In other words, "to the extent that one person in the system construes the construction processes of another, he may play a role in a social process involving the other person" . This is Kelly's sociality corollary to his psychology of personal constructs. Kelly explains in more detail: If we can predict accurately what others will do, we can adjust ourselves to their behavior. If others know how to tell what we will do, they can adjust themselves to our behavior and may give us the right of way. This mutual adjustment to each other's viewpoint takes place, in the terms of the theory of personal constructs, because, to some extent, our construction subsumes the construction systems of others, and theirs, in part subsumes ours. Understanding does not have to be a one-way proposition; it can be mutual.