alt Hacker NewsNo, if i recall the section in her autobiography, specifically it was being taught the concept of "i" / "me" that did it.
Up until that point language was just an extension of what she already knew, it was the learning of being other that did the trick. Being blind and deaf would certainly make it hard to draw a distinction between the self and the world, and while languaged helped her get that concept under wraps, i dont think it's strictly speaking required. Just one of many avenues towards.
But language is also the only way to communicate this. As far as I can tell my cat has a complex consciousnesses but there is no way for me to tell if she has this capacity for introspection and self-reflexivity.
If there are other avenues other than language, how would we know?
I think language is a medium that enables this kind of structured thought. Without it, I cannot imagine reaching this level of abstraction (understanding being a "self").