Wheelwright's notion of 'diaphor' is equivalent to the notion's of 'radical metaphor' and 'antimetaphor'.
Further, because the 'left-brain' seems to have such a problem with metaphor, viewing it as some kind of 'groundless speculation', both avoiding it and failing to grasp it--as Freud noted in distinguishing 'secondary process' from 'primary process'--it is essential to observe that the metaphoric and especially diaphoric poetic imagination operates by its own peculiar yet rigorous natural law. This is how Dylan Thomas describes the procedure:
"I make one image--though 'make' is not the word; I let, perhaps, an image be 'made' emotionally in me and then apply to it what intellectual and critical forces I possess; let it breed another, let that image contradict the first, make of the third image, bred out of the other two together, a fourth contradictory image, and let them all, within my imposed formal limits, conflict. Each image holds within it the seed of its own destruction, and my dialectical method, as I understand it, is a constant building up and breaking down of the images that come out of the central seed, which is itself destructive and constructive at the same time . . . The life in any poem of mine cannot move concentrically round a central image, the life must come out of the center; an image must be born and die in another; and any sequence of my images must be a sequence of creations, recreations, destructions, contradictions . . . Out of the inevitable conflict of images . . . I try to make that momentary peace which is a poem."
Whalley, G. (1967). Poetic process. New York: World. pp. 146.