What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? forall y: U(y) <-> T(y). exists y: Q_3(y) -> W(y). forall y: W(y) -> Q_3(y). forall y: U(y) <-> W(y). forall y: ~T(y).
exists y: Q_3(y) <-> W(y). exists y: W(y) <-> Q_3(y). forall y: U(y) -> T(y). forall y: U(y) -> W(y). forall y: T(y) -> U(y). forall y: W(y) -> U(y). forall y: ~U(y).