 Strict Conditionalization  If \(\Pr(\cdot)\) is your subjective probability at time \(t\), and if between \(t\) and \(t^\prime\) you become certain of \(A \in \mathbf{A}^{\Pr}\) and no logically stronger proposition, then your subjective probability at time \(t^\prime\) should be \(\Pr(\cdot \mid A)\). 