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_1(y) -> T(y). forall y: ~W_3(y). exists y: W_3(y) <-> T(y).
exists y: W_3(y) -> T(y) can be inferred via the existential biconditional elimination rule. exists y: T(y) -> W_3(y) can be inferred via the existential biconditional elimination rule. exists y: ~T(y) can be inferred via the existential biconditional elimination rule.