At the core of Hegelian ontology are pure nothing and pure being, as well as the instant becoming between them, which were established through the quest for the beginning of philosophy in his famous book Science of Logic. However, for the past two centuries, that process of ontological construction by Hegel was not carefully examined by scholars all over the world. By delving into some details of Hegel’s discourse in his Science of Logic, this paper would identify one critical logical defect in the process of that construction, which would determine that the Hegelian logic would not be a rigorously self-consistent logic system without presupposition as Hegel claimed.
