Consider the following premises. s. forall x_10: ~P_10(x_10) or R(x_10). P(a_8) -> ~s. forall x_10: P_10(x_10) or P(x_10). 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.