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_3 <-> P_12(f). forall x_12: P_12(x_12) -> ~Q_12(x_12).
p_3 -> P_12(f). P_12(f) -> p_3. forall x_12: ~P_12(x_12).