a Bedeutung Relation Princip Supposition Princip guarantees its correctness, and the principle a of such a systematic unity is also objective but in an indeterminate way (principium vagum): not as a constitutive principle' for determining something in regard to its di rect object, but rather as a merely regulative principle and maxim for furthering and strengthening the empirical use of reason by opening up new paths into the infinite (the undetermined) with which the understanding is not acquainted, yet without ever being the least bit contrary to the laws of its empirical use.