Ok, we all know what a level is, they are listed in order of discovery. A Sub-Level differs from a normal level because they are very similar to the parent level. Anomalous Levels differ from these two by their anomalous, mysterious properties. But how does a negative level differ from others? A negative level may be equal to a common level, a negative level may be equal to a sub-level, and a negative level may be an anomalous level.
So, if anyone knows, what is the difference between a negative level and the other three types of levels?