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_17: P(x_17) -> S_17(x_17). S_17(b_1) <-> q_10. q_10 -> P(b_1).
S_17(b_1) -> q_10 can be inferred via the biconditional elimination rule. q_10 -> S_17(b_1) can be inferred via the biconditional elimination rule.