What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall x_12: W_3(x_12) <-> U_2(x_12). forall x_12: W_3(x_12) <-> Q_8(x_12). forall x_12: U_2(x_12) -> W_3(x_12). exists x_12: ~Q_8(x_12).
forall x_12: W_3(x_12) -> U_2(x_12). forall x_12: W_3(x_12) -> Q_8(x_12). forall x_12: U_2(x_12) -> W_3(x_12). forall x_12: Q_8(x_12) -> W_3(x_12). exists x_12: ~W_3(x_12).