51. The Body of the Argument. In the main body of the argument the difference from the brief will be largely a matter of expansion: the brief indicates the evidence, the argument states it at length. Here again you cut your argument to fit your audience and the space at your command. In an argument in the editorial of a newspaper, which is rarely longer than a long college theme, there is little space for the statement of evidence. In Webster's argument in the White Murder Case, which has some thirteen thousand words and which must have taken two hours or more to deliver, the facts are studied in minute detail. Most people are surprised to see the way in which a full statement of evidence eats up space; if the facts are at all complicated, they must be analyzed and expounded one by one and their bearing on the case laid out in full. This necessity of using space in order to make facts clear is the reason why it is so hard to find adequate and convincing arguments which will print in less than fifteen or twenty pages. The trouble with a swift and compact argument like that of Macaulay's on the authorship of the Junius Letters (see p. 155) is that unless you have gone into the question for yourself, you do not know whether to accept the stated facts or not. If you do accept them, the conclusion is inevitable; but if you happen to know that scholars have long held the decision doubtful, you want to know more about the facts in detail before surrendering to Macaulay's conclusion. For an average reader to-day, who knows little of the facts, this argument would have to be greatly expanded.

In this expansion comes the chance for all the skill in exposition that you can muster, and for that subtle appeal to your readers' feelings which lies in vividness and precision of phrasing, considerations with which I will deal separately further on. Questions of proportion of space we may consider here.

The only rule that can be laid down for the distribution of your space is to use your sagacity, and all your knowledge of your subject and of your audience. In a written argument you have the advantage that you can let your pen run on your first draft, and then go back and weigh the comparative force of the different parts of the argument, and cut out and cut down until your best points for the purpose have the most space. In a debate the same end is gained by rehearsals of the main speeches; in the rebuttal, which is best when it is spontaneous, you have to trust to the judgment gained by practice.

Other things being equal, however, brevity carries an audience. If you can sum up your case in half the time that it takes the other side to state theirs, the chances are that your audience will think you have the right of it. Above all, beware of boring your readers by too exhaustive explanation of details or of aspects of the case which they care nothing about. I suppose there is no one of us who has not a worthy friend or two who will talk through a whole evening on whether a lawn should be watered in the evening or the early morning, or whether the eighth hole on the golf course should not be fifty yards longer. One must not be like the man who in the discussion of bimetallism a few years ago used to keep his wife awake at night expounding to her the iniquities and inequalities of a single standard. It is safer to underestimate than to overestimate the endurance and patience of your audience.

52. The Refutation. The place of the refutation will, as we have seen in the chapter on planning (see p. 82), vary greatly with the argument and with the audience. Its purpose is to put out of the way as effectively as possible the main points urged by the other side. In an argument of fact this is done both by exposing weak places in the reasoning and by throwing doubt on the facts cited, either through proof that they are contradicted by better evidence, or that the evidence brought forward to establish them is shaky or inconclusive. In an argument of policy the points on the other side are met either by throwing doubt on the facts on which they rest, or by showing that the points themselves have not coercive force.

Where there are really strong points on the other side, in either kind of argument, it is often sound policy to admit their strength. This is especially true in arguments of policy where the advantages are closely balanced. If you are trying to convince a boy that he should go to your college rather than to another, you do not gain anything by telling him that the other college is no good; if he is worth gaining over he will know better than that. And in general if you have given a man to understand that there is nothing to be said for the other side, and he afterwards finds that there are strong grounds for it, your argument will have a fall in his estimation.

In the manner of your refutation lean towards the side of soberness and courtesy. It has been said that the poorest use you can put a man to is to refute him; and it is certain that in the give and take of argument in active life the personal victories and defeats are what are soonest forgotten. If after a while you have to establish a fact in history or in biology, or to get a verdict from a jury or a favorable report from the committee of a legislature, you will think a good deal more about the arguments of your opponents than about them personally. There are few arguments in which you can afford to take no notice of the strong points of the other side; and where the burden of proof is strongly with you, your own argument may be almost wholly refutation; but it is always worth bearing in mind that if it is worth while for you to be arguing at all, there is something, and something of serious weight, to be said on the other side.

53. The Conclusion. The conclusion of your argument should be short and pointed. Gather the main issues together, and restate them in terms that will be easy to remember. Mere repetition of the points as you made them in your introduction may sound too much like lack of resource; on the other hand, it helps to make your points familiar, and to drive them home. In any event make your contentions easy to remember. Most of us go a long way towards settling our own minds on a puzzling question when we repeat to some one else arguments that we have read or heard. If you can so sum up your argument that your readers will go off and unconsciously retail your points to their neighbors, you probably have them. On the other hand, when you have finished your argument, if you start in to hedge and modify and go back to points that have not had enough emphasis before, you throw away all you have gained. In arguing nothing succeeds like decision and certainty of utterance. Even dogmatism is better than an appearance of wabbling. It is the men like Macaulay, who see everything black and white with no shades between, who are the leaders of the world's opinion. Sum up, then, wherever it is decent to do so, as if there were only one side of the case, and that could be stated in three lines.

54. The Power of Convincing. The convincing power of an argument depends on its appeal to the reason of its readers. To put the same fact in another way, an argument has convincing power when it can fit the facts which it deals with smoothly and intelligently into the rest of the reader's experience. If an argument on a complicated mass of facts, such as the evidence in a long murder case, makes the reader say, "Yes, now I see how it all happened," or an argument for the direct election of United States senators makes him say, "Yes, that is a plain working out of the fundamental principles of popular government," then he is convinced. In this aspect argument merges into exposition. It is significant that, as has already been noted, Matthew Arnold's argument that Wordsworth is the greatest English poet after Shakespeare and Milton, and Huxley's argument that the physical basis of animal and plant life is the same, are both used in a book of examples of exposition.[58][!--Note--] The essential difference between argument and exposition from this point of view lies in the emphasis: normally an explanation covers the whole case evenly; an argument throws certain parts and aspects of the case into relief.

If, therefore, to be convincing, your argument must provide a reasonable explanation of the whole state of affairs to which the case belongs, you can use all the devices there are for clear and effective explanation. I will therefore briefly review a few of these.