Do you have an inner voice?

Indeed, consciousness is a misterious thing. But it doesn’t sound worse than changing your argument into

But if you’re hearing and comprehending your own words for the first time when they come out of your mouth in your head, it seems like it could be argued they’re the words of someone else who lives in your brain and does n’t communicate with you.

Both ideas seem funny to me, but both are too simplistic, as the voice in your head will easily convince you of if you give it a chance. Anyway, I have convinced myself of it by writing it down.