What exactly is "internal monologue"? It's heavily debated in the comments. I don't understand though, because when you learn to read you're mouthing words, and over your lifetime it's actually very hard to not mouth words when you read.

It makes me think that internal monologue is precisely an artifact of language itself. In this way, this debate and surprise over people "not having it" is not really profound. All people internalize language, that's the only way that not-mimicked language synthesis can happen. This is different from parrots parroting back what they hear for example.

Anyway, I'm curious about this debate over internal monologue. Perhaps it's really that people don't retrospect. That's different. They don't adopt viewpoints outside of their own. Is this really a physical limitation vs a choice?

Am I just ignorant about the state of this science?