Consider the following premises. T(a_12) <-> W(a_12). forall x_4: T(x_4) -> W(x_4). Can we infer T(a_12) -> W(a_12) from them? If possible, name the inference rules being used at each step.
We can infer T(a_12) -> W(a_12) via the universal instantiation rule. Therefore, the answer is yes.