Reading Group: Derrida's Voice and Phenomenon Discussion is kind of moot, as we don't think in the same dominant faculties in the first place, Spinoza knew that -- but a better example is... hmmm, don't recall the source of this one, damn, won't look as cool, but I think is was Chomsky probably...
He talked about trying an experiment where he would try to keep track of a minute, and see what he could do while doing that. He discovered that he could read, but not speak when doing it, and told a friend of his that didn't understand why he wouldn't be able to speak while doing it. So he learned to keep track of a minute and demonstrated that he could speak, but not read. Upon further analysis it came to light that Chromsky was just audibly counting in his head, occupying that faculty, so that he could look at the pages and read them, but not speak. Whereas his friend was visually imagining a clock counting, so that he couldn't "take his eyes of it" as it were to read, but he could speak no problem, because they thought in predominantly different faculties.