 (P3) implies that any hypothesis is equally “confirmed” by empty evidence. We will say that \(C_{P}(h, e\mid k)\) represents the probabilistic relevance notion of confirmation, or relevance-confirmation, if and only if it satisfies (P0), (P1) and (P3). These conditions are sufficient to derive the following, purely qualitative principle, according to the definitional method in (QC) above (see Crupi and Tentori 2014, 82, and Crupi 2015).