What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_18: P_18(x_18) -> U(x_18). exists x_18: P_11(x_18) -> T(x_18). forall x_18: P_18(x_18) or Q_4(x_18). forall x_18: U(x_18) -> P_18(x_18). forall x_18: Q_11(x_18) -> T(x_18). forall x_18: P_11(x_18) or Q_11(x_18). forall x_18: Q_4(x_18) -> U(x_18).
forall x_18: Q_4(x_18) -> P_18(x_18). forall x_18: U(x_18). exists x_18: T(x_18). forall x_18: P_18(x_18) <-> U(x_18). forall x_18: U(x_18) <-> P_18(x_18).