Consider the following premises. exists x_8: Q_2(x_8). forall x_8: Q_6(x_8) -> U(x_8). forall x_8: U(x_8) or ~Q_8(x_8). forall x_8: Q_8(x_8) or Q_6(x_8). Can we infer exists x_8: U(x_8) from them?
 From forall x_8: U(x_8) or ~Q_8(x_8) we can infer forall x_8: Q_8(x_8) -> U(x_8). From forall x_8: Q_8(x_8) -> U(x_8), forall x_8: Q_6(x_8) -> U(x_8), forall x_8: Q_8(x_8) or Q_6(x_8) we can infer forall x_8: U(x_8). From forall x_8: U(x_8), exists x_8: Q_2(x_8) we can infer exists x_8: U(x_8) and Q_2(x_8). Finally, from exists x_8: U(x_8) and Q_2(x_8) we can infer exists x_8: U(x_8). Therefore, the answer is yes.