Logical connectives are symbols or words linking propositions to form complex statements. They define relationships like 'and', 'or', 'not', and…
An intermediate logic derived from propositional logic by incorporating all instances of the weak excluded middle axiom. It is also…
A specialized field of logic focusing on the properties, composition, and inversion of relations, and their interplay with logical operators.…
Erotetic logic, also known as the logic of questions and answers, formalizes the study of interrogatives and their answers. It…
The logic of attributes extends first-order logic by incorporating attribute-value pairs. It's crucial for representing and reasoning about objects with…
A mechanical device designed to perform formal logic operations. Examples include the Stanhope Demonstrator and Jevon's logic piano, showcasing early…
A literal is a fundamental building block in propositional logic, representing either a basic proposition or its direct negation. It…
A formal framework for modal logic using possible worlds. Developed by Saul Kripke, it enables rigorous analysis of necessity, possibility,…
A classic logic puzzle setting where inhabitants are either truth-telling knights or lying knaves. These scenarios test deductive reasoning skills…
The "is" of identity refers to the verb "is" used to express numerical identity between two distinct entities. It asserts…