Explore: Natural Logic

In logic and proof theory, natural deduction is a kind of proof calculus in which logical reasoning is expressed by inference rules closely related to

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

Informal logic is associated with informal fallacies, critical thinking, and argumentation theory. Informal logic examines arguments expressed in natural language

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

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

Interlingua Society, 1990. ter Meulen, Alice, 2001, "Logic and Natural Language", in Goble, Lou, ed., The Blackwell Guide to Philosophical Logic. Blackwell.

Propositional logic is a branch of logic. It is also called statement logic, sentential calculus, propositional calculus, sentential logic, or sometimes

principle of bivalence is studied in philosophical logic to address the question of which natural-language statements have a well-defined truth value

In logic, the semantics of logic or formal semantics is the study of the meaning and interpretation of formal languages, formal systems, and (idealizations

term natural language formalization is often used. An example is the translation of the English sentence "some men are bald" into first-order logic as ∃