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). exists y: T(y) or ~W(y). forall y: P_1(y).
forall y: W(y) and P_1(y). forall y: P_1(y) and W(y). exists y: W(y) -> T(y).