Consider the following premises. forall x_7: P_7(x_7) or ~R(x_7). P_7(a_5) -> R(a_5). Can we infer forall x_7: P_7(x_7) or ~R(x_7) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.