“Conversation Theory is a summarization of our assumptions and rationale from this early period. Conversations are behaviors, but special kinds of behaviors with hard-valued observables in the form of concept sharings, detected as "understandings." Conversations are, we believe, the first basic data of psychological, social, or educational theory. We see later that people can even have conversations with themselves. Conversations which may lead to concept sharing need not be verbal. Often they are gestural, pictorial, or mediated through a computer interface.”