Figure 1. Schematic representation of an interaction-transformation principle. Upper case letters represent objects; lower case letters represent interaction/force carriers. Transformation of objects (A to C, B to D) happens following the interaction driven by carriers (a and b). The interaction results in a change of the physical state of the object. Carrier “a” of object “A”, carrying a part of the physical state of object “A” now becomes a part of object “B”, leading to the transformation of object “B” into object “D” and the other way around.