Consider the following premises. forall x_3: ~Q_3(x_3). forall x_3: U_2(x_3) or ~Q_3(x_3). forall x_3: U_2(x_3) -> Q_3(x_3). Can we infer forall x_3: U_2(x_3) or ~Q_3(x_3) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.