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: S_1(y) -> T_1(y). forall y: T_1(y) -> P(y). forall y: P(y) -> T_1(y). forall y: P(y).
forall y: T_1(y) can be inferred via the universal modus ponens rule. forall y: S_1(y) -> P(y) can be inferred via the universal transitivity rule. forall y: T_1(y) <-> P(y) can be inferred via the universal biconditional introduction rule. forall y: P(y) <-> T_1(y) can be inferred via the universal biconditional introduction rule.