 (P1) is itself a comparative, or ordinal, principle, stating that, for any fixed hypothesis \(h\), the final (or posterior) probability and confirmation always move in the same direction in the light of data, \(e\) (given \(k\)). Interestingly, (P0) and (P1) are already sufficient to single out one traditional class of measures of probabilistic confirmation, if conjoined with the following (see Crupi and Tentori 2016, 656, Schippers 2017, and also Törnebohm 1966, 81):