductions) that ...

A propositional system of modal logic is second-order if it contains quantifiers ∀p and ∃p, which, in the standard interpretation, are construed as ranging over sets of possible worlds (propositions).

Special attention is paid to the most basic logic in this hierarchy, the pure "intelim logic", which satisfies all the requirements of a natural deduction system (allowing both introduction and ...

Boolean algebra, and other forms of abstract propositional logic, are based on dealing with compound propositions made up of simple propositions joined by logical connectors like "and", "or", and ...

Outline of topics Ever since modern symbolic logic was consolidated (in the mid 1900s), the standard format for an introductory logic class has been to learn the classical predicate calculus in three ...

IN the course of a review of Lewis Carroll's “Game of Logic” (p. 3), Mr. A. Sidgwick says incidentally that “In Mr. Venn's scheme propositions either tell us that a compartment is empty or ...