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_4(x_12). exists x_12: Q(x_12) or ~Q_4(x_12). forall x_12: R(x_12).
forall x_12: Q_4(x_12) and R(x_12). forall x_12: R(x_12) and Q_4(x_12). exists x_12: Q_4(x_12) -> Q(x_12).