What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_15: ~Q_15(x_15). p_3 <-> P_15(b). forall x_15: P_15(x_15) -> Q_15(x_15).
p_3 -> P_15(b). P_15(b) -> p_3. forall x_15: ~P_15(x_15).