The fundamental problem for us to understand and explain reality is that classification, and thereby also language, is fundamentally 3-dimensional. The problem with this fact is that all possible explanations include a dimensional reduction of at least one (ie, from the 4-dimensional reality). The problem with this is that we thereby either can’t portray the fourth dimension consistently (ie, that the explanation is ambiguous), in three dimensions, or that we confuse two dimensions (ie, that the explanation is paradoxically contradictory), in two dimensions. This problem thus opens for the fundamental split of humanity between what is called “nominalism” (the former) and “realism” (the latter).
This problem may be a problem only for speak, but may also be a problem for reality itself. Which is difficult to say. But, if it is a problem for reality itself, then so-called “black holes” is reality’s solution of it.