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