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: S_17(a_17) -> w. forall x_17: R_17(x_17) -> S_17(x_17). R_17(a_17). w -> R_17(a_17).
S_17(a_17) -> R_17(a_17) can be inferred via the transitivity rule. exists x: R_17(x) can be inferred via the existential generalization rule.