 Ahead of this recent wave of work, Rott (1986) pioneered another measure of relevance in a belief revision framework, a measure picked up by Spohn (2013), and proposed independently in various accounts of causality. Arguing against Conjunctive Sufficiency (see  sections 2.2),  Rott’ suggests that a “difference-making” conditional \(A&gt;C\) is accepted provided \(C\in K*A\) and \(C\notin K*\neg A\). This is a relevantized variant of the Ramsey Test, ruling that the conditional is accepted provided the revision by \(A\) results in the belief that \(C\), but the revision by \(\neg A\) does not result in the belief that \(C\). Using the terminology of “difference-making conditionals”, Rott (forthcoming) calls the violation of RW the hallmark of conditionals that encode the idea that the antecedent is positively relevant to the consequent. This yields a logic that also invalidates CMon, Cut, Or and Contraposition, but it validates And, Aristotle’s theses, a restricted form of Abelard’s thesis as well as conditions such as