We are now in a position to define more precisely the nature of the conditions in which the sense of objectivity emerges, and this will bring us to the point at which the objective import of our economic and ethical judgments can profitably be discussed. We have said that the world of the physical is objective, not in virtue of the sensuous terms in which it is presented, but because it is a world of stimuli for the guidance of human conduct. Under what circumstances, then, are we conscious of stimuli in their capacity of guides or incentives or grounds of conduct? And the answer must be that stimuli are interpreted as such, and so take on the character of objectivity, when their precise character as stimuli is still in doubt, and they must therefore receive further definition. For example, a man pursued by a wild beast must find some means of escape or defense, and, seeing a tree which he may climb or a stone which he may hurl, will inspect these as well as may be with reference to their fitness for the intended purpose. It is at just such moments as these, then, that physical things become things for knowledge and take on their stubbornly objective character--that is to say, when they are essentially problematic. Now, in order that any physical thing may be thus problematic and so possess objective character for knowledge, it must (1) be in part understood, and so prompt certain more or less indiscriminate responses; and (2) be in part as yet not understood--in such wise that, while there are certain indefinite or unmeasured tendencies on the agent's part to respond to the object--climb the tree or hurl the stone--there is also a certain failure of complete unity in the co-ordination of these activities, a certain contradiction between different suggestions of conduct which different observed qualities of the tree or stone may give, and so hesitation and arrest of final action. The pursued man views the tree suspiciously before trusting himself to its doubtful strength, or weighs well the stone and tests its rough edges before pausing to throw it. Thus, to state the matter negatively, there are two possible situations in which the sense of objectivity, if it emerge into consciousness at all, cannot long continue. An object---as, for example, some strange shrub or flower--which, in the case we are supposing, may attract the pursued wayfarer's notice, may awaken no responses relevant to the emergency in which the agent finds himself; and it will therefore forthwith lapse from consciousness. Or, on the other hand, the object, as the tree or stone, may rightly or wrongly seem to the agent so completely satisfactory, or, rather, in effect may _be_ so, as instantly to prompt the action which otherwise would come, if at all, only after a period of more or less prolonged attention. In neither of these cases, then, is there a problematic object. In the one the thing in question is wholly apart from any present interest, and therefore lapses.