Consider the following premises. forall x_16: P_16(x_16) <-> Q_16(x_16). S(b) -> s_4. forall x_16: Q_16(x_16) -> S(x_16). forall x_16: U(x_16) -> P_16(x_16). Can we infer ~(U(b) -> s_4) from them? If possible, name the inference rules being used at each step.
That contradicts the premises. Therefore the answer is no.