Proof-Theoretic Validity
Proof-theoretic validity defines a valid proof within proof-theoretic semantics. It focuses on…
Proof-Theoretic Semantics
An alternative to truth-condition semantics, proof-theoretic semantics emphasizes the role of proof…
Proof-Theoretic Consequence
Proof-theoretic consequence, also known as syntactic consequence, explores logical entailment based on…
Permutation: Exchanging Formulas in Logic
Permutation is a structural rule in logic that enables the exchange of…
Negation Introduction Rule in Natural Deduction
Negation introduction is a natural deduction rule enabling the derivation of negation.…
Metatheory
Metatheory involves the theoretical analysis of mathematical and logical systems. It examines…
Mathematical Logic
Mathematical logic is the study of logic within mathematical reasoning. It explores…