 On the reformatory approach, the Ratio Formula is no longer important and, instead, is derived as a mere consequence of something more fundamental. While the standard Bayesian view takes norms of unconditional credences to be fundamental and then uses the Ratio Formula as a bridge to conditional credences, the reformatory approach reverses the direction, taking norms of conditional credences as fundamental. Following Popper (1959) and Rényi (1970), this idea can be implemented with a version of Probabilism designed directly for conditional credences: