Consider the following premises. forall x_8: P_8(x_8) -> R_8(x_8). forall x_8: Q_8(x_8) -> R_8(x_8). forall x_8: P_8(x_8) or Q_8(x_8). forall x_8: R_8(x_8) -> U_4(x_8). Can we infer forall x_8: P_8(x_8) or Q_8(x_8) from them?
That is one of the premises. Therefore, the answer is yes.