Consider the following premises. forall x_6: ~P_2(x_6). forall x_6: Q_2(x_6) or ~T_4(x_6). forall x_6: P_2(x_6) or T_4(x_6). Can we infer forall x_6: P_2(x_6) or T_4(x_6) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.