Practical Argumentation · Chapter 12Argument from Authority
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There is a particular kind of evidence frequently available for debaters and argumentative writers known as argument from authority. This evidence consists of the opinions and decisions of men who are recognized, to some extent at least, as authorities on the subjects of which they speak. An eminent scientist might explain with unquestioned certainty the operation of certain natural phenomena. A business man of wide experience and with well recognized insight into national conditions might speak authoritatively on the causes of business depressions. In religious matters the Bible is the highest authority for orthodox Christians; the Koran, for Mohammedans. In legal affairs the highest authorities are court decisions, opinions of eminent jurists, and the Constitution. If a certain college president is considered an authority in the matter of college discipline, then a quotation from him on the evils of hazing becomes valuable evidence for the affirmative of the proposition, "Hazing should be abolished in all colleges." If the arguer wishes to strengthen his evidence, he may do so by giving the president's reasons for condemning hazing; but he then departs from pure argument from authority. Pure argument from authority does not consist of a statement of the reasons involved; it asserts that something is true because some one who is acknowledged to be an authority on that subject says it is true.
Argument from authority differs from other evidence in that it involves not merely investigation but also the exercise of a high degree of judgment. The statement that in 1902, in the United Kingdom, two hundred and ninety-five communities of from 8,000 to 25,000 inhabitants were without street-car lines is not argument from authority; the discovery of this truth involved merely investigation. On the other hand, if some reputable statesman or business man should say that street-car facilities in the United States excelled those of England, this evidence would be argument from authority; only through both investigation and judgment could such a statement be evolved.
This kind of evidence is very strong when those addressed have confidence in the integrity, ability, and judgment of the person quoted. If, however, they do not know him, or if they do not consider him reliable, the evidence is of little value. Therefore, the test that an arguer should apply before using this kind of evidence is as follows:—
Is the witness an acknowledged authority on the subject about which he speaks?
Sometimes a short statement showing why the witness quoted is able to speak wisely and conclusively will render the evidence more valuable in the eyes of the audience. In the following example, notice how Judge James H. Blount used "authority" in proving that the Filipinos desired self-government:—
Senator Dubois, of Idaho, who was a member of the Congressional party that visited the Philippines, has since said in the New York "Independent": All the Filipinos, with the exception of those who were holding positions under and drawing salaries from our Government, favor a government of their own. There is scarcely an exception among them…. There is nobody in the islands, no organization of any kind or description, which favors the policy of our Government toward them.
Senator Newlands, of Nevada, also a member of the Congressional party aforesaid, has declared, in the number of this Review for December, 1905, that practically the whole people desire independence. Congressman Parsons, also a member of the same party, has since said: "There is no question that all the Filipino parties are now in favor of independence."
Captain J. A. Moss, of the Twenty-fourth Infantry, a member of General Corbin's staff, is quoted by Mr. Bryan, in the "Commoner" of April 27th, 1906, as saying in an article published in a Manila paper while Mr. Bryan was in the islands, with reference to the wishes of "the great majority" of Filipinos, that "to please them, we cannot get out of the islands too soon." [Footnote: North American Review, Vol. CLXXXIV, p. 136.]