knowledge, and as a tool shaped out of the same subject-matter as that to which it is applied, is but to return to the Aristotelian tradition about logic. That the practice of science has in the meantime substituted a logic of experimental discovery (of which definition and classification are themselves but auxiliary tools) for a logic of arrangement and exposition of what is already known, necessitates, however, a very different sort of _Organon_. It makes necessary the conception that the object of knowledge is not something with which thinking sets out, but something with which it ends: something which the processes of inquiry and testing, that constitute thinking, themselves produce. Thus the object of knowledge is practical in the sense that it depends upon a specific kind of practice for its existence--for its existence as an object of knowledge. How practical it may be in any other sense than this is quite another story. The _object of knowledge_ marks an achieved triumph, a secured control--that holds by the very nature of knowledge. What other uses it may have depends upon its own inherent character, not upon anything in the nature of knowledge. We do not know the origin and nature and the cure of malaria till we can both produce and eliminate malaria; the _value_ of either the production or the removal depends upon the character of malaria in relation to other things. And so it is with mathematical knowledge, or with knowledge of politics or art. Their respective objects are not known till they are made in course of the process of experimental thinking. Their usefulness when made is whatever, from infinity to zero, experience may subsequently determine it to be. XIV THE LOGIC OF JUDGMENTS OF PRACTICE THEIR NATURE In introducing the discussion, I shall first say a word to avoid possible misunderstandings. It may be objected that such a term as "practical judgment" is misleading; that the term "practical judgment" is a misnomer, and a dangerous one, since all judgments by their very nature are intellectual or theoretical. Consequently, there is a danger that the term will lead us to treat as judgment and knowledge something which is not really knowledge at all and thus start us on the road which ends in mysticism or obscurantism. All this is admitted. I do not mean by practical judgment a type of judgment having a different organ and source from other judgments. I mean simply a kind of judgment having a specific type of subject-matter. Propositions exist relating to _agenda_--to things to do or be done, judgments of a situation demanding action. There are, for example, propositions of the form: M. N. should do thus and so; it is better, wiser, more prudent, right, advisable, opportune, expedient, etc., to act thus and so. And this is the type of judgment I denote practical.