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_3(y) -> T_2(y). forall y: T_2(y) -> W(y). exists y: ~W(y). forall y: W(y) -> T_2(y).
exists y: ~T_2(y) can be inferred via the existential modus tollens rule. forall y: Q_3(y) -> W(y) can be inferred via the universal transitivity rule. forall y: T_2(y) <-> W(y) can be inferred via the universal biconditional introduction rule. forall y: W(y) <-> T_2(y) can be inferred via the universal biconditional introduction rule.