Writing is a skill or a craft. It cannot be learned by study alone. It is a bit like playing the piano and playing football. If we learn it at all, we learn it by practice and by trial and criticism. There are no fixed rules; at least I know of none that cannot be successfully violated. There are certain principles on which all writers agree. It is to these I shall turn in a moment...
The Technique of Writing Examinations,
San Diego L. Rev.
Available at: https://digital.sandiego.edu/sdlr/vol1/iss1/5