Consider the following premises. forall x_13: P_13(x_13) -> W(x_13). forall x_13: W(x_13) <-> T(x_13). forall x_13: Q_13(x_13) -> W(x_13). exists x_13: P_13(x_13) or Q_13(x_13). Can we infer forall x_13: P_13(x_13) -> W(x_13) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.