Hypothesis

“ The question still remains, what is there which exists in the hypothesis believed, and does not exist in the hypothesis rejected, when we have associations which enable our imagination to represent the facts agreeably to either hypothesis? In other words, what is Belief? ”

“ But if the universal character of the hypothesis and the tested theory belong to the instrumental character of thought in so reconstructing a world that has proved to be imperfect, and inadequate to conduct, the stuff of the world and of the new hypothesis are the same. ”

“ But when the hypothesis, of itself and without adjustment for the purpose, gives us the rule and reason of a class of facts not contemplated in its construction, we have a criterion of its reality, which has never yet been produced in favour of falsehood. ”

“ Whatever may be the merits of the opinion as a physical hypothesis, with which we do not here meddle, can it for a moment prevent our looking beyond the hypothesis, to a First Cause, an Intelligent Author, an origin proceeding from free volition, not from material necessity? ”

“ I stated to you in substance, if not in words, that wherever there are complex masses of phenomena to be inquired into, whether they be phenomena of the affairs of daily life, or whether they belong to the more abstruse and difficult problems laid before the philosopher, our course of proceeding in unravelling that complex chain of phenomena with a view to get at its cause, is always the same; in all cases we must invent an hypothesis; we must place before ourselves some more or less likely supposition respecting that cause ”

“ To this we reply, that our inquiry must be, whether the Facts have the same relation in the Hypothesis which they have in reality;—whether the results of our suppositions agree with the phenomena which nature presents to us. For this purpose, we must both carefully observe the phenomena, and steadily trace the consequences of our assumptions, till we can 68 bring the two into comparison. The Conceptions which our hypotheses involve, being derived from certain Fundamental Ideas, afford a basis of rigorous reasoning, as we have shown in the Books of the History of those Ideas. ”

“ Such persons will perceive that what I mean by the rationality of a belief in any hypothesis is its fitness to be accepted and acted upon because it has in its favor the strongest probabilities of the case, so far as we can grasp those probabilities. I know of no other foundation for a belief in anything; for belief is the acceptance by the mind of some proposition, statement, or supposed fact, the truth of which depends upon evidence addressed to our senses, or to our intellectual perceptions, or to both. ”

“ It will be seen, after giving the matter a little thought, that the actual formation of the hypothesis is more than a mere grouping together or synthesis of facts or ideas—there is another mental process which actually evolves the hypothesis or theory—which gives a possible reason. ”

“ In the current language of the physicists, an hypothesis of this importance is called a theory, while the term hypothesis is restricted to suggestions which have little evidence in their favor. There is some justice in the contempt which clings to the word hypothesis. To think that we can strike out of our own minds a true preconception of how Nature acts, in a vain fancy. ”

“ It appears, then, to be a condition of a genuinely scientific hypothesis, that it be not destined always to remain an hypothesis, but be of such a nature as to be either proved or disproved by comparison with observed facts. ”

“ The reaction of one hypothesis upon another leads to a fuller and sharper recognition of the scope of each. Every added hypothesis is quite sure to call forth into clear recognition neglected aspects of the phenomena. ”

“ But the foundation of our inductive processes is the thought that, since the real world is a perfectly rational and united body of truth, that hypothesis which reduces to relatively rational unity the greatest number of facts is more apt to represent the truth of things than any hypothesis of less scope, and of less rational significance. ”

“ Such a résumé of results shows plainly that we cannot help the progress of science by blocking the path of theory and looking only at its positive aspects, that is to say, at the collection of facts that it explains. The value of a theory lies rather in the hypothesis which it can suggest, by means of the psychological representation of the symbols. ”

“ But it does prove that the theory has a better chance of being true than any of its present competitors, and it suggests that what can be known with certainty is likely to be discoverable by taking our theory as a starting-point, and gradually freeing it from all such assumptions as seem irrelevant, unnecessary, or unfounded. On these grounds, I recommend it to attention as a hypothesis and a basis for further work, though not as itself a finished or adequate solution of the problem with which it deals. ”

“ That the supporters of the hypothesis themselves are conscious of the difficulty, is shown by their unanimous assertion that the psychical and physical series are ultimately manifestations of one and the same reality. ”

“ System of Nature, vol. i. ↑ That which can do any thing. ↑ The burthen of proof. ↑ I do not invent hypothesis; for whatever is not deduced from phœnomena, is to be called an hypothesis; and hypotheses, either metaphysical or physical, or grounded on occult qualities, should not be allowed any room in philosophy. ↑ To tell what he is, you must be himself. ”

“ We must, in the first place, be prepared to prove that the supposed causes of the phenomena exist in nature; that they are what the logicians call 'vera causae'—true causes;—in the next place, we should be prepared to show that the assumed causes of the phenomena are competent to produce such phenomena as those which we wish to explain by them; and in the last place, we ought to be able to show that no other known causes are competent to produce those phenomena. If we can succeed in satisfying these three conditions we shall have demonstrated our hypothesis ”

“ The psycho-physiological hypothesis is both inductively and deductively the sine qua non of the science of psychology. ”

“ It matters not to an empiricist from what quarter an hypothesis may come to him: he may have acquired it by fair means or by foul; passion may have whispered or accident suggested it; but if the total drift of thinking continues to confirm it, that is what he means by its being true. ”

“ But what we call objective reality is, in the last analysis, what is common to many thinking beings, and could be common to all; this common part, we shall see, can only be the harmony expressed by mathematical laws. It is this harmony then which is the sole objective reality, the only truth we can attain; and when I add that the universal harmony of the world is the source of all beauty, it will be understood what price we should attach to the slow and difficult progress which little by little enables us to know it better. ”

“ So far we have looked at our intellectual endowment from the standpoint of ordinary common-sense experience. Let us now consider the philosophical theory based on this view, which explains the nature of knowledge by showing its purpose. The intellect not only selects, but in selecting transforms the reality. It presents us with knowledge that indeed corresponds with reality, for it is essentially a view of reality, but also in selecting it marks out divisions, and gives to reality a form that is determined by practical interest. ”

“ Without dwelling upon a subject, the discussion of which does not enter into the design of the present work, I may remark that the question whether an à priori proof of the existence of a First Cause be possible, is a question concerning the nature of our Ideas, and the evidence of the axioms which they involve, of the same kind as many questions which we have already had to discuss. Is our Conception or Idea of a First Cause gathered from the effects we see around us? ”

“ Our systems of science, our conclusions in philosophy, our intuitions into first truths and laws, and all the confidence with which we accept truth in all these great realms of mental life, rest back on the observations, reasonings and conclusions for whose reality and order consciousness is our most fundamental voucher. To its tests and verifications all the processes of knowing must submit. No truth is even visible except in the light in which consciousness holds all our acts and forms of intelligence. ”

“ All such conceptions can be viewed either as relatively valid, or as metaphysically final, only upon the basis to be established by a general theory of what constitutes our own type of knowledge. And for such a theory, — our whole present concern, — experience and reality alike contain only fulfilment of purpose, complete or incomplete, conditions of interest and attention, expressed or partially expressed in present consciousness, — acknowledgments of facts, and ignorance of facts, — beliefs, and truths related to beliefs. ”

“ All minds [he tells us] [43] with any instincts of science in their composition have grown to distrust, on merely antecedent grounds, any explanation which embodies a miraculous element. Such minds have grown to regard{30} all these explanations as mere expressions of our own ignorance of natural causation; or, in other words, they have come to regard it as an à priori truth that nature is always uniform in respect of method or causation; that the reign of law is universal; the principle of continuity ubiquitous. ”

“ Of the science, therefore, which expounds the operations of the human understanding in the pursuit of truth, one essential part is the inquiry: What are the facts which are the objects of intuition or consciousness, and what are those which we merely infer? But this inquiry has never been considered a portion of logic. ”

“ OF THE FIRST STAGE OF INDUCTION.—THE DISCOVERY OF PROXIMATE CAUSES, AND LAWS OF THE LOWEST DEGREE OF GENERALITY, AND THEIR VERIFICATION.
(137.) The first thing that a philosophic mind considers, when any new phenomenon presents itself, is its explanation, or reference to an immediate producing cause. If that cannot be ascertained, the next is to generalize the phenomenon, and include it, with others analogous to it, in the expression of some law, in the hope that its consideration, in a more advanced state of knowledge, may lead to the discovery of an adequate proximate cause. ”

“ Every assertion concerning Things, whether in concrete or in abstract language, is an assertion that some fact, or group of facts, has been, is, or may be expected to be, found, wherever a certain other fact, or group of facts, is found. Belief in this, is therefore either remembrance that we did have, or expectation that we shall have, or a belief of the same nature with expectation that in 418 some given circumstances we should have, or should have had, direct perception of a particular fact. ”

“ Where then is the necessity for assuming that our recognition of these truths has a different origin from the rest of our knowledge, when its existence is perfectly accounted for by supposing its origin to be the same? when the causes which produce belief in all other instances, exist in this instance, and in a degree of strength as much superior to what exists in other cases, as the intensity of the belief itself is superior? ”

“ The conclusions of theory can not be trusted, unless confirmed by observation; nor those of observation, unless they can be affiliated to theory, by deducing them from the laws of human nature, and from a close analysis of the circumstances of the particular situation. ”

“ First, that even if your knowledge and its object are facts which when examined, say by a psychologist, appear to him to be causally connected, or which, when externally observed, seem to agree, still any such linkage, where it exists, is no part of the essential nature, i.e. of the mere definition, either of your object in so far as it is real, or of your knowledge in so far as it consists of mere ideas. If your knowledge is true, is sound, is valid, it is indeed such as somehow to agree with the object. ”

“ Now since this, it appears, cannot be done, by rejecting the Ideas which all Facts involve, in what manner are we to conform to the obvious maxim, that the Facts which form the basis of Science must be perfectly definite and certain?
The analysis of facts into Ideas and Sensations, which we have so often referred to, suggests the answer to this inquiry. We are not able, nor need we endeavour, to exclude Ideas from our Facts; but we may be able to discern, with perfect distinctness, the Ideas which we include. ”

“ Where our consciousness recognizes between two phenomena an inherent distinction; where we are sensible of a difference which is not merely of degree, and feel that no adding one of the phenomena to itself would produce the other; any theory which attempts to bring either under the laws of the other must be false; though a theory which merely treats the one as a cause or condition of the other, may possibly be true. ”

“ Upon the basis of the general theory of human knowledge thus broadly sketched, we shall next pass to a study of the questions offered to our scrutiny by Nature, when viewed in its relation to Man. Here our main purpose shall be to apply our general idealistic doctrine, concerning what is meant by Reality in general, to the problem as to the sense in which Nature and Man are real. ”

“ First, I was long before fixed in a deep, rational conviction of the shortness of human knowledge, and that there was no truth which we receive, whether upon the evidence of metaphysical, mathematical, or moral principles, or even on the evidence of our senses, against which there lay not insoluble objections. ”

“ As mere conceptions, the effect-theory and the cause-theory of attention are equally clear; and whoever affirms either conception to be true must do so on metaphysical or universal rather than on scientific or particular grounds. ”