 The conditional of most mainstream relevant systems is taken as representing implication or (necessary) entailment, not a ceteris paribus or counterfactual conditional. But some of the first theories of counterpossible conditionals, addressing the limitations of the Lewis/Stalnaker account of counterfactuals, were developed against a relevance logic background: see Routley (1989); Mares and Fuhrmann (1995), and Mares (1997).