truth cannot mean that it works for it cannot but work, having been constructed purely for that purpose. Its truth means that it corresponds to some actual existence at present unknown. To prove its truth the physicist does not appeal to its value as a hypothesis, but devises experiments by which, if it does exist, its existence will be demonstrated. In this actual case the experiments have had a uniformly negative result, and therefore the truth of the hypothesis is made doubtful or denied. The hypothesis continues to work as well as it ever did, and physicists will probably long continue to use it, but it has failed to establish its truth claim. The result is the modern Principle of Relativity, which, as we have already said, has produced a revolution in modern physics. The abolition of the æther would have been impossible if the physicist had been content with the utility of his hypothesis and had not experimented to prove its truth. The relation between truth and utility is thus proved to be that it is useful to know what is true. These two illustrations of scientific method--namely, the discovery of Neptune and the negative discovery {63} that the æther is non-existent--make it evident that verification is the intellectual process not of making true, but of finding true. We can, indeed, distinguish quite clearly the two processes. The first process, that of making true, is the constructing of the fiction by which we complete an incomplete system, and the second is the testing of that fiction to see if it corresponds to anything actually existing. No kind of intellectual activity will make an idea true, and conversely we may say that were truth only a utility, then knowledge instead of being systematic would be chaotic. Existence has its roots in reality, not in knowledge. Reality does not depend on truth. Truth is the intellectual apprehension of reality. If the pragmatist objects that in this argument I have throughout supposed him to be urging the narrow meaning of utility, namely, that it is usefulness in the strictly practical sense, whereas he intends it in the widest possible meaning--a meaning that includes theoretical usefulness--then the trouble is a different one; it is to know how and where the pragmatist stops short of the coherence theory of truth, and wherein his method differs from that of the idealist.