[zeknife]

Thinking is subconscious when working on complex problems. Thinking is symbolic or spatial when working in relevant domains. And in my own experience, I often know what is going to come next in my internal monologues, without having to actually put words to the thoughts. That is, the thinking has already happened and the words are just narration.

[Bootvis]

I too am never surprised by my brains narration but: Maybe the brain tricks you in never being surprised and acting like your thoughts are following a perfectly sensible sequence.

It would be incredibly tedious to be surprised every 5 seconds.