Consider the following premises. p_11 <-> w_2. S_7(a_7) -> p_11. forall x_7: R_7(x_7) <-> S_7(x_7). ~w_2. Can we infer R_7(a_7) from them?
 From p_11 <-> w_2, ~w_2 we can infer ~p_11. From forall x_7: R_7(x_7) <-> S_7(x_7) we can infer R_7(a_7) <-> S_7(a_7). From S_7(a_7) -> p_11, ~p_11 we can infer ~S_7(a_7). Finally, from R_7(a_7) <-> S_7(a_7), ~S_7(a_7) we can infer ~R_7(a_7), which contradicts R_7(a_7). Therefore, the answer is no.