Consider the following premises. ~Q_15(a). forall x_15: P_15(x_15) -> Q_15(x_15). P_15(a). forall x_15: Q_15(x_15) -> P_15(x_15). Can we infer t_2 from them? If possible, name the inference rules being used at each step.
We cannot infer that from the premises. Therefore the answer is no.