Scientific standards are by no means absolute, for they are subject to development and they depend largely on psychological assumptions. Revolutionary changes of thought as well as new discoveries led to the evolution from Ptolemy to Newton to Einstein. Science is inseparable from the scientist in all fields, including analysis, and the investigator as well as the subject matter studied must be investigated. Modern physics itself accepts the thesis that the exactness of science is inextricably bound to the exactness of psychology, inseparable from the rather subjective conditions of perception and reasoning. 'The more advanced the science, the more urgent the task of elucidating the deductive paths connecting such abstruse and recondite entities with the experiences to which, however indirectly, they refer' (Max Black). The irreducible ingredients of a science lie not in its 'rules' or 'facts' but in the attitude and the reality testing of the scientist.