The Essential John Dewey: 20+ Books in One Edition. Джон ДьюиЧитать онлайн книгу.
to us as subject, and the objective world of meanings as predicate. If we stop here, then knowledge turns out to be just what Bosanquet asserted at the outset that it was not, i. e., a relation between ideas. When we demand a justification for going farther than this, we find none except the claim of conscious thought that its nature is to know—a claim whose justice we have no possible means of testing, and which would not, even if admitted, be of the slightest value in deciding which particular judgment is true and which false.
Bosanquet's development of his subject has proved to be throughout the necessary logical outcome of the presuppositions with reference to reality from which he starts. The fundamental difficulty of erecting a theory of the knowledge-process upon such a basis is recognized by him at the start in a passage already quoted: "If the object-matter of reality lay genuinely outside the system of thought, not only our analysis, but thought itself, would be unable to lay hold of reality" (p. 2). But, in spite of this assertion, his fundamental conception of reality remains that of a system which does lie outside the thought-process. His theory is an attempt to reconcile the essentially irreconcilable views that reality is outside of the thought-process, and that it is inside of the thought-process, and he succeeds only by calling upon our faith that so it is.
If it be true, as it seems to him to be, that we are compelled to adhere to both of these views of reality, then surely there is no other outcome. It means, however, that we finally resign all hope of knowing reality. We may have faith in its existence, but we have no way of deciding what particular judgment has reality in it as it should have it, and what as it should not. All stand (and fall) on the same basis. But does not Bosanquet himself point out a pathway which, if followed farther, would reach a more satisfactory view of the realm of knowledge? He has shown us that the only sort of reality we know, or can know, is the reality which appears within our judgment-process—the reality as known to us. Would it not be possible to drop the presupposed reality outside of the judgment-process (with which judgment is endeavoring to make connections) and content ourselves with the sort of reality which appears within the judgment-process? In other words, may there not be a satisfactory view of reality which frankly recognizes its organic relation to the knowledge-process, without at the same time destroying its value as reality? Is it possible to admit that reality is in a sense constituted in the judgment without making it at the same time the figment of the individual imagination—"a game with ideas"?
Let us assume for the moment that the real difficulty with Mr. Bosanquet's conception, the error that keeps him traveling in his hopeless circles, is the notion that truth is a matter of reference of ideas as such to reality as such, leading us to oscillate between the alternatives that either all ideas have such reference, and so are true, constitute knowledge; or else none have such reference, and so are false; or else are mere ideas to which neither truth nor falsity can be attributed. Let us ask if truth is not rather some specific relation within experience, something which characterizes one idea rather than another, so that our problem is not how an idea can refer to a reality beyond itself, but what are the marks by which we discriminate a true reference from a false one. Then let us ask for the criterion used in daily life and in science by which to test reality.
If we ask the philosophically unsophisticated individual why he believes that his house still exists when he is away from it and has no immediate evidence of the fact, he will tell you it is because he has found that he can go back to it time and again and see it and walk into it. It never fails him when he acts upon the assumption that it is there. He would never tell you that he believed in its existence when he was not experiencing it because his mental picture of his house stood for and represented accurately an object in the real world which was nevertheless of a different order of existence from his mental picture. When you ask the physicist why he believes that the laws of motion are true, he will tell you that it is because he finds that bodies always do behave according to them. He can predict just what a body will do under given circumstances. He is never disappointed however long he takes it for granted that the laws of motion are true and that bodies behave according to them. The only thing that could make him question their truth would be to find some body which did not prove to behave in accordance with them. The criterion is the same in both cases. It is the practical criterion of what as a matter of fact will work. That which can safely be taken for granted as a basis for further action is regarded as real and true. It remains real so long, and only so long, as it continues to fulfil this condition. As soon as it ceases to do so, it ceases to be regarded as real. When a man finds that he can no longer obtain the accustomed experience of seeing and entering his house, he ceases to regard it as real. It has burned down, or been pulled down. When a physicist finds that a body does not, as a matter of fact, behave as a given law leads him to expect it would behave, he ceases to regard the law as true.
The contrast between the naïve view of the criterion of reality and the one we have just been discussing may be brought out by considering how we should have to interpret from each standpoint the constant succession of facts in the history of science which have ceased to be facts. For illustration take the former fact that the earth is flat. It ceased to be a fact, says the theory we have been reviewing, because further thought-constructions of the real world convinced us that there is no reality which the idea "flat-world" represents. The idea "round-world" alone reproduces reality. It ceased to be a fact, says the naïve view, because it ceased to be a safe guide for action. Men found they could sail around the world. Correspondence in one case is pictorial, and its existence or non-existence can, as we have seen, never be ascertained. In the other, correspondence is response, adjustment, the co-meeting of specific conditions in further constituting of experience.
In actual life, therefore, the criterion of reality which we use is a practical one. The test of reality does not consist in ascertaining the relationship between an idea and an x which is not idea, but in ascertaining what experience can be taken for granted as a safe basis for securing other experiences. The evident advantage of the latter view, leaving aside for the moment the question of its adequacy in other respects, is that it avoids the fundamental skepticism at once suggested by the former. How can we ever be sure that the fact which we have discovered will stand the test of further thought-constructions? Perhaps it comes no nearer to reality than the discarded one. Obviously we never can be sure that any particular content of thought represents reality so accurately and perfectly that it will never be subject to revision. If, however, the test of reality is the adequacy of a given content of consciousness as a stimulus to action, as a mode of control, we have an applicable standard. A given content of consciousness is real—is a fact—so long as the act resulting from it is adequate in adaptation to other contents. It ceases to be real as soon as the act it stimulates proves to be inadequate.
The view which places the ultimate test of facts, not in any relationship of contents or existences, but in the practical outcome of thought, is the one which seems to follow necessarily from a thoroughgoing conception of the judgment as a function—an act. Our fundamental biological conception of the activities of living organisms is that acts exist for the sake of their results. Acts are always stimulated by some definite set of conditions, and their value is always tested by the adequacy with which they meet this set of conditions. The judgment is no exception to the rule. It is always an act stimulated by some set of conditions which needs readjusting. Its outcome is a readjustment whose value is and can be tested only by its adequacy. It is accordingly entirely in line with our reigning biological conceptions to expect to find the ultimate criterion of truth and reality in the practical outcome of thought, and to seek for an understanding of the nature of the "real" and of the "ideal" within the total activity of judgment.
One difficulty besets us at the outset of such an investigation—that of being sure that we have a genuine judgment under examination. A large portion of the so-called judgments considered by logicians, even by those who emphasize the truth that a judgment is an act, are really not judgments at all, but contents of thought which are the outcome of judgments—what might be called dead judgments, instead of live judgments. When we analyze a real act of judgment, as it occurs in a living process of thought, we find given elements which are always present. There is always a certain situation which demands a reaction. The situation is always in part determined and taken for granted, and in part questioned. It is determined in so far as it is a definite situation of some sort; it is undetermined in so far as it furnishes