The Awful Truth: Reflections on the Situation in Chile.
Jennifer Haselberger, 04/01/2015, Canonical Consultation and Services
There is a field of study in mathematics known as chaos theory. Students of 'chaotic' environments, which include natural systems such as weather and climate, note that even deterministic systems can produce unpredictable outcomes as a result of small differences in initial conditions.
As a result, chaotic systems might appear predictable for a period of time, but then give way to uncertainty. Where meaningful predictions cannot be made, the system appears to be either random or 'chaotic'.