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: forall x_10: ~R_10(x_10). R_10(j) <-> q_4.
R_10(j) -> q_4 can be inferred via the biconditional elimination rule. q_4 -> R_10(j) can be inferred via the biconditional elimination rule.