Consider the following premises. forall x_11: R_11(x_11) or S_11(x_11). S_11(a_11) -> p_15. p_15 <-> w_2. ~R_11(a_11) or q. ~w_2. Can we infer ~r 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.