Consider the following premises. u_4. forall x_10: P_10(x_10) or Q_10(x_10). forall x_10: ~P_10(x_10) or R_10(x_10). Q_10(a_8) -> ~u_4. Can we infer ~R_10(a_8) from them?
 From forall x_10: P_10(x_10) or Q_10(x_10), forall x_10: ~P_10(x_10) or R_10(x_10) we can infer forall x_10: Q_10(x_10) or R_10(x_10). From forall x_10: Q_10(x_10) or R_10(x_10) we can infer Q_10(a_8) or R_10(a_8). From Q_10(a_8) -> ~u_4, u_4 we can infer ~Q_10(a_8). Finally, from Q_10(a_8) or R_10(a_8), ~Q_10(a_8) we can infer R_10(a_8), which contradicts ~R_10(a_8). Therefore, the answer is no.