Term logic, central to Aristotelian thought, analyzes propositions by focusing on the relationships between terms and the inferences derived from…
Subalternation describes how a universal statement's truth guarantees the truth of its corresponding particular statement. It's a fundamental concept in…
In syllogistic logic, a subaltern relationship means a universal proposition's truth implies a particular proposition's truth, but not the reverse.…
The obverse is a logical operation that negates a proposition's predicate and flips its quality (affirmative/negative) while preserving truth value.…
Normal modal logic is a foundational system in logic that incorporates rules like necessitation and distribution axioms. It enables the…
Negation elimination is a fundamental rule in natural deduction. It permits inferring a conclusion by negating a premise, provided it…
Natural deduction is a system of logical inference that aims to emulate human reasoning. It uses introduction and elimination rules…
Inferentialism posits that a statement's meaning arises from the rules governing its use and the logical inferences it permits. It…
Formal logic is the study of inference based solely on logical form, disregarding the interpretation of terms. It focuses on…
The Explosion Principle, also known as ex falso quodlibet, states that from a contradiction, any proposition can be logically derived.…