Abstract
In many-valued propositional logic systems, Let Γ be a finite theory, there is a question that if Γ is a consistency theory in n1-valued logic, is it consistent in n2-valued logic? In this paper, we answer this question in following three prominent many-valued propositional logic systems.i.e. \L ukasiewicz many-valued propositional logic systems Ln, G\"{o}del many-valued propositional logic systems Gn, and the R0-type many-valued propositional logic systems(NM logic) L∗n. The result shows that in different logic systems the conclusion is different.