De Morgan Duality Explained
De Morgan duality reveals the relationship between AND and OR logical operators.…
Degree-Theoretic Semantics
Degree-theoretic semantics measures sentence truth in degrees, moving beyond binary true/false. This…
Deflationism
Deflationism posits that 'true' has no substantive property. Its role is primarily…
Deductively Equivalent Theories
Two theories are deductively equivalent if they can prove the exact same…
Deductive Consequence
Deductive consequence, also known as syntactic consequence, refers to the relationship where…
Deductive Reasoning Explained
Deduction is a logical process moving from general premises to a specific,…
Decision Procedure
A decision procedure is a systematic algorithm that determines if statements are…
Cut Elimination
A fundamental procedure in proof theory that systematically removes 'cuts' from a…
Cut in Proof Theory
A cut rule in proof theory introduces an intermediate conclusion within a…