Consider the following premises. forall x_13: Q_13(x_13) -> W_2(x_13). forall x_13: P_13(x_13) or Q_13(x_13). forall x_13: P_13(x_13) -> W_2(x_13). t. Can we infer t and W_2(e_4) from them?
 From forall x_13: P_13(x_13) -> W_2(x_13), forall x_13: Q_13(x_13) -> W_2(x_13), forall x_13: P_13(x_13) or Q_13(x_13) we can infer forall x_13: W_2(x_13). From forall x_13: W_2(x_13) we can infer W_2(e_4). Finally, from t, W_2(e_4) we can infer t and W_2(e_4). Therefore, the answer is yes.