[34] But it would be better to use the term "logically-practical" instead of "subjective" with the psychical implications of that term. [35] An analysis which has been many times carried out has made it clear that scientific data never do more than approximate the laws and entities upon which our science rests. It is equally evident that the forms of these laws and entities themselves shift in the reconstructions of incessant research, or where they seem most secure could consistently be changed, or at least could be fundamentally different were our psychological structure or even our conventions of thought different. I need only refer to the _Science et Hypothese_ of Poincare and the _Problems of Science_ of Enriques. The positivist who undertakes to carry the structure of the world back to the data of observation, and the uniformities appearing in the accepted hypotheses of growing sciences cannot maintain that we ever succeed in isolating data which must remain the same in the kaleidoscope of our research science; nor are we better served if we retreat to the ultimate elements of points and instants which our pure mathematics assumes and implicitly defines, and in connection with which it has worked out the modern theory of the number and continuous series, its statements of continuity and infinity. [36] In other words, science assumes that every error is _ex post facto_ explicable as a function of the real conditions under which it really arose. Hence, "consciousness," set over against Reality, was not its condition. [37] C. Judson Herrick, "Some Reflections on the Origin and Significance of the Cerebral Cortex," _Journal of Animal Behavior_, Vol. III, pp. 228-233. [38] _Psychology_, Vol. I, p. 256. [39] H. C. Warren, _Psychological Review_, Vol. XXI, Page 93. [40] _Principles of Psychology_, I, p. 241, note. [41] _Ibid._, p. 258. [42] _Psychology. Briefer Course._ P. 468. [43] Angell, _Psychology_, p. 65. [44] _Psychology_, Vol. I, p. 251. [45] Thorstein Veblen: _The Instinct of Workmanship_, p. 316. [46] It may still be argued that we must depend upon analogy in our acceptance or rejection of a new commodity. For any element of novelty must surely suggest something to us, must _mean_ something to us, if it is to attract or repel. Thus, the motor-car will whirl us rapidly over the country, the motor-boat will dart over the water without effort on our part. And in such measure as we have had them hitherto, we have always enjoyed experiences of rapid motion. These new instruments simply promise a perfectly well-known _sort_ of experience in fuller measure. So the argument may run. And our mental process in such a case may accordingly be held to be nothing more mysterious than a passing by analogy from the _old_ ways in which we got rapid motion in the past to the _new_ way which now promises more of the same. And more of the same is what we want.