I would say most things have some "Form" of "Contrast " examples might be such as -hot and cold-,big and little-,black and white-,etc.
Excerpt from Principles of Learning:
Two of Aristotle’s three laws of learning—the law of similarity and the law of contrast (Hergenhahn, 1982, p. 35; Ross & Aristotle, 1906, pp. 4, 39, 111, 260)—have to do with the importance of relating what is already known with what is being learned. He also observed that ideas which “have orderly arrangement” are easily recalled, and that “things wanting in exactitude are with difficulty remembered” (Ross & Aristotle, 1906, p. 111).
Contrast shows up in Thorndike’s writing under the topics of assimilation, attention, prepotency of elements, belongingness, and stimulus identifiability:
1. Assimilation – “To any situations, which have no special original or acquired response of their own, the response made will be that which by original or acquired nature is connected with some situation which they resemble.” (Thorndike, 1914, p. 135)
2. Attention – “Unless two differing boxes are attended to, there will be no difference in the reactions to them.” (Thorndike, 1898, p. 101)
3. Prepotency of elements – Certain features of a situation may be prepotent in determining a response than others and an animal is able to attend to critical elements and ignore less important ones. From Thorndike (1914):
“Similarly, a cat that has learned to get out of a dozen boxes—in each case by pulling some loop, turning some bar, depressing a platform, or the like—will, in a new box, be, as we say, ‘more attentive to’ small objects on the sides of the box than it was before. The connections made may then be, not absolutely with the gross situation as a total, but predominantly with some element or elements of it.” (p. 134)
A great deal of attention has been given to the principle of contrast in cognitive information processing theory. According to this theory in order for information to be processed into long term memory it “must be meaningful and make connections with related knowledge already in long term memory” (Driscoll, 2000, p. 79) through a process of elaborative rehearsal (Sternberg & Williams, 2010, p. 274):
I was recently using some two-part silicone to make a mold for a object-thus creating a negative space of it.