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). p <-> q_4. R_10(d) <-> q_4.
p -> q_4 can be inferred via the biconditional elimination rule. R_10(d) -> q_4 can be inferred via the biconditional elimination rule. q_4 -> p can be inferred via the biconditional elimination rule. q_4 -> R_10(d) can be inferred via the biconditional elimination rule.