An adequate general ontology should be able to address such recalcitrant entities as living, emotional and artistic ones. Not by chance, I have mentioned examples respectively pertaining to the material, the psychological and the social levels of reality. A general ontology intrinsically unable to address any of these subjects is unsuitable as a true general ontology. From the point of view of this book, it is worth noting that living, emotional and artistic entities include anticipatory moments. Anticipation is therefore (one of) the components missing from a true general ontology.