Consider the following premises. forall x_7: ~R_7(x_7). R_7(a_7) -> q. q -> R_7(a_7). Can we infer ~q from them?
 From forall x_7: ~R_7(x_7) we can infer ~R_7(a_7). From R_7(a_7) -> q, q -> R_7(a_7) we can infer R_7(a_7) <-> q. Finally, from R_7(a_7) <-> q, ~R_7(a_7) we can infer ~q. Therefore, the answer is yes.