Roger laid out a generic view of the conversation (or any process, really) of last week. What we immediately see and experience is the content and process (on the right). But these occur inside of a context which is created by a number of invisible forces:
He asserted that these forces, the mental models, assumptions, values and beliefs are usually hidden beneath the context. The clues to their existence are paradox, emotional content, ambiguity and conflict in the process and its content.
For me, it looks a little more like this, where everything that happens is occurring inside an invisible sea of mental models, assumptions, values, and beliefs and therefore deeply influenced by them.