What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: W(y) or U_4(y). forall y: U_4(y) -> T(y). forall y: W_1(y) -> T(y). exists y: ~W(y) or W_1(y). forall y: Q(y).
exists y: U_4(y) or W_1(y).