What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: U_3(y) -> S(y). exists y: T_1(y) or ~S(y). forall y: T_1(y) -> U_3(y).
forall y: T_1(y) -> S(y). exists y: S(y) -> T_1(y).