That was totally impossible to do. I could speak those things out aloud, but I couldn't really do them inside my head. If someone asked me a question, I couldn't prepare an answer in my mind before speaking. And those existentially depressing places my thoguths sometimes goes to were also not accessible.
I expressed it to those around me as "I can't think", which was obviously not completely true, but I think I was so focused/grounded in the pretty overwhelming experience that my mind couldn't really waste CPU cycles on wandering or evaluating what the best answer was to a question.
Will you have linguistically formulated sentences "coming to you" without pause?
Notably, when I'm my loosest and "most authentic" socially, it just feels like the inner voice is speaking directly out, whereas most times it's more like the inner voice is giving instructions to a much less verbose underling.
I can think without formulating sentences in my head, but that's atypical for me. I'll even 'argue' in my head to help me make decisions!
I've never been in a situation where I couldn't use my inner voice, thought.