The cuil, denoted by the symbol ‽, is a unit of measurement used to denote levels of surreality attributed to anomaly. The cuil was coined by Purgatorian scientists in 3284, detailing how the laws of physics behave in a particular area. In realspace, where the Environmental Cuil Factor (ECF) is slightly above zero, reactions and forces behave in a manner that is considered normal to natives of our current reality. In Hyperspace, where the ECF is roughly 20‽, the same reactions under otherwise identical conditions will come to different conclusions. Different levels of cuils correspond to different sets of laws, which vary so wildly that an organism that evolved in an ECF of one can quickly perish in the other due to their delicate biochemistry no longer being able to function.
By their nature, cuils are a difficult thing to measure. Some people with access utilize a cuilometer.