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 x: T(x) <-> U(x). T(j_2) -> w.
forall x: T(x) -> U(x) can be inferred via the universal biconditional elimination rule. forall x: U(x) -> T(x) can be inferred via the universal biconditional elimination rule.