natural language does not emerge 'naturally' in multi-agent dialog, despite independently reported successful demonstrations in recent literature.
in a sequence of 'negative' results culminating in a 'positive' one, we find that while agents always successfully invent communication protocols and languages to achieve their goals with near-perfect accuracies, the invented languages are decidedly not compositional, interpretable, or 'natural'; and that it is possible to coax the invented languages to become more and more human-like and compositional by increasing restrictions on how two agents may communicate.