HOW DID PREDICATION EVOLVE?
This paper proposes an emergent definition of predication as a composite notion involving the convergence of two more basic properties, thematic role assignment and headedness. This definition makes it possible to construct a scenario in which predication evolves gradually over the course of time. Evidence for such a scenario is provided by a contemporary human language, Riau Indonesian, in which the convergence of thematic role assignment and headedness is not grammaticalized.