Consider the following premises. p_11 -> q_11. q_11 -> q_2. S_20(f) -> p_11. q_2 -> R_20(f). forall x_20: R_20(x_20) -> S_20(x_20). Can we infer q_11 -> q_2 from them?
That is one of the premises. Therefore, the answer is yes.