[indrax]

For many cognitive processes, I don't see a clear survival value to conscious awareness of that process, so I don't expect that awareness to be a reliable feature. The survival relevant result of that cognition can still come through.

I also think that an internal voice that doesn't get conscious awareness is likely to become a process that doesn't present as voice. So it's not like someone can just pay more attention and hear something, because it stopped talking a long time ago.