 Thus, using his well-known later terminology (from the Critique and the Prolegomena), Kant is here saying that, in the case of a real ground, the relationship between the concept of the consequent (e.g., an effect) and the concept of the ground (e.g., a cause) is not one of containment, and the judgment that the former follows from the latter is therefore not analytic. Moreover, although Kant does not explicitly refer to Hume in the essay on Negative Magnitudes, he proceeds to illustrate his problem with an example (among others) of the causal connection in the communication of motion by impact (2, 202; 240): 