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