[cranks]

It sounds odd that one become non self-taught the moment he/she actually uses the language. I don't think there is anybody who are self-taught according to that definition. Being self-taught generally means not taking classes or having a tutor, at least in English. Now, having a language partner is a gray area. But usually these partners don't have any knowledge in "teaching" their native language, so I say it still doesn't tarnish the purity of self-teaching most of the time.