ABSTRACT: The contemporary Spanish philosopher Xavier Zubiri (1893-1983) developed his philosophy in constant dialogue with the past. Zubiri believed that there are fundamental flaws with classical philosophy that require a fresh approach. His critique of classical philosophy falls into three areas: conceptual, factual, and scope. The first is treated in this paper with respect to five subjects. Zubiri believed that the structure of human intellection is incorrect in classical philosophy. This error contributes in large part to two key errors which he termed “entification of reality” and “logification of intellection.” Closely related are errors concerning essence and the relationship of truth and reality.