Placements within the metazoan crown-group have been rebutted, and it is most likely that these peculiar organisms lie in the stem group to the animals.
Unless the law is plainly arbitrary, suggesting examples of arbitrariness are not ordinarily helpful in rebutting this presumption of constitutionality.
Smith spends a considerable portion of the book rebutting the arguments of the mercantilists, though often these are simplified or exaggerated versions of mercantilist thought.