Consider the following premises. forall y_2: W(y_2) or P_3(y_2). forall y_2: P_3(y_2) -> U_4(y_2). forall y_2: W(y_2) -> U_4(y_2). Can we infer forall y_2: P_3(y_2) -> U_4(y_2) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.