 David Lewis’ sender-receiver game is a cooperative game in which a sender observes a state of nature and chooses a signal, a receiver observes that signal and chooses an act, with both sender and receiver benefiting from an appropriate coordination between state of nature and act (Lewis 1969). A number of researchers have explored both analytic and computational models of signaling games with an eye to ways in which initially arbitrary signals can come to function in ways that start to look like meaning.