Chap. 1.- Introduction: How to Build a Talking Robot.- Part I.- Five Mysteries of Natural Language Communication.- Chap. 2.- Mystery Number One: Using External Surfaces.- Chap. 3.- Mystery Number Two: Cycle of Natural Language Communication.- Chap. 4.- Mystery Number Three: Memory Structure.- Chap. 5.- Mystery Number Four: Autonomous Control.- Chap. 6.- Mystery Number Five: Learning.- Part II.- The Coding of Content.- Chap. 7.- Semantic Relations...