 Between the conservative and the reformatory, there is the middle way, due to Kolmogorov (1933). The idea is to think about the cases where the Ratio Formula applies, and then use them to “approximate” the cases where it does not apply. If this can be done, then although the Ratio Formula is not all there is to norms for conditional credences, it comes close. To be more precise, when we try to conditionalize on a zero-credence proposition \(B\), we can approximate \(B\) by a sequence of propositions \(B_1,\) \(B_2,\)… such that: