A proposition is a declarative sentence that is either true or false, but not both. 命题是一个陈述语句，它或真或假，但不能既真又假。 (True when exactly one of p and q is true.) Note: ∨ vs. ⊕ ...

Proposition: A declarative statement that is either true or false Truth Value: Indicates whether the proposition is actually true or false. The truth value can be true, false, unknown, or a matter of ...

Abstract: We present the logic K/2 which is a logic with classical implication and only the left part of classical negation. We show that it is possible to define a classical negation into K/2 and ...