In the logical version of pragmatism termed instrumentalism, action or practice does indeed play a fundamental rôle. But it concerns not the nature of consequences but the nature of knowing. To use a term which is now more fashionable (and surely to some extent in consequence of pragmatism) than it was earlier, instrumentalism means a behaviorist theory of thinking and knowing. It means that knowing is literally something which we do; that analysis is ultimately physical and active; that meanings in their logical quality are standpoints, attitudes, and methods of behaving toward facts, and that active experimentation is essential to verification. Put in another way it holds that thinking does not mean any transcendent states or acts suddenly introduced into a previously natural scene, but that the operations of knowing are (or are artfully derived from) natural responses of the organism, which constitute knowing in virtue of the situation of doubt in which they arise and in virtue of the uses of inquiry, reconstruction, and control to which they are put. There is no warrant in the doctrine for carrying over _this_ practical quality into the consequences in which action culminates, and by which it is tested and corrected. A knowing as an act is instrumental to the resultant controlled and more significant situation; this does not imply anything about the intrinsic or the instrumental character of the consequent situation. That is whatever it may be in a given case. There is nothing novel nor heterodox in the notion that thinking is instrumental. The very word is redolent of an _Organum_--whether _novum_ or _veterum_. The term "instrumentality," applied to thinking, raises at once, however, the question of whether thinking as a tool falls within or without the subject-matter which it shapes into knowledge. The answer of formal logic (adopted moreover by Kant and followed in some way by all neo-Kantian logics) is unambiguous. To call logic "formal" means precisely that mind or thought supplies forms foreign to the original subject-matter, but yet required in order that it should have the appropriate form of knowledge. In this regard it deviates from the Aristotelian _Organon_ which it professes to follow. For according to Aristotle, the processes of knowing--of teaching and learning--which lead up to knowledge are but the actualization through the potentialities of the human body of the _same_ forms or natures which are previously actualized in Nature through the potentialities of extra-organic bodies. Thinking which is not instrumental to truth, which is merely formal in the modern sense, would have been a monstrosity inconceivable to him. But the discarding of the metaphysics of form and matter, of cyclic actualizations and eternal species, deprived the Aristotelian "thought" of any place within the scheme of things, and left it an activity with forms alien to subject-matter. To conceive of thinking as instrumental to truth or