 When this way of argumentation was dropped, the ability to understand the results were lost as well.Thus Russo conjectures that the definitions of elementary geometric objects were introduced in Euclid's "Elements" by Heron of Alexandria, 400 years after the work was completed.More concretely, Russo shows how the theory of tides must have been well-developed in Antiquity, because several pre-Newtonian sources relay various complementary parts of the theory without grasping their import or justification (getting the empirical facts wrong but the theory right).