Consider the following premises. forall z_4: W(z_4) -> ~T(z_4). exists z_4: T(z_4). Can we infer exists z_4: ~W(z_4) from them? If possible, name the inference rules being used at each step.
We can infer exists z_4: ~W(z_4) via the existential modus tollens rule. Therefore, the answer is yes.