Consider the following premises. ~u. forall x_10: R_10(x_10) -> S_10(x_10). S_10(a_10) -> u. Can we infer R_10(a_10) from them?
 From forall x_10: R_10(x_10) -> S_10(x_10) we can infer R_10(a_10) -> S_10(a_10). From S_10(a_10) -> u, ~u we can infer ~S_10(a_10). Finally, from R_10(a_10) -> S_10(a_10), ~S_10(a_10) we can infer ~R_10(a_10), which contradicts R_10(a_10). Therefore, the answer is no.