What is one who writes a commentary or comments; an expositor; an annotator. The commentator's professed object is to explain, to enforce, to illustrate doctrines claimed as true. Whewell called?

commentator — One who writes a commentary or comments; an expositor; an annotator. The commentator's professed object is to explain, to enforce, to illustrate doctrines claimed as true. Whewell. (Webster's 1913.)

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