V. IGNORING THE QUESTION. (IGNORATIO ELENCHI.)
An arguer is said to ignore the question, or to argue beside the point, whenever he attempts to prove or disprove anything except the proposition under discussion. This fallacy may arise through carelessness or trickery. An unskilled debater will often unconsciously wander away from his subject; and an unscrupulous debater, when unable to defend his position, will sometimes cunningly shift his ground and argue upon a totally new proposition, which is, however, so similar to the original one that in the heat of controversy the change is hardly noticeable. A discussion on the subject, "The boycott is a legitimate means of securing concessions from employers," which attempted to show the effectiveness of the boycott, would ignore the question. Likewise, in a discussion on the proposition, "The average college student could do in three years the work now done in four," any proof showing the desirability of such a crowding together of college work would be beside the point.
In the following passage Macaulay holds up to scorn certain arguments which contain this fallacy:—
The advocates of Charles, like the advocates of other malefactors against whom overwhelming evidence is produced, generally decline all controversy about facts, and content themselves with calling testimony to character.
We charge him with having broken his coronation oath; and we are told that he kept his marriage vow! We accuse him of having given up his people to the merciless inflictions of the most hot-headed and hard- hearted of prelates; and the defence is, that he took his little son on his knees and kissed him! We censure him for having violated the articles of the Petition of Rights, after having, for good and valuable consideration, promised to obey them; and we are informed that he was accustomed to hear prayers at six o'clock in the morning!
Whenever an arguer avoids the question at issue and makes an attack upon the character, principles, or former beliefs or personal peculiarities of his opponent, he commits the special form of this fallacy known as argumentum ad hominem. It is obviously fallacious to reason that a principle is unsound because it is upheld by an untrustworthy advocate, or because it is inconsistent with the advocate's former beliefs and practices. Honesty is a worthy principle, even though advocated by a thief. The duty of industry is no less binding because it is advocated by an idler. Lawyers often commit this error by seeking to discredit the opposing attorney. Campaign speakers frequently attempt to overthrow the opposing party's platform by showing that it is inconsistent with the party's previous measures and declarations. To bring in such irrelevant matter is to ignore the question.
Closely allied to argumentum ad hominem is another phase of ignoring the question called argumentum ad populum. This fallacy consists of using before a certain audience statements which will strongly appeal to their prejudices and partisan views, but which are not generally accepted facts and which would undoubtedly meet with strong opposition elsewhere. A speaker who brings in this kind of argument makes use neither of reasoning nor of legitimate persuasion. He neglects his proposition and attempts to excite the feelings of his audience to such an extent as to render them incapable of forming a dispassionate judgment upon the matter in hand.
In general, it is necessary only to point out a fallacy to weaken an argument. Sometimes, however, the error is so involved and so hidden that, though it is apparent to one who is arguing, yet it is not easily made apparent to the audience. In overcoming this difficulty, arguers often resort to certain peculiar devices of arranging and presenting the material for refutation. Long experience has shown that the two methods given here are of inestimable value.
VI. REDUCTIO AD ABSURDUM. (REDUCING TO AN ABSURDITY.)
The method of refuting an argument by reductio ad absurdum consists of showing that the argument to be refuted, if true, proves not only the conclusion given, but also other conclusions which are manifestly absurd. For example, a debater once contended that colleges should not seek to root out professionalism in athletic sports, because, by coming in contact with college life, professional players receive considerable benefit. His opponent answered him by showing that the same argument carried out to its logical conclusion would prove that a college should encourage the attendance of criminals and degenerates on the ground that they will be benefited thereby. Thus he reduced the argument to a manifest absurdity.