 Routley (1978), see also Sylvan 1989 (2000, chapter 5), suggested a conception of connexive logic different from McCall’s. If the requirement of a connection between antecedent and succedent of a valid implication is understood as a content connection, and if a content connection obtains if antecedent and succedent are relevant to each other, then “the general classes of connexive and relevant logics are one and the same” (Routley 1978, p. 393), cf. also Sarenac and Jennings 2003, where the connection between McCall’s connexive system CC1, presented in section 4.1, and relevance preservation is studied.