What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_3: Q_3(x_3) -> R_3(x_3). exists x_3: P(x_3) -> R_3(x_3). forall x_3: P_2(x_3) or P(x_3). forall x_3: ~P_2(x_3) or U_2(x_3). forall x_3: U_2(x_3) -> Q_3(x_3).
forall x_3: U_2(x_3) -> R_3(x_3). forall x_3: P(x_3) or U_2(x_3).