Consider the following premises. forall x_6: Q_6(x_6) -> W_4(x_6). forall x_6: W_4(x_6) <-> Q_6(x_6). Can we infer ~(Q_6(a_2) -> W_4(a_2)) from them? If possible, name the inference rules being used at each step.
That contradicts the premises. Therefore the answer is no.