Consider the following premises. forall x_10: ~R_10(x_10). s_2 -> q. q -> R_10(a_10). Can we infer s_2 from them?
 From forall x_10: ~R_10(x_10) we can infer ~R_10(a_10). From s_2 -> q, q -> R_10(a_10) we can infer s_2 -> R_10(a_10). Finally, from s_2 -> R_10(a_10), ~R_10(a_10) we can infer ~s_2, which contradicts s_2. Therefore, the answer is no.