> Are there any natural generative processes that produce/grow at a rate that isn't modellable by a linear combination of basic functions? Have we essentially d

> Are there any natural generative processes that produce/grow at a rate that isn't modellable by a linear combination of basic functions? Have we essentially discovered all the possible functions that describe how things grow or accumulate? Do more complicated functions sometimes describe changes in nature? Global weather patterns come to mind. E.g. how hurricanes, tornadoes, etc. form and change. As I understand it (and I'm no expert) there is some funky math involved in modelling those, and we're not really there yet. I'm not sure if those fall under "generative processes" though.