"The right phrase" How can we know that the Idea itself has any real existence apart from the Energy? Very strangely; by the fact that the Energy itself is conscious of referring all its acts to an existing and complete whole. Quite simply, every choice of an episode, or a phrase, or a word is made to conform to a pattern of the entire book, which is revealed by that choice as already existing. This truth, which is difficult to convey in explanation, is quite clear and obvious in experience. It manifests itself plainly enough when the writer says or thinks: “That is, or is not, the right phrase”—meaning that it is a phrase which does or does not correspond to the reality of the Idea. Dorothy Sayers, The Mind of the Maker wholeness
Their wrongness is somehow more immediate In general, a successful design, which Alexander terms a good fit between form and context, can be declared only when we can detect no more [points that conform to the standard against which we judge]. It is "departures from the norm which stand out in our minds, rather than the norm itself. Their wrongness is somehow more immediate than the rightness." Henry Petroski, The Evolution of Useful Things Notes on the Synthesis of Form