Consider the following premises. forall x_13: U(x_13) -> ~Q_8(x_13). forall x_13: U_4(x_13) -> P_13(x_13). exists x_13: Q_8(x_13). forall x_13: Q_13(x_13) -> U(x_13). forall x_13: P_13(x_13) -> Q_13(x_13). Can we infer exists x_13: Q_8(x_13) from them?
That is one of the premises. Therefore, the answer is yes.