 So, despite some pessimistic suggestions (see, e.g., Hawthorne 2018, and the discussion in Crupi and Tentori 2013), a neat confirmation-theoretic generalization of logical entailment (and refutation) is possible after all. Interestingly, relative distance measures can be additive, but only for uniform pairs of arguments – both confirmatory or both disconfirmatory (see Milne 2014, p. 259). (Note: Crupi, Tentori, and Gonzalez 2007; Crupi, Festa, and Buttasi 2010; and Crupi and Tentori 2013, 2014, provide further discussions of the properties of relative distance measures and their intuitive motivations. Also see Mura 2008 for a related analysis.)