Consider the following premises. forall y: R(y) -> W_4(y). exists y: ~W_1(y). forall y: W_4(y) -> R(y). forall y: W_1(y) <-> R(y). Can we infer forall y: W_4(y) from them?
 From forall y: W_1(y) <-> R(y), exists y: ~W_1(y) we can infer exists y: ~R(y). From forall y: W_4(y) -> R(y), forall y: R(y) -> W_4(y) we can infer forall y: W_4(y) <-> R(y). Finally, from forall y: W_4(y) <-> R(y), exists y: ~R(y) we can infer exists y: ~W_4(y), which contradicts forall y: W_4(y). Therefore, the answer is no.