Consider the following premises. t_4 or R_17(c). t -> ~p_2. forall x_17: ~R_17(x_17). ~t_4 or p_2. Can we infer t from them?
 From forall x_17: ~R_17(x_17) we can infer ~R_17(c). From t_4 or R_17(c), ~t_4 or p_2 we can infer R_17(c) or p_2. From R_17(c) or p_2, ~R_17(c) we can infer p_2. Finally, from t -> ~p_2, p_2 we can infer ~t, which contradicts t. Therefore, the answer is no.