When we have mental models or "laws" (such as E = mc²) that work predictably and reliably, we perceive these models to be almost indistinguishable from the underlying reality. Based on the limited number of laws that we have been able to tease out in disciplines like physics, where testability and proof are easier, it is reasonable to assume that robust laws are hard to come by. And, it would be good to take the view that architecture is perhaps closer to art than it is to physics. So, great architectural models are really rare.