Consider the following premises. ~w_4. R_17(a_17) -> w_4. forall x_17: R_17(x_17) -> S_17(x_17). S_17(a_17) -> R_17(a_17). Can we infer S_17(a_17) from them?
 From forall x_17: R_17(x_17) -> S_17(x_17) we can infer R_17(a_17) -> S_17(a_17). From S_17(a_17) -> R_17(a_17), R_17(a_17) -> S_17(a_17) we can infer S_17(a_17) <-> R_17(a_17). From R_17(a_17) -> w_4, ~w_4 we can infer ~R_17(a_17). From S_17(a_17) <-> R_17(a_17) we can infer S_17(a_17) -> R_17(a_17). Finally, from S_17(a_17) -> R_17(a_17), ~R_17(a_17) we can infer ~S_17(a_17), which contradicts S_17(a_17). Therefore, the answer is no.