The chapters by Worden, Batali, Kirby, and Hurford (see Table 1), whom I shall refer to collectively as WBKH, use computer simulation to demonstrate that agents with no innate syntactic structure can interact to create and preserve both the lexicon and syntax of languages over many generations.
the chapters by Niyogi, Turkel, and Briscoe (collectively, NTB) all base their simulations on an innate Universal Grammar-the general form of grammar is built into the agents, and the lexicon is given little or no importance.