What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: w -> Q_3(c). q -> r_1. S_15(c) -> q. forall x_15: Q_3(x_15) -> S_15(x_15).
S_15(c) -> r_1 can be inferred via the transitivity rule.