None of the Above
Q. Is it safe to assume that the Chicago Manual of Style itself is written in Chicago style? Sometimes I can’t find a specific answer, but the word or phrase itself is actually used somewhere therein.
A. Yes, you can assume that the Manual is written in Chicago style. Be aware, however, that the figures may depart from Chicago style in some details, since they are taken from actual manuscripts and published books or journals. Often during editing, a given detail of house style may be tweaked or even ignored to honor common practice in that writer’s discipline. For that reason, each figure should be regarded as an illustration of the point being made in that section, rather than as exemplifying Chicago style in every detail.