Human communication typically involves two or more persons engaged in some type of discourse or conversation. The normal expectation is that one person will take a turn, contributing information or comments, asking a question, or providing an answer to an inquiry. Then another person will respond and continue the dialog by creating a comment generally connected to the thread that has been ongoing or provide a means of transition to change a topic.

The process of understanding this interaction between persons involves a series of potentially interesting questions. For example, how does anyone change a topic or introduce a shift in the ongoing dialog? Clearly, a conversation once started does provide for shifts or changes in topics and moves or recognized means of ...