The current authors reply to a postscript by Coltheart, Tree, and Saunders which was in response to the current authors response on a comment by the current authors on the original article. The current authors begin by responding to the final challenge posed by Coltheart, Tree, and Saunders (2010). They believe that both experimental and computational methodologies should be aimed at explaining human behavior by uncovering the computational principles that govern the underlying cognitive and neural processes. While it is important to ensure that the explanation and principles remain self-consistent, there is no need for a single uber-simulation, just as there is no need for a single behavioral experiment that manipulates all relevant variables simultaneously. Detailed comparison between model and human performance is critical for evaluating and improving current understanding, but data fitting per se is not the goal of the enterprise.