Formal Logic

Recent Posts For Formal Logic

Ternary Semantics in Logic

Ternary semantics extend possible worlds semantics using a ternary relation, often in…

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Strong Completeness in Logic

Strong completeness in logic means that if a formula is true in…

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Rule of Replacement in Formal Logic

A fundamental principle in formal logic that permits substituting logically equivalent expressions…

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Pure Predicate Logic

Pure predicate logic, also known as pure first-order logic, is a formal…

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Post Consistency in Formal Theories

A theory is Post consistent if it contains at least one unprovable…

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Polyadic First-Order Logic

An extension of first-order logic that incorporates predicates with multiple arguments. This…

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Open Formula in Formal Languages

An open formula in a formal language is an expression with unbound…

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Objectual Quantifiers in Formal Logic

Objectual quantifiers are a type of quantifier in formal logic that specifically…

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Monadic Relation: Understanding Unary Relations

A monadic relation, also known as a unary relation, describes a property…

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Henkin Semantics

Henkin semantics offers a flexible alternative to standard first-order semantics, allowing quantifiers…

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