Authorship Attribution

In the supervised setting, what you are trying to learn is a clust alberism with is learned perameters that could help you characterize writing style of a particular author. Different authors use punctuation differently, for exampleand so that's an easy way to figure out who wrote charles dickens because he usually puts a comma in between his noun and verb as fairly common back in those days. The use of punctuation to denote pauses is supposed to nowadays, it's lot more rule based.