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: exists y_3: T(y_3). forall y_3: T(y_3) -> T_2(y_3). forall y_3: U_1(y_3) and W_2(y_3).
exists y_3: T_2(y_3) can be inferred via the existential modus ponens rule. forall y_3: U_1(y_3) can be inferred via the universal simplification rule. forall y_3: W_2(y_3) can be inferred via the universal simplification rule.