Dewey adds to his idea that our knowledge of reality is a progressive development of its implicit ideality through a synthetic thought-process, the specification that the process of idealization occurs in connection with particular crises and situations. There comes a stage, he says, when unity begins to dawn and meaning emerges. Necessity is a term used in connection with these transitions from partial to greater realization of the world's total meaning. Necessity is a middle term, or go-between. It marks a critical stage in the development of knowledge. No necessity attaches to a whole, as such. "_Qua_ whole, the fact simply is what it is; while the parts, instead of being necessitated either by one another or by the whole, are the analyzed factors constituting, in their complete circuit, the whole."[65] But when the original whole breaks up, through its inability to comprehend new facts under its unity, a process of judgment occurs which aims at the establishment of a new unity. "The judgment of necessity, in other words, is exactly and solely the transition in our knowledge from unconnected judgments to a more comprehensive synthesis. Its value is just the value of this transition; as negating the old partial and isolated judgments--in its backward look--necessity has meaning; in its forward look--with reference to the resulting completely organized subject-matter--it is itself as false as the isolated judgments which it replaces."[66] We say that things must be so, when we do not know that they are so; that is, while we are in course of determining what they are. Necessity has its value exclusively in this transition. Dewey attempts to show, in a discussion which need not be followed in detail, that there is nothing radical in his view, and that it finds support among the idealists and empiricists alike. Thinkers of both schools (he quotes Caird and Venn) admit that the process of judgment involves a change in objects, at least as they are for us. There is a transformation of their value and meaning. "This point being held in common, both schools must agree that _the progress of judgment is equivalent to a change in the value of objects_--that objects as they are for us, as known, change with the development of our judgments."[67] Dewey proposes to give a more specific description of this process of transformation, and especially, to show how the idea of necessity is involved in it.