Consider the following premises. forall x_6: R(x_6) -> U(x_6). exists x_6: P_2(x_6) or S_2(x_6). forall x_6: ~P_2(x_6) or R(x_6). forall x_6: S_2(x_6) <-> U(x_6). Can we infer forall x_6: R(x_6) -> U(x_6) from them?
That is one of the premises. Therefore, the answer is yes.