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culed to deceive, and are, in general, inconsistent with a love of the truth, should be rejected.

(1.) IGNORATIO ELENCHI, or misapprehension of the question, is one instance of sophism. It exists when, from some misunderstanding of the terms and phrases that are employed, the arguments advanced do not truly apply to the point in debate. It was a doctrine, for instance, of some of the early philosophic teachers of Greece, that there is but one principle of things. Aristotle, under standing by the word principle what we commonly express by the word ELEMENT, attempted to show the contrary, viz., that the elements are not one, but many; thus incurring the imputation of IGNORATIO ELENCHI; for those who held the doctrine which was thus subjected to his animadversion, had reference, not to the forms, but the cause of things; not to any doctrine of elementary material particles, but to the intellectual origin, the creative mind, the Supreme Being, whom, as the PRINCIPLE, (that is, as the beginning and the support of things,) they maintained to be one." *

(2.) PETITIO PRINCIPII, or begging of the question, is another instance of sophism. This sophism is found whenever the disputant offers, in proof of a proposition, the proposition itself in other words. The following has been given as an instance of this fallacy in reasoning:A person attempts to prove that God is eternal, by maintaining that his existence is without beginning and without end. Here the proof which is offered, and the proposition itself which is to be proved, are essentially the same. When we are told that opium causes sleep, be. cause it has a soporific quality, or that grass grows by means of its vegetative power, the same thing is repeated in other terms.-This fallacy is very frequently practised; and a little care in detecting it would spoil many a fine saying, as well as deface many an elaborate argument. What is called arguing in a circle is a species of sophism very nearly related to the above. It consists in making two propositions reciprocally prove each other.

(3.) NON CAUSA PRO CAUSA, or the assignation of a false *La Logique ou L'art de Penser, (Port Royale,) part iii., chap. xix

cause. People are unwilling to be thought ignorant; rather than be thought so, they will impose on the credulity of their fellow-men, and sometimes on themselves, by assigning false causes of events. Nothing is more common than this sophism among illiterate people; pride is not diminished by deficiency of learning, and such people, therefore, must gratify it by assigning such causes of events as they find nearest at hand. Hence, when the appearance of a comet is followed by a famine or a war, they are disposed to consider it as the cause of those calamities. If a person have committed some flagrant crime, and shortly after suffer some heavy distress, it is no uncommon thing to hear the former assigned as the direct and the sole cause of the latter. This was the fallacy which historians have ascribed to the Indians of Paraguay, who supposed the baptismal ceremony to be the cause of death, because the Jesuit missionaries, whenever opportunity offered, administered it to dying infants, and to adults in the last stage of disease.

(4.) Another species of sophistry is called FALLACIA ACCIDENTIS.-We fall into this kind of false reasoning whenever we give an opinion concerning the general nature of a thing from some accidental circumstance. Thus, the Christian religion has been made the pretext for persecutions, and has, in consequence, been the source of much suffering; but it is a sophism to conclude that it is, on the whole, not a great good to the human race, because it has been attended with this perversion. Again, if a medicine have operated in a particular case unfavourably, or, in another case, have operated very favour. ably, the universal rejection or reception of it, in consequence of the favourable or unfavourable result in a particular instance, would be a hasty and fallacious induction of essentially the same sort. That is, the general nature of the thing is estimated from a circumstance which may be wholly accidental.

200. Fallacia equivocationis, or the use of equivocal terms and phrases (V.) It is a further direction of much practical impor tance, that the reasoner should be careful, in the use of language, to express everything with plainness and pre

cision; and, especially, never attempt to prejudice the cause of truth, and snatch a surreptitious victory by the use of an equivocal phraseology. No man of an enlarged and cultivated mind can be ignorant that multitudes of words in every language admit of diversities of signification. There are found also in all languages many words, which sometimes agree with each other, and sometimes differ in signification, according to the connexion in which they appear, and their particular application. There is, therefore, undoubtedly an opportunity, if any should be disposed to embrace it, of employing equivocal terms, equivocal phrases, and perplexed and mysterious combinations of speech, and thus hiding themselves from the penetrating light of truth, under cover of a mist of their own raising.

No man, whose sole object is truth and justice, will resort to such a discreditable subterfuge. If, in reasoning, he finds himself inadvertently employing words of an equivocal signification, it will be a first care with him to guard against the misapprehensions likely to result from that source. He will explain so precisely the sense in which he uses the doubtful terms, as to leave no probability of cavilling and mistake.

201. Of the sophism of estimating actions and character from the circumstance of success merely.

(VI.) The foregoing are some of the fallacies in reasoning which have found a place in writers of Logic. To these might be added the fallacy or sophism to which men are obviously so prone, of judging favourably of tnc characters and the deeds of others from the mere circumstance of success. Those actions which have a decidedly successful termination are almost always applauded, and are looked upon as the result of great intellectual forecast; while, not less frequently, actions that have an unsuccessful issue are not only stigmatized as evil in themselves, but as indicating in their projector a flighty and ill-balanced mind.-The fallacy, however, does not consist ir taking the issues or results into consideration, which are undoubtedly entitled to their due place in estimating the actions and characters of men, but in too much limiting our view of things, and forming a fa

vourable or unfavourable judgment from the mere circumstance of good or ill success alone.

While there is no SOPHISM more calculated to lead as tray and perplex, there is none more common than this; so much so, that it has almost passed into a proverb, that a hero must not only be brave, but fortunate. Hence it is that Alexander is called Great because he gained victories and overran kingdoms; while Charles XII. of Sweden, who the most nearly resembles him in the characteristics of bravery, perseverance, and chimerical ambition, but had his projects cut short at the fatal battle of Pultowa, is called a madman.

"Machiavel has justly animadverted," says Dr. Johnson, "on the different notice taken by all succeeding times of the two great projectors Catiline and Cæsar. Both formed the same project, and intended to raise themselves to power by subverting the commonwealth. They pursued their design, perhaps, with equal abilities and equal virtue; but Catiline perished in the field, and Cæsar returned from Pharsalia with unlimited authority; and from that time, every monarch of the earth has thought himself honoured by a comparison with Cæsar; and Catiline has never been mentioned but that his name might be applied to traitors and incendiaries."

§ 202. Of adherence to our opinions.

Whenever the rules laid down have been followed, and conclusions have been formed with a careful and candid regard to the evidence presented, those opinions are to be asserted and maintained with a due degree of confidence. It would evince an unjustifiable weakness to be driven from our honest convictions by the effrontery, or even by the upright though misguided zeal, of an opponent. Not that a person is to set himself up for infallible, and to suppose that new accessions of evidence are impossible, or that it is an impossibility for him to have new views of the evidence already examined. But a suitable degree of stability is necessary in order to be respected and useful; and, in the case supposed, such stability can be exhibited without incurring the charge, which is sometimes thrown Dut, of doggedness and intolerance.

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It is further to be observed, that we are not always to relinquish judgments which have been formed in the way pointed out, when objections are afterward raised which we cannot immediately answer. The person thus attack. ed can, with good reason, argue in this way: I have once examined the subject carefully and candidly; the evi dence, both in its particulars and in its multitude of bearings, has had its weight; many minute and evanescent circumstances were taken into view by the mind, which have now vanished from my recollection; I therefore dc not feel at liberty to alter an opinion thus formed, in consequence of an objection now brought up, which I am unable to answer, but choose to adhere to my present judgment, until the whole subject, including this objection, can be re-examined. This reasoning would in most cases be correct, and would be entirely consistent with that love of truth and openness to conviction which ought ever to be maintained.

§ 203. Effects on the mind of debating for victory instead of truth. By way of supporting the remarks under the first rule we here introduce the subject of contending for victory merely. He who contends with this object, takes every advantage of his opponent which can subserve his own purpose. For instance, he will demand a species of proof or a degree of proof which the subject in dispute does not admit; he gives, if possible, a false sense to the words and statements employed by the other side; he questions facts which he himself fully believes and everybody else, in the expectation that the opposite party is not furnished with direct and positive evidence of them. In a word, wherever an opening presents, he takes the utmost advan tage of his opponent, however much against his own in. ternal convictions of right and justice.

Such a course, to say nothing of its moral turpitude, effectually unsettles that part of our mental economy which concerns the grounds and laws of belief. The practice of inventing cunningly devised objections against arguments known to be sound, necessarily impairs the in fluence which such arguments ought to exert over us. Hence the remark has been made with justice, that per

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