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) -> S_10(x_10). S_10(i_4) <-> q_3.
S_10(i_4) -> q_3 can be inferred via the biconditional elimination rule. q_3 -> S_10(i_4) can be inferred via the biconditional elimination rule.