 Theorem. Suppose that \(s\in (\frac{1}{2}, \phi^{-1}]\). For all \(E\in{\bf A}^{\Pr}\), let \(\Bel_E = \{ A : \Pr(A|E) \geq s\}.\) Let \({\bf D}=\{E\in{\bf A}^{\Pr} : \Bel_E \text{ is deductively cogent} \}.\) Then \(\Bel_{{\bf D}}\) satisfies the six basic AGM postulates. 