My aim here is to unpack the regulatory takings problem in a way that suggests why it is intractable. The idea is to reveal some of the different types of ambiguity necessarily entailed in takings cases. Seeing these ambiguities, we readily can understand why the doctrine in this area is so confused and confusing; why there is, in short, a "takings puzzle." To my mind, it is much more difficult to understand why anyone would expect matters to be otherwise. This oddity I call the "takings-puzzle puzzle."
Krier, James E. "The Takings-Puzzle Puzzle." Wm. & Mary L. Rev. 38, no. 3 (1997): 1143-50.