  We further the theme of studying syntactic structures data from Longobardi
(2017b), Collins (2010), Ceolin et al. (2020) and Koopman (2011) using general
Markov models initiated in Shu et al. (2017), exploring the question of how
consistent the data is with the idea that general Markov models. The ideas
explored in the present paper are more generally applicable than to the setting
of syntactic structures, and can be used when analyzing consistency of data
with general Markov models. Additionally, we give an interpretation of the
methods of Ceolin et al. (2020) as an infinite sites evolutionary model and
compare it to the Markov model and explore each in the context of evolutionary
processes acting on human language syntax.
