In replying to the commentaries of Marks-Tarlow and Solow Glennon, I have provided some clarification and expansion on the epistemology of dynamic systems models. These models served as the basis for integrating neuroscientific research findings with the phenomena of self and identity. Some of the challenges offered by the commentators have been specifically addressed with reference to a clarification of a “linguistic system” and causality as it applies to nonlinear dynamics.