Explore: Formal Logic

Logic is the study of correct reasoning. It includes both formal and informal logic. Formal logic is the study of deductively valid inferences or logical

Mathematical logic is a branch of metamathematics that studies formal logic within mathematics. Major subareas include model theory, proof theory, set

equality used in first order logic. The two main types of deductive systems are proof systems and formal semantics. Formal proofs are sequences of well-formed

In logic and philosophy, a formal fallacy is a pattern of reasoning with a flaw in its logical structure (the logical relationship between the premises

Classical logic Computability logic Deontic logic Dependence logic Description logic Deviant logic Doxastic logic Epistemic logic First-order logic Formal logic

The history of logic deals with the study of the development of the science of valid inference (logic). Formal logics developed in ancient times in India

First-order logic, also called predicate logic, predicate calculus, or quantificational logic, is a collection of formal systems used in mathematics, philosophy

ways of deriving conclusions from premises. They are integral parts of formal logic, serving as norms of the logical structure of valid arguments. If an

In logic, mathematics, computer science, and linguistics, a formal language is a set of strings whose symbols are taken from a set called "alphabet".

foundation of first-order logic and higher-order logic. Propositional logic is typically studied with a formal language, in which propositions are represented