As artificial intelligences (AI) become more powerful and pervasive, communication by, with, and among AIs has become a common feature of everyday life. Early in the history of AI, there was ELIZA—a simple program that utilized simple pattern-matching algorithms to simulate a psychotherapist interacting with the user of the program. Human communication with AIs has been depicted in film and fiction, from the iconic confrontation of humans with HAL in 2001: A Space Odyssey to the very human...