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: R_12(j_4) <-> S_12(j_4). ~R_12(j_4). forall x_12: R_12(x_12) -> S_12(x_12).
R_12(j_4) -> S_12(j_4) can be inferred via the biconditional elimination rule. S_12(j_4) -> R_12(j_4) can be inferred via the biconditional elimination rule.