Sören Stenlund, Language and Philosophical Problems, Chapter 1: "Language, Mind and Machines"

There are a number of conceptual confusions involved in standard formal approaches to the study of mind and language, including a tendency to assume that a formal calculus is actually present (in some sense) in ordinary practice, or somehow explains that practice. Formal calculi are valuable for particular activities, but they are no help in understanding language or mind as a whole.