Consider the following premises. P_17(a_15) -> p. forall x_17: P_17(x_17) or ~Q_17(x_17). u_4 or Q_17(a_15). u_4 <-> p. Can we infer p_4 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.