Sultanik’s Law of Wikipedia Authorship

$$\lim_{t \rightarrow \infty}P(a = \mbox{Expert} \vee a = \mbox{Troll}) = 1.0,$$

where $t$ is time and $a$ is the author of a new article on Wikipedia.

In other words, as time goes on it becomes more and more certain that authors of new Wikipedia articles will either be a very specialized expert or a troll.