What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: Q_12(x_12). P_12(i_4) <-> s. forall x_12: P_12(x_12) -> ~Q_12(x_12).
P_12(i_4) -> s. s -> P_12(i_4). forall x_12: ~P_12(x_12).