this, in a theoretical point of view, we cannot form the smallest positive determinate concept. It cannot, therefore, in any way be explained how, according to it as principle, nature (in its particular laws) constitutes for us one system, which can be cognised as possible either by the principle of physical development or by that of final causes. If it happens that objects of nature present themselves which cannot be thought by us, as regards their possibility, according to the principle of mechanism (which always has a claim on a natural being), without relying on teleological propositions, we can only make an hypothesis. Namely, we suppose that we may hopefully investigate natural laws with reference to both (according as the possibility of its product is cognisable by our Understanding by one or the other principle), without stumbling at the apparent contradiction which comes into view between the principles by which they are judged. For at least the possibility is assured that both may be united objectively in one principle, since they concern phenomena that presuppose a supersensible ground. Mechanism, then, and the teleological (designed) Technic of nature, in respect of the same product and its possibility, may stand under a common supreme principle of nature in particular laws. But since this principle is _transcendent_ we cannot, because of the limitation of our Understanding, unite both principles _in the explanation_ of the same production of nature even if the inner possibility of this product is only _intelligible_ [verständlich] through a causality according to purposes (as is the case with organised matter). We revert then to the above fundamental proposition of Teleology. According to the constitution of the human Understanding, no other than designedly-working causes can be assumed for the possibility of organised beings in nature; and the mere mechanism of nature cannot be adequate to the explanation of these its products. But we do not attempt to decide anything by this fundamental proposition as to the possibility of such things themselves.