Science of Discovery is either, I. Mathematics; II. Philosophy; or III. Idioscopy.
Mathematics studies what is and what is not logically possible, without making itself responsible for its actual existence. Philosophy is positive science, in the sense of discovering what really is true; but it limits itself to so much of truth as can be inferred from common experience. Idioscopy embraces all the special sciences, which are principally occupied with the accumulation of new facts. [—]
Idioscopy has two wings: a. the Physical Sciences; and b. the Psychical, or Human Sciences.