 Values, for Hartmann, are ideal entities. Mathematical entities and values “exist” in an atemporal way, and have their own determinations. In short, temporality is what radically distinguishes real categories from ideal categories, and apart from temporality, individuality is the second feature distinguishing real being from ideal being. Everything ideal is general, and everything real is individual. Everything real is unique and it exists only once. The general in reality is real only “in” individuals (A37e). Given the thesis that there are at least these two main types of ideal entities, what else is shared by the entities included in the sphere of ideal being? Hartmann considers the following three general features. 1) The overall geography of both mathematical entities and values is unknown. The constant efforts of the best minds and the accumulated experience of humankind have been able to explore some of their territories, and partially to map their landmarks. The overall shape of mathematics and the overall shape of the territory of values, however, are far from being charted. 2) Both the region of mathematical entities and the region of values extend beyond the boundaries of real being. Many mathematical structures are far from being exemplified in reality and some will never be. The same patently applies to values. 3) Both mathematics and ethics claim universality. This is part of their nature as ideal beings. On the other hand, neither mathematics nor ethics are able to capture—from their own point of view—the whole of reality. There is no single mathematical model of the world, and there are no good reasons to believe that there will ever be one. Similarly, there is no single ethical understanding of the whole of human experience, and there are no good reasons to believe that there will ever be one. This last issue is especially important from an ontological point of view, because it shows that the universality of both mathematics and ethics is different from the universality of ontology (Poli 2009a,b).