The STL (or Shit Tolerance Level) is the scientific unit of measure for variance in the inherent property of space to allow highly improbable occurrences. According to Neo-Quantum Platonic Theory multiple possibilities on the subatomic level do not resolve into a single choice until their effect has been observed. Following the discovery that the universe is self-observing, it became important to measure just how much highly improbable or unordinary occurrences — or shit — a given area of space would allow.