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: exists x_12: P(x_12) or ~S_1(x_12). forall x_12: P(x_12) -> R_3(x_12). forall x_12: S_1(x_12).
exists x_12: S_1(x_12) -> P(x_12) can be inferred via the existential rewriting rule.