The first distinguishing characteristic of thinking then is facing the facts—inquiry, minute and extensive scrutinizing, observation. Nothing has done greater harm to the successful conduct of the enterprise of thinking (and to the logics which reflect and formulate the undertaking) than the habit of treating observation as something outside of and prior to thinking, and thinking as something which can go on in the head without including observation of new facts as part of itself. Every approximation to such "thinking" is really an approach to the method of escape and self-delusion just referred to. It substitutes an emotionally agreeable and rationally self-consistent train of meanings for inquiry into the features of the situation which cause the trouble. It leads to that type of Idealism which has well been termed intellectual somnambulism. It creates a class of "thinkers" who are remote from practice and hence from testing their thought by application—a socially superior and irresponsible class. This is the condition causing the tragic division of theory and practice, and leading to an unreasonable exaltation of theory on one side and an unreasonable contempt for it on the other. It confirms current practice in its hard brutalities and dead routines just because it has transferred thinking and theory to a separate and nobler region. Thus has the idealist conspired with the materialist to keep actual life impoverished and inequitable.

The isolation of thinking from confrontation with facts encourages that kind of observation which merely accumulates brute facts, which occupies itself laboriously with mere details, but never inquires into their meaning and consequences—a safe occupation, for it never contemplates any use to be made of the observed facts in determining a plan for changing the situation. Thinking which is a method of reconstructing experience treats observation of facts, on the other hand, as the indispensable step of defining the problem, of locating the trouble, of forcing home a definite, instead of a merely vague emotional, sense of what the difficulty is and where it lies. It is not aimless, random, miscellaneous, but purposeful, specific and limited by the character of the trouble undergone. The purpose is so to clarify the disturbed and confused situation that reasonable ways of dealing with it may be suggested. When the scientific man appears to observe aimlessly, it is merely that he is so in love with problems as sources and guides of inquiry, that he is striving to turn up a problem where none appears on the surface: he is, as we say, hunting for trouble because of the satisfaction to be had in coping with it.

Specific and wide observation of concrete fact always, then, corresponds not only with a sense of a problem or difficulty, but with some vague sense of the meaning of the difficulty, that is, of what it imports or signifies in subsequent experience. It is a kind of anticipation or prediction of what is coming. We speak, very truly, of impending trouble, and in observing the signs of what the trouble is, we are at the same time expecting, forecasting—in short, framing an idea, becoming aware of meaning. When the trouble is not only impending but completely actual and present, we are overwhelmed. We do not think, but give way to depression. The kind of trouble that occasions thinking is that which is incomplete and developing, and where what is found, already in existence can be employed as a sign from which to infer what is likely to come. When we intelligently observe, we are, as we say apprehensive, as well as apprehending. We are on the alert for something still to come. Curiosity, inquiry, investigation, are directed quite as truly into what is going to happen next as into what has happened. An intelligent interest in the latter is an interest in getting evidence, indications, symptoms for inferring the former. Observation is diagnosis and diagnosis implies an interest in anticipation and preparation. It makes ready in advance an attitude of response so that we shall not be caught unawares.

That which is not already in existence, that which is only anticipated and inferred, cannot be observed. It does not have the status of fact, of something given, a datum, but of a meaning, an idea. So far as ideas are not fancies, framed by emotionalized memory for escape and refuge, they are precisely anticipations of something still to come aroused by looking into the facts of a developing situation. The blacksmith watches his iron, its color and texture, to get evidence of what it is getting ready to pass into; the physician observes his patient to detect symptoms of change in some definite direction; the scientific man keeps his attention upon his laboratory material to get a clue as to what will happen under certain conditions. The very fact that observation is not an end in itself but a search for evidence and signs shows that along with observation goes inference, anticipatory forecast—in short an idea, thought or conception.

In a more technical context, it would be worth while to see what light this logical correspondence of observed fact and projected idea or meaning throws upon certain traditional philosophical problems and puzzles, including that of subject and predicate in judgment, object and subject in knowledge, "real" and "ideal" generally. But at this time, we must confine ourselves to pointing out that this view of the correlative origin and function of observed fact and projected idea in experience, commits us to some very important consequences concerning the nature of ideas, meanings, conceptions, or whatever word may be employed to denote the specifically mental function. Because they are suggestions of something that may happen or eventuate, they are (as we saw in the case of ideals generally) platforms of response to what is going on. The man who detects that the cause of his difficulty is an automobile bearing down upon him is not guaranteed safety; he may have made his observation-forecast too late. But if his anticipation-perception comes in season, he has the basis for doing something which will avert threatening disaster. Because he foresees an impending result, he may do something that will lead to the situation eventuating in some other way. All intelligent thinking means an increment of freedom in action—an emancipation from chance and fatality. "Thought" represents the suggestion of a way of response that is different from that which would have been followed if intelligent observation had not effected an inference as to the future.

Now a method of action, a mode of response, intended to produce a certain result—that is, to enable the blacksmith to give a certain form to his hot iron, the physician to treat the patient so as to facilitate recovery, the scientific experimenter to draw a conclusion which will apply to other cases,—is by the nature of the case tentative, uncertain till tested by its results. The significance of this fact for the theory of truth will be discussed below. Here it is enough to note that notions, theories, systems, no matter how elaborate and self-consistent they are, must be regarded as hypotheses. They are to be accepted as bases of actions which test them, not as finalities. To perceive this fact is to abolish rigid dogmas from the world. It is to recognize that conceptions, theories and systems of thought are always open to development through use. It is to enforce the lesson that we must be on the lookout quite as much for indications to alter them as for opportunities to assert them. They are tools. As in the case of all tools, their value resides not in themselves but in their capacity to work shown in the consequences of their use.

Nevertheless, inquiry is free only when the interest in knowing is so developed that thinking carries with it something worth while for itself, something having its own esthetic and moral interest. Just because knowing is not self-enclosed and final but is instrumental to reconstruction of situations, there is always danger that it will be subordinated to maintaining some preconceived purpose or prejudice. Then reflection ceases to be complete; it falls short. Being precommitted to arriving at some special result, it is not sincere. It is one thing to say that all knowing has an end beyond itself, and another thing, a thing of a contrary kind, to say that an act of knowing has a particular end which it is bound, in advance, to reach. Much less is it true that the instrumental nature of thinking means that it exists for the sake of attaining some private, one-sided advantage upon which one has set one's heart. Any limitation whatever of the end means limitation in the thinking process itself. It signifies that it does not attain its full growth and movement, but is cramped, impeded, interfered with. The only situation in which knowing is fully stimulated is one in which the end is developed in the process of inquiry and testing.

Disinterested and impartial inquiry is then far from meaning that knowing is self-enclosed and irresponsible. It means that there is no particular end set up in advance so as to shut in the activities of observation, forming of ideas, and application. Inquiry is emancipated. It is encouraged to attend to every fact that is relevant to defining the problem or need, and to follow up every suggestion that promises a clue. The barriers to free inquiry are so many and so solid that mankind is to be congratulated that the very act of investigation is capable of itself becoming a delightful and absorbing pursuit, capable of enlisting on its side man's sporting instincts.

Just in the degree in which thought ceases to be held down to ends fixed by social custom, a social division of labor grows up. Investigation has become a dominant life occupation for some persons. Only superficially, however, does this confirm the idea that theory and knowledge are ends in themselves. They are, relatively speaking, ends in themselves for some persons. But these persons represent a social division of labor; and their specialization can be trusted only when such persons are in unobstructed co-operation with other social occupations, sensitive to others' problems and transmitting results to them for wider application in action. When this social relationship of persons particularly engaged in carrying on the enterprise of knowing is forgotten and the class becomes isolated, inquiry loses stimulus and purpose. It degenerates into sterile specialization, a kind of intellectual busy work carried on by socially absent-minded men. Details are heaped up in the name of science, and abstruse dialectical developments of systems occur. Then the occupation is "rationalized" under the lofty name of devotion to truth for its own sake. But when the path of true science is retaken these things are brushed aside and forgotten. They turn out to have been the toyings of vain and irresponsible men. The only guarantee of impartial, disinterested inquiry is the social sensitiveness of the inquirer to the needs and problems of those with whom he is associated.