Weak Negation in Logic
Weak negation, found in non-classical logics, asserts the absence of truth for…
Weak Completeness in Logic
Weak completeness states that if a statement is semantically valid (true in…
Upward Löwenheim–Skolem Theorem
The upward Löwenheim–Skolem theorem states that if a first-order theory has an…
The Truth-Teller Paradox
The truth-teller is a self-referential statement asserting its own truth, contrasting with…
Tautology: Understanding Logically True Statements
A tautology is a statement or formula that is always true, regardless…
Syntactic Consequence in Formal Systems
Syntactic consequence defines the relationship between premises and conclusions derived through logical…
Strong Paraconsistency: Embracing Contradictions
Strong paraconsistency posits that contradictions can be genuinely true in some possible…