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: ~P_2(y). forall y: T(y) -> P_2(y). p <-> T(e). forall y: P_2(y) -> T(y).
p -> T(e) can be inferred via the biconditional elimination rule. T(e) -> p can be inferred via the biconditional elimination rule. forall y: ~T(y) can be inferred via the universal modus tollens rule. forall y: T(y) <-> P_2(y) can be inferred via the universal biconditional introduction rule. forall y: P_2(y) <-> T(y) can be inferred via the universal biconditional introduction rule.