Very much so, particularly in his phenomenological analysis of space and time. Like Immanuel Kant (1724–1804), Heidegger thought that both space and time were “in” the subjects as necessary pre-conditions for experience. But unlike Kant, Heidegger did not believe that space and time were necessary categories in the mind; rather, they were ontological structures of human existence that became evident in the way Dasein concretely existed.