Consider the following premises. forall x_14: Q_11(x_14). forall x_14: P_14(x_14) -> ~Q_11(x_14). forall x_14: P_14(x_14) -> Q_14(x_14). forall x_14: Q_14(x_14) -> P_14(x_14). Q_14(h) or t. Can we infer u 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.