Consider the following premises. forall y: U_2(y) -> ~Q_2(y). forall y: S_3(y) -> U_2(y). S_3(c) or u. forall y: Q_2(y). forall y: U_2(y) -> S_3(y). Can we infer w_3 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.