"Speech is the tug of war that pulls us together. Against all odds, the often-ill-defined thoughts of one person are refined and understood by another. Those talking are together sharing context. Perhaps sharing family and home. Gestures and looks confirm understanding and misunderstanding. Questions, requests for clarification, and repeating what was heard perfect the communication. It mostly works whenever the speakers are face to face, in synchrony, committed to the goal of communicating. By contrast letters, memos, emails, texts are far less likely to succeed. Not surprising as they are asynchronous."