Disclaimer: I have not read philosophy outside of limited Greek works
So, Plato theorized that there was a world of "universals" and "particulars", the world of general principles (mathematical and philosophical) which are not limited by time and space, and the specific, which is subject to changes and place. However, most ethical principles and ideals have been shown to be human constructs. The only true "forms" left behind seem to be mathematical truths and general logical principles (such as that of noncontradiction). These are less "objects" and more relationships, with no specific subject mentioned. This makes sense, as it would seem to me that any universal object would be indistinguishable from a relationship, as it would be universal across all time and space, so we would not have anything to compare it to; we would not be able to extract the "object" and see only the universal relations proceeding from it.
This seems to lead to a paradox. How can the "specific" exist when any universal objects said to justify it are indistinguishable from relations?