St. John Henry Newman
Grammar of Assent
Part 2 › Chapter 8 · Part 3 of 9
Informal Inference
I will add, that, if we deal with arguments in the mere letter, the question of the authorship of works in any case has much difficulty. I have noticed it in the instance of Shakespeare, and of Newton. We are all certain that Johnson wrote the prose of Johnson, and Pope the poetry of Pope; but what is there but prescription, at least after contemporaries are dead, to connect together the author of the work and the owner of the name? Our lawyers prefer the examination of present witnesses to affidavits on paper; but the tradition of "testimonia," such as are prefixed to the classics and the Fathers, together with the absence of dissentient voices, is the adequate groundwork of our belief in the history of literature.
3. Once more: what are my grounds for thinking that I, in my own particular case, shall die? I am as certain of it in my own innermost mind, as I am that I now live; but what is the distinct evidence on which I allow myself to be certain? how would it tell in a court of justice? how should I fare under a cross-examination upon the grounds of my certitude? Demonstration of course I cannot have of a future event, unless by means of a Divine Voice; but what logical defence can I make for that undoubting, obstinate anticipation of it, of which I could not rid myself, if I tried?
First, the future cannot be proved à posteriori; therefore we are compelled by the nature of the case to put up with à priori arguments, that is, with antecedent probability, which is by itself no logical proof. Men tell me that there is a law of death, meaning by law a necessity; and I answer that they are throwing dust into my eyes, giving me words instead of things. What is a law but a generalized fact? and what power has the past over the future? and what power has the case of others over my own case? and how many deaths have I seen? how many ocular witnesses have imparted to me their experience of deaths, sufficient to establish what is called a law?
But let there be a law of death; so there is a law, we are told, that the planets, if let alone, would severally fall into the sun—it is the centrifugal law which hinders it, and so the centripetal law is never carried out. In like manner I am not under the law of death alone, I am under a thousand laws, if I am under one; and they thwart and counteract each other, and jointly determine the irregular line, along which my actual history runs, divergent from the special direction of any one of them. No law is carried out, except in cases where it acts freely: how do I know that the law of death will be allowed its free action in my particular case? We often are able to avert death by medical treatment: why should death have its effect, sooner or later, in every case conceivable?
It is true that the human frame, in all instances which come before me, first grows, and then declines, wastes, and decays, invisible preparation for dissolution. We see death seldom, but of this decline we are witnesses daily; still, it is a plain fact, that most men who die, die, not by any law of death, but by the law of disease; and some writers have questioned whether death is ever, strictly speaking, natural. Now, are diseases necessary? is there any law that every one, sooner or later, must fall under the power of disease? and what would happen on a large scale, were there no diseases? Is what we call the law of death anything more than the chance of disease? Is the prospect of my death, in its logical evidence,—as that evidence is brought home to me—much more than a high probability?
The strongest proof I have for my inevitable mortality is the reductio ad absurdum. Can I point to the man, in historic times, who has lived his two hundred years? What has become of past generations of men, unless it is true that they suffered dissolution? But this is a circuitous argument to warrant a conclusion to which in matter of fact I adhere so relentlessly. Anyhow, there is a considerable "surplusage," as Locke calls it, of belief over proof, when I determine that I individually must die. But what logic cannot do, my own living personal reasoning, my good sense, which is the healthy condition of such personal reasoning, but which cannot adequately express itself in words, does for me, and I am possessed with the most precise, absolute, masterful certitude of my dying some day or other.
I am led on by these reflections to make another remark. If it is difficult to explain how a man knows that he shall die, is it not more difficult for him to satisfy himself how he knows that he was born. His knowledge about himself does not rest on memory, nor on distinct testimony, nor on circumstantial evidence. Can he bring into one focus of proof the reasons which make him so sure? I am not speaking of scientific men, who have diverse channels of knowledge, but of an ordinary individual, as one of ourselves.
Answers doubtless may be given to some of these questions; but, on the whole, I think it is the fact that many of our most obstinate and most reasonable certitudes depend on proofs which are informal and personal, which baffle our powers of analysis, and cannot be brought under logical rule, because they cannot be submitted to logical statistics. If we must speak of Law, this recognition of a correlation between certitude and implicit proof seems to me a law of our minds.
2.
I said just now that an object of sense presents itself to our view as one whole, and not in its separate details: we take it in, recognize it, and discriminate it from other objects, all at once. Such too is the intellectual view we take of the momenta of proof for a concrete truth; we grasp the full tale of premisses and the conclusion, per modum unius,—by a sort of instinctive perception of the legitimate conclusion in and through the premisses, not by a formal juxtaposition of propositions; though of course such a juxtaposition is useful and natural, both to direct and to verify, just as in objects of sight our notice of bodily peculiarities, or the remarks of others may aid us in establishing a case of disputed identity. And, as this man or that will receive his own impression of one and the same person, and judge differently from others about his countenance, its expression, its moral significance, its physical contour and completion, so an intellectual question may strike two minds very differently, may awaken in them distinct associations, may be invested by them in contrary characteristics, and lead them to opposite conclusions;—and so, again, a body of proof, or a line of argument, may produce a distinct, nay, a dissimilar effect, as addressed to one or to the other.
Thus in concrete reasonings we are in great measure thrown back into that condition, from which logic proposed to rescue us. We judge for ourselves, by our own lights, and on our own principles; and our criterion of truth is not so much the manipulation of propositions, as the intellectual and moral character of the person maintaining them, and the ultimate silent effect of his arguments or conclusions upon our minds.
It is this distinction between ratiocination as the exercise of a living faculty in the individual intellect, and mere skill in argumentative science, which is the true interpretation of the prejudice which exists against logic in the popular mind, and of the animadversions which are levelled against it, as that its formulas make a pedant and a doctrinaire, that it never makes converts, that it leads to rationalism, that Englishmen are too practical to be logical, that an ounce of common-sense goes farther than many cartloads of logic, that Laputa is the land of logicians, and the like. Such maxims mean, when analyzed, that the processes of reasoning which legitimately lead to assent, to action, to certitude, are in fact too multiform, subtle, omnigenous, too implicit, to allow of being measured by rule, that they are after all personal,—verbal argumentation being useful only in subordination to a higher logic. It is this which was meant by the Judge who, when asked for his advice by a friend, on his being called to important duties which were new to him, bade him always lay down the law boldly, but never give his reasons, for his decision was likely to be right, but his reasons sure to be unsatisfactory. This is the point which I proceed to illustrate.
Source: Grammar of Assent (Newman Reader)