Expository Writing

by Mervin James Curl

The Two Main Classes of Definitions

Two main classes of definition exist: first, the rigidly logical, scientific kind such as is found in dictionaries, textbooks, and other such writings which are not concerned with emotional values; and second, the less rigid, more expanded, more informal kind which aims to please as well as to instruct, and which is found in essays and all forms of writing with a strong human appeal. The two kinds are alike in the presence of both genus and differentia; they differ chiefly in the presence, in the less formal, of the qualities of pleasingness and stimulation as opposed to the quality, in the formal, of scientific impersonality, cold intellectuality. For example, the Standard Dictionary defines a correspondent as "one who communicates by means of letters; specifically one who sends regular communications from a distant place to a newspaper or a business house." The author of the volume entitled Famous War Correspondents[14] defines, with much the same fundamental ideas, if not indeed exactly the same, a war correspondent as follows:

The war correspondent is a newspaper man assigned to cover a campaign. He goes into the field with the army, expecting to send his reports from that witching region known as "the front." He is a special correspondent commissioned to collect intelligence and transmit it from the camp and the battle ground. A non-combatant, he mingles freely with men whose business it is to fight. He may be ten thousand miles from the home office, but he finds competition as keen as ever it is in Fleet Street or Newspaper Row. He is engaged in the most dramatic department of a profession whose infinite variety is equalled only by its fascination. If he becomes a professional rather than an occasional correspondent, wandering will be his business and adventure his daily fare. Mr. A. G. Hales is of the opinion that the newspaper man who is chosen as a war correspondent has won the Victoria Cross of journalism.

For the making of a first-rate war correspondent there are required all the qualifications of a capable reporter in any other branch of the profession, and others besides. Perhaps it is true that the regular hack work of the ordinary newspaper man is the best training for the scribe of war. The men who had reported fires and train wrecks in American cities proved themselves able to describe vigorously and clearly the campaign in Cuba. William Howard Russell had been doing a great variety of descriptive writing before he was sent to the Crimea. The prime requisites for a satisfactory war correspondent are those fundamental to success in any kind of newspaper work, the ability to see straight, to write vividly and accurately, and to get a story on the wire.

Occasionally a brilliant workman appears from nowhere, the happy possessor of an almost uncanny intuition of movements and purposes. Such a man was Archibald Forbes. But Forbes, no less than the average special, had to have the physical capacity to march with the private soldier, to ride a hundred miles at a clip at top speed over rough country, to sleep in the open, to stand the heat of the desert and the cold of the mountain height, to endure hunger and thirst and all the deprivations of a hard campaign. Every correspondent at times must keep going until his strength is utterly spent. He must have the tenacity which does not yield to exhaustion until his messages are written and on the way to his paper. When the soldier ceases fighting, the correspondent's work is only begun. He needs also to have a degree of familiarity with the affairs of the present and the history of the past which will secure him the respect of the officers with whom he may associate. Along with the courage of the scout he should possess the suavity and tact of the diplomat, for he will have to get along with men of all types, and occasionally, indeed, his own influence may overlap into the field of international diplomacy. British correspondents, having covered many wars, small and great, since 1870, usually are acquainted with several languages, and often have acquired a knowledge of the technicalities of military science.

Of the two kinds of definition—formal and informal—you will more often have occasion to write the second. You must guard against the danger, in such writing, of allowing the interest to cloud the truth, of being led into inaccurate partial statements by your desire to please. At the root of every good definition is still the accurate statement of genus and differentia. It is chiefly of the second kind that we shall treat here. If you can write a definition that is pleasing and stimulating and also accurate, you can always boil it down into the more bald formal statement such as the dictionary offers. Whatever powers of grace or neatness in expression you possess, whatever powers of saying things in a pleasing manner, it is your privilege to employ in the writing of definitions.

General Cautions

For the sake of clearness and general effectiveness a few cautions need to be made. In the first place, be sure to exclude everything from your definition that does not properly belong in it. For example, if you define the aeroplane as a machine that journeys through the air under its own power, you include dirigible balloons, which are not aeroplanes. You must introduce both the characteristics of being heavier than air and of having a plane or planes before your definition can stand. You will make this exclusion by choosing both class and differentia with the greatest care.