What can be inferred from the following premises in a single inference step (ignoring inferences that add new predicates or constants)? Name the inference rule being used: forall y: Q(y) -> R(y). forall y: ~W(y). forall y: R(y) -> W(y). exists y: W(y) -> Q(y).
forall y: ~R(y) can be inferred via the universal modus tollens rule. forall y: Q(y) -> W(y) can be inferred via the universal transitivity rule. exists y: W(y) -> R(y) can be inferred via the existential transitivity rule. exists y: R(y) -> Q(y) can be inferred via the existential transitivity rule.