Consider the following premises. q_2 -> s_1. R_13(a_13) <-> q_2. forall x_13: R_13(x_13) or S_13(x_13). ~s_1. Can we infer R_13(a_13) <-> q_2 from them? If possible, name the inference rules being used at each step.
That is one of the premises. Therefore, the answer is yes.