What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? S_17(b) -> q_3. p_4 <-> q_3. forall x_17: R_17(x_17) or S_17(x_17). R_17(b) -> q_3.
p_4 -> q_3. q_3 -> p_4.