OK, but symbol literacy, at least in this sense, is a long way from literacy in a language having the grammar of the spoken language of these people (or a gramm

OK, but symbol literacy, at least in this sense, is a long way from literacy in a language having the grammar of the spoken language of these people (or a grammar equally as expressive, as we see, for example, in the case of scholars who read and wrote in Latin while conversing in the vernacular of their time and place.)