Are you certain that you're not playing with words to arrive at a predetermined conclusion? What is this "I" to which you're referring and how can you demonstrate that "I" does not or cannot exist within systems such as these? Further, if you are to find something which qualifies as an "I" elsewhere, what makes that elsewhere fundamentally different and therefore capable of supporting and being an "I" and is that elsewhere such simply by definition or in and of itself? Further, if the language usage is indistinguishable from the language usage of an "I", is the difference of source meaningful? If so, why?