Consider the following premises. exists x: T_3(x) -> W_3(x). forall x: W_3(x) -> T_3(x). forall x: T_3(x) <-> W_3(x). Can we infer exists x: T_3(x) -> W_3(x) from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.