 In order to bring out the particular difficulties of the argument from design, and the way in which it has only the façade of ordinary experimental reasoning, Hume suggests the analogy of a house. When we see a house we naturally and reasonably conclude (i.e., with moral certainty) that “it had an architect or builder; because this is precisely that species of effect, which we have experienced to proceed from that species of cause” (D, 2.8/144). When we consider the universe, however, things are very different. In this case, we have experience of a unique effect: the universe. Moreover, our experience of this effect is limited to a small part or a “narrow corner” of it — from which we must make conjectures about the whole. Beyond this, we have no experience at all of its cause. Clearly, then, in a case of this kind we have no experience of “two species of objects” that are constantly conjoined on the basis of which we may draw some (reliable) inference (EU, 11.30/148; D, 2.24/149–50).