Chapter 6 begins with an extended discussion of intentionality and pattern, and applies it to distinguishing the concepts of signal, cue, and incidental behavior.These concepts are then applied to a more precise definition of communication.There follows a detailed discussion of signals, signaling systems, and language. Then Chapter 6 covers the role of signals in conversation and in relationship.Finally, the chapter takes up the topic of ad hoc signals, and the question, whether communicative signals are analog or digital.