The competence and performance distinction has a complex history in linguistic theory. With this short essay, I would like to step into the flow of that complex history by posing the question of difference, which asks what difference difference makes to linguistic theory. My argument will be that the difference difference makes can be registered through the design feature of language liguistic theory dubs reflexivity. For linguistic theory, reflexivity is not just one design feature among the others inasmuch as it is reflexivity itself that motivates the question of difference.
Torres, Hector A.. "The Subject of Linguistic Analysis: Competence, Performance, Style." (2002). https://digitalrepository.unm.edu/engl_fsp/9