What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? P(b) <-> q. forall x_15: ~P_15(x_15). forall x_15: Q_15(x_15) <-> P(x_15). forall x_15: P_15(x_15) or ~Q_15(x_15).
P(b) -> q. q -> P(b). forall x_15: Q_15(x_15) -> P_15(x_15). forall x_15: Q_15(x_15) -> P(x_15). forall x_15: P(x_15) -> Q_15(x_15).