The fact that the processes of perception, memory, and anticipation are transformed in their logical operation into sensations and universals, terms, and relations, and, as such, become the subject-matter of logical theory, does not mean that they have lost their mediating character, and have become merely objects of logical contemplation at large. Sensations or sense-data, and ideas, terms and relations, are the subject-matter of logical theory for the reason that they sometimes succeed and sometimes fail in their logical operations. And it is the business of logical theory to diagnose the conditions of this success and failure. If, in writing, my pen becomes defective and is made an object of inquiry, it does not therefore lose all its character as a pen and become merely an object at large. It is _as_ an instrument of writing that it is investigated. So, sense-data, universals, terms, and relations as subject-matter of logic are investigated in their character _as_ mediators of the ambiguities and conflicts, of non-logical experience. If the operations of habit, instinct, perceptions, memory, and anticipation _become_ logical, when, instead of operating as direct stimuli, they are employed in a process of inquiry, we must next ask: (1) under what conditions do they pass over into this process of inquiry? (2) what modifications of operation do they undergo, what new forms do they take, and what new results do they produce in their logical operations? If the act of inquiry be not superimposed, it must arise out of some specific condition in the course of non-logical conduct. Once more, if the alarm be sounded at this proposal to find the origin of logical in non-logical operations it must be summarily answered by asking if the one who raises the cry finds it impossible to imagine that one who is not hungry, or angry, or patriotic, or wise may become so. Non-logical conduct is not the abstract formal contradictory of logical conduct any more than present satiety or foolishness is the contradictory of later hunger or wisdom, or than anger at one person contradicts cordiality to another, or to the same person, later. The old bogie of the logical irrelevance of origin was due to the inability to conceive continuity except in the form of identity in which there was no place for the notion of _growth_.